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Preparation of CH_3NH_3PbI_3 thin films for solar cells via Vapor Transfer Method 被引量:1
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作者 Kejie Feng Yitong Liu +2 位作者 Yuancheng Zhang Yujie Liu Xiaoliang Mo 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2018年第5期1386-1389,共4页
Organometal halide perovskite based solar cells have emerged as one of the most promising candidates for low-cost and high-efficiency solar cell technologies. Here a Vapor Transfer Method (VTM) is used to fabricate ... Organometal halide perovskite based solar cells have emerged as one of the most promising candidates for low-cost and high-efficiency solar cell technologies. Here a Vapor Transfer Method (VTM) is used to fabricate high quality perovskite thin films in a balanced vacuum capsule. By adjusting the reaction tem- perature, CH_3NHl_3 saturated vapor which then reacts with Pbl_2 films can be controlled and the formation process of CH_3NH_3Pbl_3 perovskite films can be further influenced. Prepared perovskite films which ex- hibit pure phase, smooth surface and high crystallinity are assembled into planar heterojunction inverted solar cells. The whole fabrication process of solar cell devices is organic solution free. Finally, the cham- pion cell achieved power conversion efficiency (PCE) of 13.08% with negligible current-voltage hysteresis under fully open-air conditions. The photovoltaic performance could be further enhanced by optimizing perovskite composition and the device structure. 展开更多
关键词 Vapor Transfer Method Organometal halide perovskite planar heterojunction Inverted architecture Solar cells
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Doping Electron Transporting Layer:An Effective Method to Enhance J_(SC)of All-Inorganic Perovskite Solar Cells
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作者 Chao Liang Guichuan Xing 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2021年第4期500-501,共2页
All-inorganic metal-halide CsPbBr_(3)perovskite has emerged as an attractive photovoltaic material for its outstanding environmental stability.However,due to the wide bandgap,the performance of CsPbBr_(3)perovskite so... All-inorganic metal-halide CsPbBr_(3)perovskite has emerged as an attractive photovoltaic material for its outstanding environmental stability.However,due to the wide bandgap,the performance of CsPbBr_(3)perovskite solar cells(PSCs)is limited,especially for the short-circuit current density(J_(SC)).In this issue of Energy&Environmental Materials,Guo et al.employed Nb-doped SnO_(2)as electron transporting layers(ETLs),which could greatly improve the J_(SC)of the PSCs based on all-inorganic CsPbBr_(3). 展开更多
关键词 all-inorganic perovskite depletion region width DOPING planar heterojunction
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High-performance planar heterojunction perovskite solar cells: Preserving long charge carrier diffusion lengths and interracial engineering 被引量:15
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作者 Sai Bai Zhongwei Wu +10 位作者 Xiaojing Wu Yizheng Jin Ni Zhao Zhihui Chen Qingqing Mei Xin Wang Zhizhen Ye Tao Song Ruiyuan Liu Shuit-tong Lee Baoquan Sun 《Nano Research》 SCIE EI CAS CSCD 2014年第12期1749-1758,共10页
We demonstrate that charge carrier diffusion lengths of two classes of perovskites, CH3NH3PbI3-xClx and CH3NH3PbI3, are both highly sensitive to film processing conditions and optimal processing procedures are critica... We demonstrate that charge carrier diffusion lengths of two classes of perovskites, CH3NH3PbI3-xClx and CH3NH3PbI3, are both highly sensitive to film processing conditions and optimal processing procedures are critical to preserving the long carrier diffusion lengths of the perovskite films. This understanding, together with the improved cathode interface using bilayer-structured electron transporting interlayers of [6,6]-phenyl-C61-butyric acid methyl ester (PCBM)/ZnO, leads to the successful fabrication of highly efficient, stable and reproducible planar heterojunction CH3NH3PbI3-xCl2 solar cells with impressive power-conversion efficiencies (PCEs) up to 15.9%. A 1-square-centimeter device yielding a PCE of 12.3% has been realized, demonstrating that this simple planar structure is promising for large-area devices. 展开更多
关键词 perovskite solar cells planar heterojunction charge carrier diffusion lengths ZnO nanocrystal films large area devices
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Solution sequential deposited organic photovoltaics:From morphology control to large-area modules 被引量:1
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作者 Jianhua Jing Yuejia Dou +2 位作者 Shihao Chen Kai Zhang Fei Huang 《eScience》 2023年第4期39-64,共26页
Organic optoelectronic materials enable cutting-edge,low-cost organic photodiodes,including organic solar cells(OSCs)for energy conversion and organic photodetectors(OPDs)for image sensors.The bulk heterojunction(BHJ)... Organic optoelectronic materials enable cutting-edge,low-cost organic photodiodes,including organic solar cells(OSCs)for energy conversion and organic photodetectors(OPDs)for image sensors.The bulk heterojunction(BHJ)structure,derived by blending donor and acceptor materials in a single solution,has dominated in the construction of active layer,but its morphological evolution during film formation poses a great challenge for obtaining an ideal nanoscale morphology to maximize exciton dissociation and minimize nongeminate recom-bination.Solution sequential deposition(SSD)can deliver favorable p–i–n vertical component distribution with abundant donor/acceptor interfaces and relatively neat donor and acceptor phases near electrodes,making it highly promising for excellent device performance and long-term stability.Focusing on the p–i–n structure,this review provides a systematic retrospect on regulating this morphology in SSD by summarizing solvent selection and additive strategies.These methods have been successfully implemented to achieve well-defined morphology in ternary OSCs,all-polymer solar cells,and OPDs.To provide a practical perspective,comparative studies of device stability with BHJ and SSD film are also discussed,and we review influential progress in blade-coating techniques and large-area modules to shed light on industrial production.Finally,challenging issues are out-lined for further research toward eventual commercialization. 展开更多
关键词 Organic solar cells Organic photodetectors Solution sequential deposition Solution processed planar heterojunction Morphology control
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Over 16% efficiency all-polymer solar cells by sequential deposition 被引量:5
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作者 Bangbang Li Xuanyu Zhang +11 位作者 Ziang Wu Jie Yang Bin Liu Qiaogan Liao Junwei Wang Kui Feng Rui Chen Han Young Woo Fei Ye Li Niu Xugang Guo Huiliang Sun 《Science China Chemistry》 SCIE EI CSCD 2022年第6期1157-1163,共7页
All-polymer solar cells(all-PSCs) have received extensive attention due to their excellent mechanical robustness and performance stability. However, the power conversion efficiency(PCE) of all-PSCs still lags behind t... All-polymer solar cells(all-PSCs) have received extensive attention due to their excellent mechanical robustness and performance stability. However, the power conversion efficiency(PCE) of all-PSCs still lags behind those of organic solar cells(OSCs)based on non-fullerene small molecule acceptors. Herein, we report highly efficient all-PSCs via sequential deposition(SD) with donor and acceptor layers coated sequentially to optimize the film microstructure. Compared with the bulk heterojunction(BHJ)all-PSCs, an optimized morphology with vertical component distribution was achieved for the SD-processed all-PSCs due to the synergistic effect of swelling of polymer films and using additive. Such strategy involves using chlorobenzene as the first layer processing-solvent for polymer donor, chloroform as the second processing-solvent for polymer acceptor with trace 1-chloronaphthalene, efficiently promoting exciton dissociation and charge extraction and reducing trap-assisted recombination.Consequently, over 16% all-PSCs fabricated via SD method was realized for the first time, which is much higher than that(15.2%) of its BHJ counterpart and also among the highest PCEs in all-PSCs. We have further demonstrated the generality of this approach in various all-polymer systems. This work indicates that the SD method can yield excellent all-PSCs and provides a facile approach to fabricating high-performance all-PSCs. 展开更多
关键词 all-polymer solar cells polymer acceptors planar heterojunction sequential deposition
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Facile preparation of organometallic perovskite films and high-efficiency solar cells using solid-state chemistry 被引量:3
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作者 Lei Chen Feng Tang +4 位作者 Yixin Wang Shan Gao Weiguo Cao Jinhua Cai Liwei Chen 《Nano Research》 SCIE EI CAS CSCD 2015年第1期263-270,共8页
The power conversion efficiency of organometallic perovskite-based solar cells has skyrocketed in recent years. Intensive efforts have been made to prepare high-quality perovskite films tailored to various device conf... The power conversion efficiency of organometallic perovskite-based solar cells has skyrocketed in recent years. Intensive efforts have been made to prepare high-quality perovskite films tailored to various device configurations. Planar heterojunction devices have achieved record efficiencies; however, the preparation of perovskite films for planar junction devices requires the use of expensive vacuum facilities and/or the fine control of experimental conditions. Here, we demonstrate a facile preparation of perovskite films using solid-state chemistry. Solid-state precursor thin films of CHBNH3I and PbI2 are brought into contact with each other and allowed to react via thermally accelerated diffusion. The resulting perovskite film displays good optical absorption and a smooth morphology. Solar cells based on these films show an average efficiency of 8.7% and a maximum efficiency of 10%. The solid-state synthesis of organometallic perovskite can also be carried out on flexible plastic substrates. Using this method on a PET/ITO substrate produces devices with an efficiency of 3.2%. Unlike existing synthetic methods for organometallic perovskite films, the solid-state reaction method does not require the use of orthogonal solvents or careful adjustment of reaction conditions, and thus shows good potential for mass production in the future. 展开更多
关键词 solid-state chemistry perovskite solar cells planar heterojunction flexible substrates
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Interface modification for organic and perovskite solar cells 被引量:1
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作者 王春花 阳军亮 《Science China Materials》 SCIE EI CSCD 2016年第9期743-756,共14页
Organic solar cells(OSCs) continuously attract much attention due to their potentials as the low-cost and lightweight sources of renewable energy,and the power conversion efficiency(PCE) of the state-of-the-art OSCs h... Organic solar cells(OSCs) continuously attract much attention due to their potentials as the low-cost and lightweight sources of renewable energy,and the power conversion efficiency(PCE) of the state-of-the-art OSCs has reached over 10.0%.Especially,there has been an unexpected breakthrough and rapid evolution of highly efficient organic-inorganic hybrid perovskite solar cells(PSCs),and the PCE has been improved to over 20%.The interface plays a very important role on the performance of both OSCs and PSCs,as well as their stability.It is imperative to control the interface properties and understand the mechanisms for obtaining highly efficient OSCs and PSCs.In this review,we will summarize our research progress on the interface modification of OSCs and PSCs using the electron transport layer and hole transport layer,as well as the molecular template layer. 展开更多
关键词 organic solar cells perovskite solar cells interface bulk heterojunction planar heterojunction.
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Subtle Alignment of Organic Semiconductors at the Donor/Acceptor Heterojunction Facilitates the Photoelectric Conversion Process
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作者 Yu-Xuan Liu Liang Wang +5 位作者 Ke Zhou Hong-Bo Wu Xiao-Bo Zhou Zai-Fei Ma Sheng-Wei Guo Wei Ma 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2022年第8期951-959,I0010,共10页
The aligned molecular packing structure is vital to the anisotropic charge transport in conjugated polymer and small molecule thin films.However,how this molecular packing motif influences the photoelectric conversion... The aligned molecular packing structure is vital to the anisotropic charge transport in conjugated polymer and small molecule thin films.However,how this molecular packing motif influences the photoelectric conversion process at the donor/acceptor heterojunction is still mysterious.Herein,we employed a PM6/Y6 bilayer model to investigate the long-range alignment of molecular packing induced photoelectric conversion process.Both PM6 and Y6 layers were properly controlled to exhibit the uniaxially oriented molecular packing compared to their as-cast counterparts,as revealed by the polarized absorption spectra and transmission electron microscopy.After analyzing the photovoltaic performance of bilayer devices,the smaller energy loss,lower energetic disorder,and longer charge carrier lifetime can be observed in the bilayer devices with aligned Y6 molecules,which contribute to a higher power conversion efficiency(PCE)than the as-cast devices.While the molecular packing structure of PM6 layer exhibited negligible influence on the device performance,probably resulting from the intrinsic semicrystalline nature of PM6 molecules.Our results indicate that the alignment of small molecular acceptor at the donor/acceptor interfaces should be a powerful strategy to facilitate the photoelectric conversion process,which will definitely pave the way to highly efficient bulk heterojunction photovoltaic device. 展开更多
关键词 Molecular packing Photoelectric conversion process planar heterojunction Organic solar cells
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