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题名: Controlled Substitution of Chlorine for Iodine in Single-Crystal Nanofibers of Mixed Perovskite MAPbI(3-x)Cl(x)
作者: Zhang, Haihua1; Liao, Qing1; Wang, Xuedong2; Hu, Ke1; Yao, Jiannian1, 2; Fu, Hongbing1, 2, 3
刊名: SMALL
发表日期: 2016-07-27
卷: 12, 期:28, 页:3780-3787
收录类别: SCI
英文摘要: Longer carrier diffusion length and improved power conversion efficiency have been reported for thin-film solar cell of organolead mixed-halide perovskite MAPbI(3-x)Cl(x) in comparison with MAPbI(3). Instead of substituting I in the MAPbI(3) lattice, Cl-incorporation has been shown to mainly improve the film morphology of perovskite absorber. Well-defined crystal structure, adjustable composition (x), and regular morphology, remains a formidable task. Herein, a facile solution-assembly method is reported for synthesizing single-crystalline nanofibers (NFs) of tetragonal-lattice MAPbI(3-x)Cl(x) with the Cl-content adjustable between 0 <= x <= 0.75, leading to a gradual blueshift of the absorption and photoluminescence maxima from x = 0 to 0.75. The photoresponsivity (R) of MAPbI(3) NFs keeps almost unchanging at a value independent of the white-light illumination intensity (P). In contrast, R of MAPbI(3-x)Cl(x) NFs decreases rapidly with increasing both the x and P values, indicating Cl-substitution increases the recombination traps of photogenerated free electrons and holes. This study provides a model system to examine the role of extrinsic Cl ions in both perovskite crystallography and optoelectronic properties.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35318
Appears in Collections:光化学实验室_期刊论文

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作者单位: 1.Capital Normal Univ, Dept Chem, Beijing Key Lab Opt Mat & Photon Devices, Beijing 100048, Peoples R China
2.Chinese Acad Sci, Inst Chem, BNLMS, Beijing 100190, Peoples R China
3.Tianjin Univ, Dept Chem, Tianjin Key Lab Mol Optoelect Sci, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China
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