期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 55, 期 11, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1361-6463/ac3865
关键词
organo-inorganic perovskite; optical properties; roughness; DFT theory
资金
- Universidad Nacional del Litoral [CAI+D 2020 50620190100068LI]
- CONICET
- ANPCyT [PICT 2018 1614]
- ASACTEI, Government of the Province of Santa Fe, Argentina [AC-00010-18, Res.117/14]
In this study, we propose a simple and efficient method for characterizing the optical and morphological properties of perovskite films. This method provides qualitative and quantitative morphological information, and can help optimize film deposition.
Organo-inorganic perovskites (OIPs) have been intensively studied due to their potential application in low-cost, high-efficiency energy conversion in solar cells. Despite the great improvement in the quality of OIP films, wide dispersion in the same batch of perovskite-based devices remains an obstacle to obtaining highly reproducible results. For that reason, new and efficient strategies for testing deposition results is essential. Here we present a simple and efficient procedure for characterizing optical and morphological properties based on simultaneous reflectance and transmittance measurements under normal incidence over a methylammonium lead iodide film. The proposed method provides qualitative and quantitative morphological information associated with the film roughness as well as information about the position of the optical gap and possible contributions to optical dispersion in the structure that can be used as a simple diagnostic tool to optimize film deposition. Results are compared and validated with electronic and atomic force microscopy, as well as first-principles calculations.
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