Challenges in the ambient Raman spectroscopy characterization of methylammonium lead triiodide perovskite thin films
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- 作者：Yuanyuan Zhou ; Hector F. Garces ; Nitin P. Padture
- 关键词：perovskite ; solar cells ; Raman spectroscopy ; laser ; degradation
- 刊名：Frontiers of Optoelectronics in China
- 出版年：2016
- 出版时间：March 2016
- 年：2016
- 卷：9
- 期：1
- 页码：81-86
- 全文大小：1,429 KB
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Hector F. Garces (1)
Nitin P. Padture (1)
1. School of Engineering, Brown University, Providence, RI, 02912, USA - 刊物类别：Engineering
- 刊物主题：Electronic and Computer Engineering
Electromagnetism, Optics and Lasers
Biomedical Engineering
Chinese Library of Science - 出版者：Higher Education Press, co-published with Springer-Verlag GmbH
- ISSN：2095-2767
文摘
The importance of methylammonium lead triiodide (CH3NH3PbI3 or MAPbI3) organic-inorganic hybrid perovskites has shot up dramatically since their use in highly efficient thin-film perovskite solar cells (PSCs). However, the basic structural characterization of these fascinating materials remains sparse. In particular, Raman spectroscopy, which is a powerful vibrational spectroscopy characterization tool and complements other characterization methods, of MAPbI3 under ambient conditions is plagued with difficulties. Here, a systematic ambient Raman spectroscopy characterization study of MAPbI3 thin films is conducted under different conditions (excitation laser wavelength, integration time, filter characteristic). The results from this study help elucidate the possible sources of artifacts in the Raman spectra, and raise the awareness of the challenges in the ambient Raman spectroscopy of MAPbI3 perovskites. Approaches to overcome these challenges are suggested.