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Facile Bromination of Aromatic Ethers with Quaternary Ammonium Bromide and Iodosylbenzene
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作者 Jiang, YL Li, YC +3 位作者 Yang, BG Gao, DB Tan, JY Yuan, YC 《Chinese Chemical Letters》 SCIE CAS CSCD 1998年第1期7-9,共3页
Aromatic ethers were conveniently brominated with quaternary ammonium bromide and iodosylbenzene in glacial acetic acid under mild conditions to give the corresponding monobromo-aromatic ethers in nearly quantitative ... Aromatic ethers were conveniently brominated with quaternary ammonium bromide and iodosylbenzene in glacial acetic acid under mild conditions to give the corresponding monobromo-aromatic ethers in nearly quantitative yields. 展开更多
关键词 BROMINATION aromatic ether quaternary ammonium bromide IODOSYLBENZENE
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Reconfiguring perovskite interface via R4NBr addition reaction toward efficient and stable FAPbI3-based solar cells
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作者 Hongshi Li Zhenghao Liu +8 位作者 Zijing Chen Shan Tan Wenyan Zhao Yiming Li Jiangjian Shi Huijue Wu Yanhong Luo Dongmei Li Qingbo Meng 《Science China Chemistry》 SCIE EI CSCD 2022年第6期1185-1195,共11页
Defect states in perovskite films restrict the interfacial stability and open-circuit voltage of perovskite solar cells.Here,aiming at superior interfacial passivation,we investigate the reconfiguration of perovskite ... Defect states in perovskite films restrict the interfacial stability and open-circuit voltage of perovskite solar cells.Here,aiming at superior interfacial passivation,we investigate the reconfiguration of perovskite interface by the interaction between a series of quaternary ammonium bromides(QAB)and lead—halide(Pb—X)octahedrons.Bromide—iodide substitution reaction or R4NBr addition reaction may occur on the perovskite surface,which is related to the steric hindrance of quaternary ammonium cations.On this basis,the perovskite surface morphology,band structure,growth orientation and defect states are reconstructed via the R4NBr addition reaction.This ordered lead—halide adduct could effectively repair the imperfect perovskite/hole transportation layer interface to suppress non-radiative recombination and ion migration toward ultralong carrier lifetime surpassing 10µs.The resulting perovskite solar cells yield the efficiency of 23.89%with steady-state efficiency of 23.70%.The passivated cells can sustain 86%of initial efficiency after 200-h operation,which is attributed to the passivation effect and hydrophobic characteristics.This work provides an avenue for reconfiguring perovskite surface by QABs. 展开更多
关键词 perovskite solar cells addition reaction substitution reaction lead–halide adduct quaternary ammonium bromide INTERFACE stability
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