Journal ArticleDOI
Stable 24.29%‐Efficiency FA0.85MA0.15PbI3 Perovskite Solar Cells Enabled by Methyl Haloacetate‐Lead Dimer Complex
S. Zhan,Yuwei Duan,Zhike Liu,Lüjie Yang,Kun He,Yuhang Che,Wenjing Zhao,Yu Han,Shaomin Yang,Guangtao Zhao,Ningyi Yuan,Jianning Ding,Shengzhong Frank Liu +12 more
TLDR
In this article , a bifunctional passivator, methyl haloacetate (methyl chloroacetate, (MClA), methyl bromoacetates (MBrA)), is designed to reduce defect density, to tune the energy levels and to improve interfacial charge extraction in the FAMAPbI3 perovskite cell by synergistic passivation of both C�O groups and halogen anions.Abstract:
Formamidinium methylammonium lead iodide (FAMAPbI3) perovskite has been intensively investigated as a potential photovoltaic material because it has higher phase stability than its pure FAPbI3 perovskite counterpart. However, its power conversion efficiency (PCE) is significantly inferior due to its high density of surface detects and mismatched energy level with electrodes. Herein, a bifunctional passivator, methyl haloacetate (methyl chloroacetate, (MClA), methyl bromoacetate (MBrA)), is designed to reduce defect density, to tune the energy levels and to improve interfacial charge extraction in the FAMAPbI3 perovskite cell by synergistic passivation of both CO groups and halogen anions. As predicted by modeling undercoordinated Pb2+, the MBrA shows a very strong interaction with Pb2+ by forming a dimer complex ([C6H10Br2O4Pb]2+), which effectively reduces the defect density of the perovskite and suppresses non‐radiative recombination. Meanwhile, the Br− in MBrA passivates iodine‐deficient defects. Consequently, the MBrA‐modified device presents an excellent PCE of 24.29%, an open‐circuit voltage (Voc) of 1.18 V (Voc loss ≈ 0.38 V), which is one of the highest PCEs among all FAMAPbI3‐based perovskite solar cells reported to date. Furthermore, the MBrA‐modified devices without any encapsulation exhibit remarkable long‐term stability with only 9% of PCE loss after exposure to ambient air for 1440 h.read more
Citations
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Journal ArticleDOI
Rationalization of passivation strategies toward high-performance perovskite solar cells.
TL;DR: In this article , the authors classify and review both well-established and burgeoning passivation strategies to provide further guidance for the passivation protocols in PSCs, including chemical passivation to eliminate defects by the formation of chemical bonds, physical passivation by strain relaxation or physical treatments, energetic passivation, and field effect passivation (FE) to regulate the interfacial carrier behavior.
Journal ArticleDOI
25.24%‐Efficiency FACsPbI3 Perovskite Solar Cells Enabled by Intermolecular Esterification Reaction of DL‐Carnitine Hydrochloride
Lüjie Yang,Hui Zhou,Yuwei Duan,Meizi Wu,Kun He,Yong Fang Li,Dongfang Xu,Hong Zou,Shaomin Yang,Zhimin Fang,Shengzhong Frank Liu,Zhike Liu +11 more
TL;DR: In this paper , a DL−carnitine hydrochloride (DL) is incorporated into the perovskite/snO2 interface to suppress the defect-state density.
Journal ArticleDOI
Enhancing the stability of planar perovskite solar cells by green and inexpensive cellulose acetate butyrate
TL;DR: In this article , an ecofriendly and low-cost organic polymer, cellulose acetate butyrate (CAB), was introduced to the grain boundaries and surfaces of perovskite, resulting in a high quality and low defect perovsite film with a nearly tenfold improvement in carrier lifetime.
Journal ArticleDOI
24.20%-Efficiency MA-Free Perovskite Solar Cells Enabled by Siloxane Derivative Interface Engineering.
TL;DR: In this article , a siloxane derivative diethylphosphatoethylsilicic acid (PSiOH) was developed to modify the interface of TiO2 ETL/FA 0.83 Cs 0.17 PbI3 perovskite.
Journal ArticleDOI
Revealing Superoxide-Induced Degradation in Lead-free Tin Perovskite Solar Cells
Zhihao Zhang,Xuesong Tian,Can Wang,Jialun Jin,Yiting Jiang,Qin Zhou,Jingwei Zhu,Jianbin Xu,Rui He,Yuangfang Huang,Sheng Ren,Cong Chen,Peng Gao,Run Long,Dewei Zhao +14 more
TL;DR: The poor stability of lead (Pb)-free tin-based perovskites under only oxygen (O2) condition has attracted extensive research, while their stability under simultaneous light and O2 conditions is unexplored as discussed by the authors .
References
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Journal ArticleDOI
Organometal Halide Perovskites as Visible-Light Sensitizers for Photovoltaic Cells
TL;DR: Two organolead halide perovskite nanocrystals were found to efficiently sensitize TiO(2) for visible-light conversion in photoelectrochemical cells, which exhibit strong band-gap absorptions as semiconductors.
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Organic-inorganic hybrid materials as semiconducting channels in thin-film field-effect transistors
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Journal ArticleDOI
Pseudo-halide anion engineering for α-FAPbI3 perovskite solar cells.
Jaeki Jeong,Jaeki Jeong,Minjin Kim,Jongdeuk Seo,Haizhou Lu,Paramvir Ahlawat,Aditya Mishra,Yingguo Yang,Michael A. Hope,Felix Eickemeyer,Maengsuk Kim,Yung Jin Yoon,In Woo Choi,Barbara Primera Darwich,Seung Ju Choi,Yimhyun Jo,Jun Hee Lee,Bright Walker,Shaik M. Zakeeruddin,Lyndon Emsley,Ursula Rothlisberger,Anders Hagfeldt,Anders Hagfeldt,Dong Suk Kim,Michael Grätzel,Jin Young Kim +25 more
TL;DR: In this paper, the pseudo-halide anion formate (HCOO−) was used to suppress anion-vacancy defects that are present at grain boundaries and at the surface of the perovskite films.
Journal ArticleDOI
Efficient perovskite solar cells via improved carrier management
Jason J. Yoo,Gabkyung Seo,Matthew R. Chua,Tae Gwan Park,Yongli Lu,Fabian Rotermund,Young-Ki Kim,Chan Su Moon,Nam Joong Jeon,Juan-Pablo Correa-Baena,Vladimir Bulovic,Seong Sik Shin,Moungi G. Bawendi,Jangwon Seo +13 more
TL;DR: In this paper, an electron transport layer with an ideal film coverage, thickness and composition was developed by tuning the chemical bath deposition of tin dioxide (SnO2) to improve the performance of metal halide perovskite solar cells.