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Research progress in lead-less or lead-free three-dimensional perovskite absorber materials for solar cells 预览
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作者 Huan-yu Zhang Rui Li +2 位作者 Wen-wu Liu Mei Zhang Min Guo 《矿物冶金与材料学报:英文版》 SCIE EI CAS CSCD 2019年第4期387-403,共17页
The trend toward lead-free or lead-less perovskite solar cells(PSCs)has attracted increasing attention over the past few years because the toxicity of lead(Pb)is one of the substantial restrictions for large-scale app... The trend toward lead-free or lead-less perovskite solar cells(PSCs)has attracted increasing attention over the past few years because the toxicity of lead(Pb)is one of the substantial restrictions for large-scale applications.Researchers have investigated the viability of substituting Pb with other elements(group 14 elements,group 2 elements,transition-metal elements,and group 13 and 15 elements)in the three-dimensional(3D)perovskites by theoretical calculations and experimental explorations.In this paper,recent research progress in Pb-less and Pb-free PSCs on the perovskite compositions,deposition methods,and device structures are summarized and the main problems that hinder the enhancement of device efficiency and stability are discussed in detail.To date,the fully Sn-based PSCs have shown a power conversion efficiency(PCE)of 8.12%and poor device stability.However,lead-less PSCs have shown higher PCE and a better stability.In addition,the introduction of double-perovskite materials also draws researchers’attention.We believe that the engineering of elemental composition,perovskite deposition methods,and interfacial modification are critical for the future development of Pb-less and Pb-free PSCs. 展开更多
关键词 PEROVSKITE solar cells LEAD-FREE PEROVSKITE MATERIALS lead-less PEROVSKITE MATERIALS composition engineering stability
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In-situ fabricated anisotropic halide perovskite nanocrystals in polyvinylalcohol nanofibers: Shape tuning and polarized emission
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作者 Linghai Meng Changgang Yang +6 位作者 Jingjia Meng Yongzhi Wang Yong Ge Ziqiang Shao Guofeng Zhang Andrey L.Rogach Haizheng Zhong 《纳米研究:英文版》 SCIE EI CAS CSCD 2019年第6期1411-1416,共6页
We report an in-situ fabrication of halide perovskite (CH3NH3PbX3,CH3NH3 =methylammonium,MA,X =Cl,Br,I) nanocrystals in polyvinylalcohol (PVA) nanofibers (MAPbX3@PVA nanofibers) through electrospinning a perovskite pr... We report an in-situ fabrication of halide perovskite (CH3NH3PbX3,CH3NH3 =methylammonium,MA,X =Cl,Br,I) nanocrystals in polyvinylalcohol (PVA) nanofibers (MAPbX3@PVA nanofibers) through electrospinning a perovskite precursor solution.With the content of the precursors increased,the resulting MAPbBr3 nanocrystals in PVA matrix changed the shape from ellipsoidal to pearl-like,and finely into rods-like.Optimized MAPbBr3@PVA nanofibers show strong polarized emission with the photoluminescence quantum yield of up to 72%.We reveal correlations between the shape of in-situ fabricated perovskite nanocrystals and the polarization degree of their emission by comparing experimental data from the single nanofiber measurements with theoretical calculations.Polarized emission of MAPbBr3@PVA nanofibers can be attributed to the dielectric confinement and quantum confinement effects.Moreover,nanofibers can be efficiently aligned by using parallel positioned conductor strips with an air gap as collector.A polarization ratio of 0.42 was achieved for the films of well-aligned MAPbBr3@PVA nanofibers with a macroscale size of 0.5 cm × 2 cm,which allows potential applications in displays,lasers,waveguides,etc. 展开更多
关键词 lead HALIDE PEROVSKITE NANOFIBERS ELECTROSPINNING anisotropy polarized emission
Highly efficient and thermal stable guanidinium-based two-dimensional perovskite solar cells via partial substitution with hydrophobic ammonium
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作者 Yingzhu Zhang Jiehuan Chen +5 位作者 Xiaomei Lian Weitao Yang Jun Li Shuoxun Tian Gang Wu Hongzheng Chen 《中国科学:化学英文版》 SCIE EI CAS CSCD 2019年第7期859-865,共7页
Layered two-dimensional(2D)perovskite solar cells(PVSCs)with a chemical formula of C(NH2)3(CH3NH3)3Pb3I10(n=3)have been fabricated through additive engineering,wherein stoichiometrically equivalent guanidinium(GA+)and... Layered two-dimensional(2D)perovskite solar cells(PVSCs)with a chemical formula of C(NH2)3(CH3NH3)3Pb3I10(n=3)have been fabricated through additive engineering,wherein stoichiometrically equivalent guanidinium(GA+)and methylammonium(MA+)serve as spacer cations.The crystallinity of the perovskite films is dramatically enhanced with proper amount of methylammonium thiocyanate(MASCN)added into the precursor solution.In addition,we substitute a small amount of MA+with hydrophobic phenylethylammonium(PEA+),which can passivate trap states of the perovskite films.As a result,the open circuit voltage increases to 1.1 V and the best power conversion efficiency(PCE)of 10.12%is yielded.Furthermore,superior thermal stability and balanced moisture stability of the PEA-substituted GA-based PVSCs are demonstrated,compared to the popular 3D MAPbI3and 2D PEA-based PVSCs.They retain approximately 80%of the original PCE after 30 d at 20%relative humidity(RH),and 50%of the original PCE after 3200 min at 85°C without any encapsulation.This work suggests a new route to achieve both heat and humidity stable PVSCs by simply mixing different spacer cations. 展开更多
关键词 guanidinium-based 2D PEROVSKITE solar cells additive engineering PEA substitution stability
Vacuum-free fabrication of high-performance semitransparent perovskite solar cells via e-glue assisted lamination process
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作者 Hengkai Zhang Yaokang Zhang +6 位作者 Guang Yang Zhiwei Ren Wei Yu Dong Shen Chun-Shing Lee Zijian Zheng Gang Li 《中国科学:化学英文版》 SCIE EI CAS CSCD 2019年第7期875-882,共8页
From a base material of conductive polymer(poly-(3,4-ethylenedioxythiophene):poly(styrenesulfonate),PEDOT:PSS),a flexible and high-conductivity(as low as 45Ω/sq)transparent electrode was fabricated on polydimethylsil... From a base material of conductive polymer(poly-(3,4-ethylenedioxythiophene):poly(styrenesulfonate),PEDOT:PSS),a flexible and high-conductivity(as low as 45Ω/sq)transparent electrode was fabricated on polydimethylsiloxane elastomer by an acid treatment and transfer process.Combined with the D-sorbitol-doped PEDOT:PSS electric glue,we successfully demonstrated a vacuum-free and ambient lamination fabrication process for semi-transparent perovskite solar cells using triple cation Cs0.05(MA0.17FA0.83)0.95Pb(I0.83Br0.17)3perovskite.By this manufacturing-friendly lamination process,we fabricated semitransparent perovskite solar cell devices with power conversion efficiencies up to 16.4%and variable transparencies. 展开更多
关键词 PEROVSKITE solar cells LAMINATION electric GLUE semi-transparent vacuum-free fabrication
Formation mechanism of yolk-shell LaMnO3 microspheres prepared by P123-template and oxidation of NO
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作者 Lihui WU Qiuling JIANG +2 位作者 Li WANG Ying WANG Mengxue WANG 《材料科学前沿:英文版》 SCIE CSCD 2019年第1期77-86,共10页
The yolk-shell LaMnO3 perovskite microspheres were fabricated by a novel,simple and mild soft template approach.A series of template-P123 concentrations(0-6.12 mmol·L^-1)were employed to optimize the most complet... The yolk-shell LaMnO3 perovskite microspheres were fabricated by a novel,simple and mild soft template approach.A series of template-P123 concentrations(0-6.12 mmol·L^-1)were employed to optimize the most complete spheres.When the concentration of P123 is 3.0 mmol·L^-1,the obtained yolk-shell microspheres with a diameter of 200-700 nm were constructed by nanoparticles.The possible formation mechanism of the yolk-shell microspheres was revealed step by step via XRD,SEM,TEM,EDS and HRTEM.Molecules of P123 were suitably mixed with solvents for double shelled vesicles through self-assembly,which interacted with metal complexes to form P123-metal vesicles.After the removal of P123 and citric acid by calcination at 700 ℃,the yolk-shell LaMnO3 microspheres with through-channels were obtained.Through-channels on the surface were due to citric acid and the solid core was attributed to the shrink of inner vesicles.Prepared yolk-shell microsphere samples possessed a larger surface area and a higher maximum NO conversion value of 78% at 314 ℃ for NO oxidation,compared with samples without the yolk-shell structure. 展开更多
关键词 perovskite yolk-shell MICROSPHERES NO OXIDATION
Few-layer fbrmamidinium lead bromide nanoplatelets for ultrapuregreen and high-efficiency light-emitting diodes
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作者 Huan Fang Wei Deng +4 位作者 Xiujuan Zhang Xiuzhen Xu Meng Zhang Jiansheng Jie Xiaohong Zhang 《纳米研究:英文版》 SCIE EI CAS CSCD 2019年第1期171-176,共6页
Formamidinium lead bromide perovskite(FAPbBr3)nanocrystals have attracted increasing attention due to their greener photoluminescence(PL)and higher thermal stability in comparison to more popular methylammonium lead b... Formamidinium lead bromide perovskite(FAPbBr3)nanocrystals have attracted increasing attention due to their greener photoluminescence(PL)and higher thermal stability in comparison to more popular methylammonium lead bromide perovskite(MAPbBr3).Here we proposed a-facile and highly reproducible room-temperature method for the preparation of fewlayer(1-4)two-dimensional(2D)FAPbBr3 nanoplatelets(NPs)with ultrapure green PL at 532 nm and high photoluminescence quantum yield(PLQY)of 88%.High-efficiency ultrapure green light-emitting diodes(LEDs)based on the few-layer 2D FAPbBr3 NPs were further demonstrated.The LEDs showed a maximum current efficiency(CE)of 15.31cd/A and an external quantum efficiency(EQE)of 3.53%,which are significantly better than the FAPbBr3 polycrystalline film-based LEDs reported so far.Significantly,the 2D FAPbBr3 NPs-based LEDs exhibited an ultrapure-green color emission that could cover 97%of the Recommendation 2020(Rec.2020)color standard and 114%of the national television system committee(NTSC)standard in the CIE 1931 color space.Moreover,the devices possessed a much better stability than the MAPbBr3 nanocrystals-based LEDs in air;the half lifetime T50 of our devices was about 5 times Ion ger than that of MAPbBr3 nan ocrystals-based LEDs.This work demonstrates the great potential of FAPbBr3 NPs in light-emitting devices for future ultrahigh-resolution displays. 展开更多
关键词 formamidinium lead bromide perovskite few-layer NANOPLATELETS high-efficiency LIGHT-EMITTING diodes ultrapure-green ELECTROLUMINESCENCE
不同组成和结构LaMnO3钙钛矿负载Au催化剂的CO氧化活性 预览
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作者 何成欢 郭杨龙 +3 位作者 郭耘 王筠松 王丽 詹望成 《物理化学学报》 SCIE CAS CSCD 北大核心 2019年第4期422-430,共9页
采用乙二醇溶胶-凝胶法制备了计量比LaMnO3和非计量比LaMn1.2O3钙钛矿,并利用稀硝酸处理LaMnO3制备得到LaMnO3-AE,然后采用沉积沉淀法制备钙钛矿负载Au催化剂,以考察载体的结构和性质对Au的热稳定性以及催化剂活性的影响。通过X射线衍射... 采用乙二醇溶胶-凝胶法制备了计量比LaMnO3和非计量比LaMn1.2O3钙钛矿,并利用稀硝酸处理LaMnO3制备得到LaMnO3-AE,然后采用沉积沉淀法制备钙钛矿负载Au催化剂,以考察载体的结构和性质对Au的热稳定性以及催化剂活性的影响。通过X射线衍射(XRD)、透射电镜(TEM)、X射线光电子能谱(XPS)和H2程序升温还原(H2-TPR)等表征,发现LaMnO3和LaMn1.2O3钙钛矿载体虽然有利于Au的分散,但是Au的热稳定性相对较差。相反,经稀硝酸刻蚀的LaMnO3钙钛矿(LaMnO3-AE)不利于Au的分散,但是有利于提高Au的热稳定性。在CO氧化反应中,当催化剂在低于500℃焙烧时,LaMn1.2O3钙钛矿负载Au催化剂的活性要显著高于LaMnO3和LaMnO3-AE负载Au催化剂的活性,而当催化剂焙烧温度升高至700℃以上时,LaMnO3-AE负载Au催化剂却要显著优于LaMnO3和LaMn1.2O3钙钛矿负载Au催化剂的活性。 展开更多
关键词 钙钛矿 表面结构 Au纳米颗粒 CO氧化 酸刻蚀
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微波法制备钙钛矿结构的锂离子导体La0.56Li0.33TiO3(英文)
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作者 吕晓娟 王蕊 +2 位作者 刘文宇 陆威旭 刘维捷 《硅酸盐学报》 EI CAS CSCD 北大核心 2019年第6期725-729,共5页
采用微波法制备了钙钛矿结构的锂离子导体材料La0.56Li0.33TiO3。将微波炉热处理过的粉末与管式炉热处理的粉末以不同比例混合,制备了La0.56Li0.33TiO3圆片。经过微波炉1 000℃热处理之后,所有的样品均结晶生成了四方相。与在管式炉中1 ... 采用微波法制备了钙钛矿结构的锂离子导体材料La0.56Li0.33TiO3。将微波炉热处理过的粉末与管式炉热处理的粉末以不同比例混合,制备了La0.56Li0.33TiO3圆片。经过微波炉1 000℃热处理之后,所有的样品均结晶生成了四方相。与在管式炉中1 200℃烧结的样品相比,微波炉烧结得到的样品的总电导率和晶界电导率都更高。总电导率和晶界电导率的提高归因于微波烧结所产生的更适合的锂离子迁移通道以及更大的晶胞尺寸。所有样品的锂离子迁移数都接近于1,意味着所制备的样品均为离子导体。因此,微波烧结可用于在较低的温度制备锂电解质,克服了传统高温烧结的锂损失问题。 展开更多
关键词 微波 钙钛矿 锂离子导体 晶界
Influence of defect states on the performances of planar tin halide perovskite solar cells 预览
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作者 Shihua Huang Zhe Rui +1 位作者 Dan Chi Daxin Bao 《半导体学报:英文版》 EI CAS CSCD 2019年第3期19-24,共6页
Although tin halide perovskite has shown excellent photoelectric performance, its efficiency of solar cell is low compared with that of lead halide. In order to enhance the efficiency of tin halide perovskite solar ce... Although tin halide perovskite has shown excellent photoelectric performance, its efficiency of solar cell is low compared with that of lead halide. In order to enhance the efficiency of tin halide perovskite solar cell, a deep understanding of the role of the defects in the perovskite absorption layer and at the electron transport layer(ETL)/absorber or absorber/hole transport layer(HTL) interface is very necessary. In this work, the planar heterojunction-based CH3NH3SnI3 perovskite solar cells were simulated with the SCAPS-1D program. Simulation results revealed a great dependence of device efficiency on defect density and interface quality of the perovskite absorber. The defect density at the front interface is critical for high efficiency, and the polarity of the interface charge has a different impact on the device efficiency. Strikingly, an efficiency over 29% was obtained under the moderate simulation conditions. 展开更多
关键词 simulation TIN HALIDE PEROVSKITE interface DEFECT state HETEROJUNCTION solar cell
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Rapid Growth of Halide Perovskite Single Crystals:From Methods to Optimization Control
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作者 Yu-Ling Wang Shuai Chang +4 位作者 Xiao-Mei Chen Yan-Dong Ren Li-Fu Shi Yong-Hao Liu Hai-Zheng Zhong 《中国化学:英文版》 SCIE CAS CSCD 2019年第6期616-629,共14页
Metal halide perovskites are emerging as new generation optoelectronic materials due to their high carrier mobility, long carrier diffusion length and large light absorption coefficient, which have broad applications ... Metal halide perovskites are emerging as new generation optoelectronic materials due to their high carrier mobility, long carrier diffusion length and large light absorption coefficient, which have broad applications in solar cell, light-emitting diode, laser, photodetector and transistors. Perovskite single crystal is an ideal platform for discerning the intrinsic properties of these materials. In some cases, perovskite single crystals are better candidates to gain high performance optoelectronics. However, the growth of perovskite single crystals is time and cost consuming, which has an obvious disadvantage for device exploration. Therefore, fast growth technique is highly desirable in not only promoting the use of perovskites in commercial applications but also facilitating deep physical investigation of the materials. In this review, we summarize thoroughly the development of fast growth of the halide perovskites single crystal. Specifically, we highlight the progress of rapid growth techniques with emphasis on the optimization control. 展开更多
关键词 crystal GROWTH SEMICONDUCTORS synthetic methods metal HALIDE PEROVSKITE single CRYSTALS rapid GROWTH
制钛过程中阴极钙钛矿的形成与阳极溢出气体间的关系
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作者 胡蒙均 马通祥 +6 位作者 高雷章 赖平生 屈正峰 温良英 胡丽文 邱贵宝 扈玫珑 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2019年第7期2146-2150,共5页
采用FFC剑桥工艺在熔融CaCl2中电解二氧化钛时,钙钛矿是阴极上不可避免形成的相。研究了在制备钛的过程中,阴极钙钛矿的形成与阳极释放气体的关系。结果表明,阴极上相的形成主要有3个阶段,包括钙钛矿的形成、钙钛矿的脱氧及钛的低价氧... 采用FFC剑桥工艺在熔融CaCl2中电解二氧化钛时,钙钛矿是阴极上不可避免形成的相。研究了在制备钛的过程中,阴极钙钛矿的形成与阳极释放气体的关系。结果表明,阴极上相的形成主要有3个阶段,包括钙钛矿的形成、钙钛矿的脱氧及钛的低价氧化物脱氧为Ti O和Ti O到Ti的脱氧。尽管分解电压低于CaCl2,但阴极形成的钙钛矿与从阳极释放的气体密切相关。由于短时间内钙钛矿的形成造成过电压,因而阳极释放出氯气,氯气的量取决于Ti O2和电解过程中产生的不同低价钛的量。当钛的低价氧化物介于Ti3O5和Ti O2之间时,在第1脱氧阶段Ti O2和氯气的质量比为9:2到9:4。在氯气释放的过程中阳极没有明显的消耗。钙钛矿的形成和Ti2O的脱氧是在熔融CaCl2中电解制备钛的主要限制性环节。从Ti O2到Ti的总电流效率是24.07%。目前第1阶段的电流效率在22.37%~44.74%之间,第2阶段在30.18%~37.72%之间。 展开更多
关键词 熔盐电解 钙钛矿 阳极气体
LaNixFe1-xO3钙钛矿光催化降解碱性品红 预览
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作者 吴丹 詹海鹃 +2 位作者 刘宇凤 吴之强 刘万毅 《硅酸盐通报》 CAS 北大核心 2019年第6期1832-1838,共7页
通过溶胶-凝胶法控制合成一系列掺杂型LaNixFe1-xO3(x=0.1,0.3,0.5,0.7,0.9)钙钛矿材料,研究其在氙灯条件下对碱性品红降解的效果并解析其降解机理。结合X射线衍射(XRD)、扫描电镜(SEM)、光电子能谱(XPS)等分析测试与光催化降解评价结果... 通过溶胶-凝胶法控制合成一系列掺杂型LaNixFe1-xO3(x=0.1,0.3,0.5,0.7,0.9)钙钛矿材料,研究其在氙灯条件下对碱性品红降解的效果并解析其降解机理。结合X射线衍射(XRD)、扫描电镜(SEM)、光电子能谱(XPS)等分析测试与光催化降解评价结果,探究复合氧化物的结构性能与催化效能。研究发现,该LaNixFe1-xO3材料在降解碱性品红溶液时均具有良好效果,其中LaNi0.9Fe0.1O3催化效果最好,当Ni的掺杂量较高时具有更大的比表面积,暴露更多的活性位点,催化剂表面含有更多吸附氧O-/O-2物种,有利于降解碱性品红分子,降解率可达到97%,且有稳定高效的重复利用率。 展开更多
关键词 钙钛矿 光催化 碱性品红
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Efficient p-i-n structured perovskite solar cells employing low-cost and highly reproducible oligomers as hole transporting materials
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作者 Erpeng Li Wenqin Li +8 位作者 Linchang Li Hao Zhang Chao Shen Zihua Wu Weiwei Zhang Xiaojia Xu He Tian Wei-Hong Zhu Yongzhen Wu 《中国科学:化学英文版》 SCIE EI CAS CSCD 2019年第6期767-774,共8页
The development of p-i-n structured perovskite solar cells(PSCs) requires more extensive explorations on seeking efficient, low cost and stable hole transporting materials(HTMs). Small molecular HTMs are superior to p... The development of p-i-n structured perovskite solar cells(PSCs) requires more extensive explorations on seeking efficient, low cost and stable hole transporting materials(HTMs). Small molecular HTMs are superior to polymeric ones in terms of synthetic reproducibility as well as purity. However, thin films composed of small molecules are usually labile during the solution-based perovskite deposition. Herein, we propose a molecular engineering strategy of incorporating oligothiophene as conjugation bridge to develop robust oligomer HTMs for p-i-n type PSCs. Upon increasing the oligothiophene chain length from α-bithiophene to α-quaterthiophene and α-hexathiophene, their HOMO energy levels remain unchanged, but their solubility in common organic solvents decreased remarkably, thus greatly enhancing their tolerance to the perovskite deposition. The rational design of oligothiophene chain length can effectively tune their optoelectronic properties as well as thin film stability under polar solvent soaking. The best performance is achieved by an α-quaterthiophene based HTM(QT), showing a high efficiency of 17.69% with fill factor of 0.81, which are comparable to those of a commercially available benchmark polymer HTM(poly[bis(4-phenyl)(2,4-dimethylphenyl) amine], PTAA) based devices fabricated under the same conditions. Our developed oligomer system not only provides the definite molecular structures like small molecule-type HTMs, but also exhibits the excellent filmforming like polymer-type HTMs, thus achieving the well-balanced parameters among solvent tolerance, thin film conductivity,and interfacial charge transfer efficiency, especially building up a platform to develop low cost and reproducible efficient HTMs in p-i-n structured perovskite solar cells. 展开更多
关键词 PEROVSKITE solar cells P-I-N device structure hole transporting MATERIALS OLIGOMERS REPRODUCIBILITY
La0.5Sr0.5Co0.8Mn0.2O3-δ钙钛矿对过一硫酸盐降解水中四溴双酚A影响实验研究
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作者 毛韦达 胡翔 《地学前缘》 EI CAS CSCD 北大核心 2019年第3期255-262,共8页
研究了La0.5Sr0.5Co0.8Mn0.2O3-δ钙钛矿活化过氧单硫酸盐对四溴双酚A(TBBPA)的降解作用,重点探讨不同的煅烧温度制备镧锶钴锰钙钛矿(LSCM82)的催化性能对过一硫酸盐降解TBBPA的影响,以及溶液的不同初始pH条件对优选材料体系降解效率的... 研究了La0.5Sr0.5Co0.8Mn0.2O3-δ钙钛矿活化过氧单硫酸盐对四溴双酚A(TBBPA)的降解作用,重点探讨不同的煅烧温度制备镧锶钴锰钙钛矿(LSCM82)的催化性能对过一硫酸盐降解TBBPA的影响,以及溶液的不同初始pH条件对优选材料体系降解效率的影响。结果发现,变价离子的氧化还原对Co3+/Co2+和(Mn4++Mn3+)/Mn2+是催化剂活性的主要贡献者。煅烧温度为950℃且具有适量间隙氧及比表面积的LSCM82-950催化反应速率较高。在中性pH环境条件下应用LSCM82-950活化过一硫酸盐降解水中TBBPA污染物,既可以使催化剂钴浸出很少,又能达到最大程度的TBBPA降解效果。 展开更多
关键词 钙钛矿 过一硫酸盐 四溴双酚A 降解 高级氧化技术
Homogenizing the sulfonic acid distribution of DMF-modified PEDOT:PSS films and perovskite solar cells 预览
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作者 Hongliang Li Cuiling Zhang +3 位作者 Yunping Ma Zhiqiang Li Ying Xu Yaohua Mai 《能源化学:英文版》 SCIE EI CAS CSCD 2019年第5期71-77,共7页
Inverted perovskite solar cells using pristine PEDOT:PSS as the hole-transporting layer (HTL) have been widely studied for its less hysteresis and low-temperature preparation technologies. However, this device suffers... Inverted perovskite solar cells using pristine PEDOT:PSS as the hole-transporting layer (HTL) have been widely studied for its less hysteresis and low-temperature preparation technologies. However, this device suffers from an inferior open-circuit voltage (VOC) and stability problems. Several attempts have made on film formation and interface engineering to improve the efficiency. Modification proved beneficial to decrease energy offset at the interface between the HTL layer and the adjacent perovskite layer. In this paper, modification PEDOT:PSS layers were realized with a dimethyl formamide (DMF) solvent. The sulfonic acid distribution was homogenized in the normal directi on after modification. The work function of the modified PEDOT:PSS layers increased from 4.71 to 5.07eV, and the conductivity of modified PEDOT:PSS increased from 3×10^-4 to 0.45 S/cm. The as-deposited perovskite films were more uniform with larger grain sizes and less pinholes, resulting in an improved VOC from 0.93 to 1.048 V, while the efficiency was increased from 11.5% to 16.8%. Solar cells without encapsulation under the 50 h and 50% humidity aging test showed 7% degradation of fill factor (FF) with 50 v/v% PEDOT:PSS layer, while the fill factor decreased 11.2% in the 0 v/v% PEDOT:PSS layer, respectively. 展开更多
关键词 MODIFICATION HYSTERESIS INVERTED PEROVSKITE solar cells (PSCs)
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Controlled fabrication, lasing behavior and excitonic recombination dynamics in single crystal CH3NH3PbBr3 perovskite cuboids
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作者 Fangtao Li Junfeng Lu +7 位作者 Qinglin Zhang Dengfeng Peng Zheng Yang Qian Xu Caofeng Pan Anlian Pan Tianfeng Li Rongming Wang 《科学通报:英文版》 SCIE EI CSCD 2019年第10期698-704,共7页
As a direct bandgap semiconductor, organic-inorganic lead halide perovskite (MAPbX3, MA = CH3NH3, X =Cl, Br, I) have been considered as promising materials for laser due to their excellent optoelectronic properties. T... As a direct bandgap semiconductor, organic-inorganic lead halide perovskite (MAPbX3, MA = CH3NH3, X =Cl, Br, I) have been considered as promising materials for laser due to their excellent optoelectronic properties. The perovskite materials with ID and 2D shapes were widely prepared and studied for Fabry-Perot mode and whispering-gallery-mode (WGM) microcavities, but cuboid-shape is rarely reported. In this work, we successfully fabricated single crystal cuboid-shaped MAPbBr3 perovskite w让h different morphologies, named microcuboid-MAPbBr3 (M-MAPbBr3) and multi-step-MAPbBr3 (MSMAPbBr3), via solvothermal method. Furthermore, the as-prepared *crystals excitonic recombination lifetime under different pumping energy density was studied by time-resolved photoiuminescence (TRPL). Based on controllable morphology and remarkable lasing properties, these cuboid shaped single crystal perovskite could be a promising candidate for small laser, and other optoelectronic devices. 展开更多
关键词 Lead HALIDE PEROVSKITE SOLVOTHERMAL method Single crystal CUBOID LASING TRPL
喷墨打印钙钛矿太阳能电池研究进展与展望 预览
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作者 夏俊民 梁超 邢贵川 《物理学报》 SCIE EI CAS CSCD 北大核心 2019年第15期167-177,共11页
作为近年来光伏领域最具竞争力的材料之一,有机-无机杂化钙钛矿受到了广泛的关注.然而,由于薄膜制备手段的限制,工业化大面积生产钙钛矿太阳能电池仍处于起步阶段.喷墨打印技术是由家庭和办公室印刷发展而来的一种重要的工业制造技术,... 作为近年来光伏领域最具竞争力的材料之一,有机-无机杂化钙钛矿受到了广泛的关注.然而,由于薄膜制备手段的限制,工业化大面积生产钙钛矿太阳能电池仍处于起步阶段.喷墨打印技术是由家庭和办公室印刷发展而来的一种重要的工业制造技术,广泛应用于各种印刷电子行业.与其他沉积方法相比,它具有成本低、材料利用率高和图案化精度高等优势.作为一种直接书写技术,喷墨打印已经显示出了巨大的工业化潜力,并有望在钙钛矿太阳能电池产业化中获得应用.本文回顾了喷墨打印钙钛矿太阳能电池的发展进程,对喷墨打印技术应用到钙钛矿太阳能电池的各个功能层(电极、空穴传输层、电子传输层、钙钛矿活性层)的情况进行了总结,并分析了喷墨打印钙钛矿太阳能电池的现状.最后,讨论了现阶段喷墨打印钙钛矿太阳能电池所面临的挑战,并对未来喷墨打印技术在钙钛矿材料的商业化应用方面进行了展望. 展开更多
关键词 喷墨打印技术 钙钛矿 太阳能电池 大面积制造
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Novel donor-acceptor-donor structured small molecular hole transporting materials for planar perovskite solar cells 预览
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作者 Xiaojuan Zhao Yunyun Quan +4 位作者 Han Pan Qingyun Li Yan Shen Zu-Sheng Huang Mingkui Wang 《能源化学:英文版》 SCIE EI CAS CSCD 2019年第5期85-92,共8页
Novel donor-acceptor-donor structured small molecular hole transporting materials are developed through a facile route by crosslinking dithienopyrrolobenzothiadiazole and phenothiazine or triarylamine-based donor unit... Novel donor-acceptor-donor structured small molecular hole transporting materials are developed through a facile route by crosslinking dithienopyrrolobenzothiadiazole and phenothiazine or triarylamine-based donor units. The strong push/pull electron capability of dithienopyrrolobenzothiadiazole/ phenothiazine and large π-conjugated dithienopyrrolobenzothiadiazole facilitate hole mobility and high conductivity. The devices using the dithienopyrrolobenzothiadiazole/phenothiazine-based hole trans-porting material achieved a power conversion efficiency of 14.2% under 1 sun illumination and improved stability under 20% relative humidity at room temperature without encapsulation. The present finding highlights the potential of dithienopyrrolobenzothiadiazole-based donor-acceptor-donor small molecular hole transporting materials for perovskite solar cells. 展开更多
关键词 HOLE-TRANSPORT material DONOR ACCEPTOR PEROVSKITE Solar cell
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A one-pot method for controlled synthesis and selective etching of organic-inorganic hybrid perovskite crystals 预览
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作者 Yu Hou Mengjiong Chen +1 位作者 Hongwei Qiao Huagui Yang 《能源化学:英文版》 SCIE EI CAS CSCD 2019年第6期149-154,共6页
Organometal halide perovskites have recently emerged with a huge potential for photovoltaic applications. Moreover, preparation of high-quality perovskite crystals with controlled morphology is of great significance f... Organometal halide perovskites have recently emerged with a huge potential for photovoltaic applications. Moreover, preparation of high-quality perovskite crystals with controlled morphology is of great significance for the fundamental studies such as optical and electrical properties, as well as the applications. Here, we report a one-pot solvothermal process to synthesize sheet-shaped CH3NH3PbBr3 single crystals with the lateral size of 100 μm and the thickness of 3–8 μm. Furthermore, a controlled etching behavior on the crystalline surface was demonstrated, which could be the irregular collapse of the crystalline surface caused by the local accumulation of methylammonium cations. Using this technique,CH3NH3PbBr3 single crystal sheets could be used in the various optoelectronic devices, such as nanolaser,optical sensors, photodetectors and field effect transistors. 展开更多
关键词 CRYSTAL GROWTH PEROVSKITE SOLVOTHERMAL ETCHING effect
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钙钛矿太阳能电池二氧化锡电子传输层的优化 预览
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作者 李启华 邓立波 张培新 《深圳大学学报:理工版》 CAS CSCD 北大核心 2019年第4期392-397,共6页
电子传输层是钙钛矿太阳能电池的关键材料,其中,二氧化锡(SnO2)被认为是一种理想的电子传输材料。目前采用的溶胶-凝胶法低温制备的SnO2电子传输层结晶性差,电子传输性能低.通过以水作为SnO2溶胶-凝胶前驱液添加剂提高所制备的SnO2结晶... 电子传输层是钙钛矿太阳能电池的关键材料,其中,二氧化锡(SnO2)被认为是一种理想的电子传输材料。目前采用的溶胶-凝胶法低温制备的SnO2电子传输层结晶性差,电子传输性能低.通过以水作为SnO2溶胶-凝胶前驱液添加剂提高所制备的SnO2结晶性,最终可提高太阳能电池效率.采用溶胶-凝胶法制备了SnO2电子传输层,优化了其制备条件.研究发现,以适量的水作为SnO2溶胶-凝胶的溶剂添加剂,在80℃下配制SnO2溶胶-凝胶旋涂液并陈化24h,有利于锡源SnCl2水解,促进SnO2生成和结晶性提高.最后,利用旋涂退火制备了SnO2电子传输层薄膜。随着水添加量增加,所制备的SnO2的结晶性和电子传输性能逐渐提高。当水添加量为150μL时,可获得平整致密的SnO2薄膜,所制SnO2的结晶性和电子传输性能都有所提高,短路电流密度达到22.77mA/cm^2,开路电压达到1.037V,填充因子为0.492,光电转换效率达到11.617%。水添加量增至300μL时,会导致制备的SnO2薄膜缺陷增多,效率降低。 展开更多
关键词 纳米材料 太阳能电池 钙钛矿 二氧化锡 低温法 电子传输层
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