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ICCAS OpenIR  > 分子纳米结构与纳米技术实验室  > 期刊论文
题名: Microscopic Investigation of Grain Boundaries in Organolead Halide Perovskite Solar Cells
作者: Li, Jiang-Jun1; Ma, Jing-Yuan1; Ge, Qian-Qing1; Hu, Jin-Song1; Wang, Dong1; Wan, Li-Jun1
关键词: perovskite solar cells ; GBs ; KPFM ; c-AFM ; CPD ; photocurrent
刊名: ACS APPLIED MATERIALS & INTERFACES
发表日期: 2015-12-30
卷: 7, 期:51, 页:28518-28523
收录类别: SCI
英文摘要: Grain boundaries (GBs) play an important role in organic inorganic halide perovskite solar cells, which have generally been recognized as a new class of materials for photovoltaic applications. To definitely understand the electrical structure and behavior of GBs, here we present Kelvin probe force microscopy and conductive atomic force microscopy (cAFM) measurements of both typical and inverted planar organolead halide perovskite solar cells. By comparing the contact potential difference (CPD) of these two devices in the dark and under illumination, we found that a downward band bending exists in GBs that predominantly attract photoinduced electrons. The c-AFM measurements observed that higher photocurrents flow through GBs when a low bias overcomes the barrier created by the band bending, indicating that GBs act as effective charge dissociation interfaces and photocurrent transduction pathways rather than recombination sites.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35799
Appears in Collections:分子纳米结构与纳米技术实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Chem, Key Lab Mol Nanostruct & Nanotechnol, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
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