Review
Chemistry, Multidisciplinary
Junwei Liu, Kaihu Xian, Long Ye, Zhihua Zhou
Summary: Lead chalcogenide colloidal quantum dot solar cells show excellent performance but face challenges in reducing open-circuit voltage loss, with research focusing on exploring strategies to decrease V-oc losses and achieve higher conversion efficiencies.
ADVANCED MATERIALS
(2021)
Article
Energy & Fuels
Yue Yu, Rui Liu, Chang Liu, Tian Hou, Qiaofeng Wu, Meng Zhang, Hua Yu
Summary: This study proposes a passivation strategy of 2D/3D heterostructures to improve the conductivity and stability of wide-bandgap perovskite solar cells (PSCs), achieving high open-circuit voltage. This approach enhances the oriented transport of carriers and reduces nonradiative recombination, leading to high-performance and stable PSCs.
Article
Chemistry, Multidisciplinary
Hongling Guan, Wenjun Zhang, Jiwei Liang, Chen Wang, Xuzhi Hu, Dexing Pu, Lishuai Huang, Yansong Ge, Hongsheng Cui, Yuanrong Zou, Guojia Fang, Weijun Ke
Summary: A post-treatment strategy is proposed to form a 2D top layer on wide-bandgap perovskite solar cells, which effectively passivates defects and suppresses phase segregation. The resulting perovskite solar cells with a 1.66 eV-bandgap achieve high power conversion efficiencies and show promise for multi-junction tandem solar cell applications.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Zhifa Liu, Johanna Siekmann, Benjamin Klingebiel, Uwe Rau, Thomas Kirchartz
Summary: Efforts to improve the efficiency of wide bandgap perovskite solar cells include minimizing nonradiative recombination pathways, optimizing interfaces and energy level alignment, as well as tuning the molecular orbitals of electron transport layers. By optimizing these factors, higher open-circuit voltages and power conversion efficiencies can be achieved.
ADVANCED ENERGY MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Jie Zhao, Anthony S. R. Chesman, Junlin Yan, Luke J. Sutherland, Jacek Jasieniak, Jianfeng Lu, Wenxin Mao, Udo Bach
Summary: This study investigates the improvement of the quality of wide-bandgap (WBG) perovskite FA0.83Cs0.17Pb-(I0.8Br0.2)3 by incorporating lead chloride (PbCl2) into a lead acetate (PbAc2)-based precursor, resulting in enlarged grain sizes and improved crystallinity. The enhanced film quality leads to the suppression of nonradiative recombination and a reduction in defect density. Efficient WBG perovskite solar cells (1.66 eV) with an efficiency of 19.3% and a high Voc of 1.22 V were fabricated using a facile one-step spin-coating method without the need for an antisolvent. Notably, the unencapsulated devices retained 90% of their initial power conversion efficiency after storage in a dry box (10% humidity) for 800 h.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Luis Huerta Hernandez, Md Azimul Haque, Anirudh Sharma, Luis Lanzetta, Jules Bertrandie, Aren Yazmaciyan, Joel Troughton, Derya Baran
Summary: The efficiency of tin-lead perovskite solar cells (TLPSC) has been consistently increasing, but their photostability remains a challenge. This study investigates the influence of methylammonium (MA) and cesium (Cs) on the photostability and performance of TLPSCs. The results show that the addition of MA improves device efficiency but reduces photostability.
SUSTAINABLE ENERGY & FUELS
(2022)
Article
Engineering, Environmental
Huifen Xu, Zheng Liang, Jiajiu Ye, Shendong Xu, Zihan Wang, Liangzheng Zhu, Xiaojing Chen, Zhengguo Xiao, Xu Pan, Guozhen Liu
Summary: Researchers improved the performance of FAPbBr3-based solar cells by introducing guanidinium bromide (GABr) to modulate crystallization and heal charged defects. This resulted in higher photovoltaic efficiency and open-circuit voltage.
CHEMICAL ENGINEERING JOURNAL
(2022)
Review
Energy & Fuels
Liam Gollino, Thierry Pauporte
Summary: The rise and commercialization of perovskite solar cells are hindered by the toxicity of lead present in the perovskites as the solar light absorber. To counter this problem, lead can be fully (lead-free) or partially (lead-less) replaced by diverse elements, with partial replacement showing more promising results. Various methods to reduce the lead content in PSCs are discussed, including the partial replacement of lead by elements like Sn, Ge, Sr, and other transition metals. In addition, new families of perovskites based on the insertion of organic cations to replace lead and halogen units are presented, as well as atypical ways to reduce toxicity such as optimizing photon collection and using recycled lead.
Article
Energy & Fuels
Wolfgang Tress, Maximilian T. Sirtl
Summary: Cs2AgBiBr6 double perovskites show high potential in solar cells, but major changes in absorption onset are needed to achieve higher efficiency. This material poses various scientific questions, and exact recombination and charge transport processes are yet to be unraveled, preparing us for the development of double perovskite or perovskite-like materials.
Article
Energy & Fuels
Nathan Daem, Jennifer Dewalque, Felix Lang, Anthony Maho, Gilles Spronck, Catherine Henrist, Pierre Colson, Samuel D. Stranks, Rudi Cloots
Summary: This study reports the deposition of Cs2AgBiBr6 double perovskite thin films using spray processing for the first time, comparing their properties with spin-coated benchmark films. Incorporating spray-coated Cs2AgBiBr6 thin films in solar cells achieved a photoconversion efficiency of 2.3% with high open-circuit voltage. The study highlights the suitability of ultrasonic spray deposition for optimizing Cs2AgBiBr6 solar cells in terms of light absorption and charge transfer.
Article
Chemistry, Multidisciplinary
Hongling Guan, Shun Zhou, Shiqiang Fu, Dexin Pu, Xuepeng Chen, Yansong Ge, Shuxin Wang, Chen Wang, Hongsen Cui, Jiwei Liang, Xuzhi Hu, Weiwei Meng, Guojia Fang, Weijun Ke
Summary: In this study, a crystal orientation regulation strategy by introducing dodecyl-benzene-sulfonic-acid as an additive in perovskite precursors is proposed to address the challenges faced by wide-bandgap (WBG) perovskite solar cells, including substantial open-circuit voltage (VOC) deficit and severe photo-induced halide segregation. The proposed method promotes the desired crystal orientation, passivates defects, and mitigates photo-induced halide phase segregation, leading to reduced nonradiative recombination, minimized VOC deficits, and enhanced operational stability of the devices. The resulting methylamine-free perovskite solar cells achieve impressive power conversion efficiencies (PCEs) of 22.40% and 20.13% for opaque and semitransparent devices, respectively. Furthermore, four-terminal tandem cells comprising WBG perovskite top cells and lower bandgap perovskite bottom cells showcase a remarkable PCE of 28.06%.
ADVANCED MATERIALS
(2023)
Review
Materials Science, Multidisciplinary
Pengfei Wu, Shirong Wang, Xianggao Li, Fei Zhang
Summary: This review discusses the lead toxicity issue in perovskite solar cells and provides guidelines for designing encapsulation structures and lead-absorbing materials. The review highlights the hazardous effects of lead toxicity, strategies for preventing lead leakages, and summarizes the current challenges and future opportunities.
Article
Energy & Fuels
Fuxiang Ji, Gerrit Boschloo, Feng Wang, Feng Gao
Summary: Lead-free halide double perovskites (HDPs) are attractive alternatives to address the toxicity issue in lead-based halide perovskites (APbX(3)). HDPs exhibit excellent stability, diverse combinations, and appealing optoelectronic features. However, the power conversion efficiency of HDP solar cells still lags behind that of lead-based counterparts. This review focuses on HDPs with intriguing electronic and optical properties, analyzes the current challenges in material properties and device fabrication, and highlights promising approaches to overcome these limitations.
Review
Chemistry, Multidisciplinary
Jiupeng Cao, Feng Yan
Summary: Organic-inorganic halide perovskite solar cells have shown high efficiency, but many contain toxic lead. Tin-based perovskites are a promising alternative, with the highest efficiency over 13%. This review discusses device design, physical properties, challenges, film preparation techniques, and chemical substitutions to improve the optoelectronic properties of tin-based perovskites and reduce lead content for high-performance and environmentally friendly PSCs.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Physics, Applied
Andreas Pusch, Stephen P. Bremner, Murad J. Y. Tayebjee, Nicholas J. Ekins Daukes
Summary: Efficiency limits of multiple exciton generation (MEG) solar cells need to consider Auger recombination, challenging the assumption of effective separation of timescales in traditional quasi-equilibrium models. A non-equilibrium model can offer more accurate assessment of MEG solar cell performance by taking into account Auger recombination impact.
APPLIED PHYSICS LETTERS
(2021)
Review
Materials Science, Multidisciplinary
Lianzheng Hao, Qiangqiang Zhao, Xiao Wang, Shuping Pang, Guanglei Cui
Summary: This article summarizes the challenges of fabricating large-scale perovskite films for commercialization of perovskite solar cells (PSCs) and the research progress on the MA(0) healing method, focusing on the interactions and dynamic mechanisms during the liquification process.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Energy & Fuels
Zhipeng Li, Lianzheng Hao, Dachang Liu, Xiuhong Sun, Qiangqiang Zhao, Zhipeng Shao, Chen Chen, Xiao Wang, Li Wang, Guanglei Cui, Shuping Pang
Summary: This study systematically investigates the effect of guanidinium cation doping on the performance of perovskite solar cells, and finds that partial guanidinium cation doping can effectively suppress iodide ion migration, improving the efficiency and stability of the solar cells.
Article
Chemistry, Physical
Xiuhong Sun, Zhipeng Shao, Zhipeng Li, Dachang Liu, Caiyun Gao, Chen Chen, Bingqian Zhang, Lianzheng Hao, Qiangqiang Zhao, Yimeng Li, Xianzhao Wang, Yue Lu, Xiao Wang, Guanglei Cui, Shuping Pang
Summary: In this study, the open-circuit voltage of Cs-based perovskite solar cells was significantly enhanced by constructing a CsPbI3/Cs(1-x)DMA(x)PbI(3) bulk heterojunction structure, leading to improved charge separation and collection efficiency as well as reduced carrier recombination loss. This research suggests that junction engineering could be a new strategy for efficient perovskite devices.
Article
Multidisciplinary Sciences
Zhipeng Li, Xiao Wang, Zaiwei Wang, Zhipeng Shao, Lianzheng Hao, Yi Rao, Chen Chen, Dachang Liu, Qiangqiang Zhao, Xiuhong Sun, Caiyun Gao, Bingqian Zhang, Xianzhao Wang, Li Wang, Guanglei Cui, Shuping Pang
Summary: This study investigates the role of transamination reactions in the degradation mechanism of formamidinium-containing perovskites in an aliphatic amines environment. Ammonia is selected as a post-healing gas to facilitate the formation of highly uniform and compact formamidinium-based perovskite films. Low temperature is crucial in achieving a liquid intermediate state and eliminating voids in the raw films. The champion perovskite solar cell achieved a power conversion efficiency of 23.21% with excellent reproducibility.
NATURE COMMUNICATIONS
(2022)
Article
Energy & Fuels
Dachang Liu, Qiangqiang Zhao, Zhipeng Li, Xiuhong Sun, Bingqian Zhang, Zhipeng Shao, Chen Chen, Lianzheng Hao, Xianzhao Wang, Caiyun Gao, Yimeng Li, Xiao Wang, Guanglei Cui, Shuping Pang
Summary: By regulating the composition of perovskite materials, especially the co-doping of A-site cations, the efficiency and stability of organic-inorganic hybrid perovskite solar cells can be significantly improved.
Article
Engineering, Environmental
Qiangqiang Zhao, Dachang Liu, Zhipeng Li, Bingqian Zhang, Xiuhong Sun, Zhipeng Shao, Chen Chen, Xiao Wang, Lianzheng Hao, Xianzhao Wang, Caiyun Gao, Yimeng Li, Panyu Chen, Xiaoxu Zhang, Shuping Pang, Guanglei Cui, Li Wang
Summary: The optimized chemical bath deposition method is used to achieve low-temperature in-situ deposition of mesoporous SnO2 layer on FTO substrates. This leads to an increase in power conversion efficiency and stability of perovskite solar cells.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Bingqian Zhang, Chen Chen, Xianzhao Wang, Xiaofan Du, Dachang Liu, Xiuhong Sun, Zhipeng Li, Lianzheng Hao, Caiyun Gao, Yimeng Li, Zhipeng Shao, Xiao Wang, Guanglei Cui, Shuping Pang
Summary: A random polymer was synthesized as an interfacial passivation layer to enhance the open-circuit voltage and stability of perovskite solar cells.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Environmental
Xianzhao Wang, Qiangqiang Zhao, Zhipeng Li, Dachang Liu, Chen Chen, Bingqian Zhang, Xiuhong Sun, Xiaofan Du, Lianzheng Hao, Caiyun Gao, Yimeng Li, Sui Mao, Zhipeng Shao, Xiao Wang, Guanglei Cui, Shuping Pang
Summary: The loss of iodine in the perovskite layer is a major limitation for improving the power conversion efficiency and long-term stability of perovskite solar cells. This study systematically investigates the interaction between the bifunctional amide group and the perovskite layer, finding that it can effectively immobilize iodine and passivate undercoordinated lead cations, leading to improved efficiency and stability of perovskite solar cells.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Dachang Liu, Xiao Wang, Xianzhao Wang, Bingqian Zhang, Xiuhong Sun, Zhipeng Li, Zhipeng Shao, Sui Mao, Li Wang, Guanglei Cui, Shuping Pang
Summary: In this study, different polymerization strategies were used to construct three-dimensional passivation frameworks in the perovskite layer, which reduced the defect state density and increased the carrier diffusion length. The reduction of iodine vacancies changed the Fermi level of the perovskite layer and improved the energy level alignment and carrier injection efficiency. As a result, the optimized device achieved an efficiency exceeding 24% with a high open-circuit voltage of 1.194 V, and the corresponding module achieved an efficiency of 21.55%.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Xiaoqing Jiang, Guangyue Yang, Bingqian Zhang, Linqin Wang, Yanfeng Yin, Fengshan Zhang, Shitao Yu, Shiwei Liu, Hongkai Bu, Zhongmin Zhou, Licheng Sun, Shuping Pang, Xin Guo
Summary: Introducing fluorine (F) groups into a passivator is important for enhancing the defect passivation effect in perovskite films. However, the interaction between fluorine and electron-rich passivation groups in the same molecule is often overlooked. This study shows that such interactions can affect the coordination of passivation groups with defect sites, leading to different passivation abilities. By comparing two fluorinated molecules, heptafluorobutylamine (HFBM) and heptafluorobutyric acid (HFBA), it is found that HFBM has weaker passivation ability due to the stronger interaction between F and -NH2 compared to HFBA's F and -COOH interaction. Perovskite solar cells and modules based on HFBA exhibit high efficiencies and long-term stability.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
