2014年3月
Near-band-edge optical responses of solution-processed organic-inorganic hybrid perovskite CH3NH3PbI3 on mesoporous TiO2 electrodes
APPLIED PHYSICS EXPRESS
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- 巻
- 7
- 号
- 3
- 開始ページ
- 32302
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.7567/APEX.7.032302
- 出版者・発行元
- IOP PUBLISHING LTD
We studied the near-band-edge optical responses of solution-processed CH3NH3PbI3 on mesoporous TiO2 electrodes, which is utilized in mesoscopic heterojunction solar cells. Photoluminescence (PL) and PL excitation spectra peaks appear at 1.60 and 1.64 eV, respectively. The transient absorption spectrum shows a negative peak at 1.61 eV owing to photobleaching at the band-gap energy, indicating a direct band-gap semiconductor. On the basis of the temperature-dependent PL and diffuse reflectance spectra, we clarified that the absorption tail at room temperature is explained in terms of an Urbach tail and consistently determined the band-gap energy to be similar to 1.61 eV at room temperature. (C) 2014 The Japan Society of Applied Physics
- リンク情報
- ID情報
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- DOI : 10.7567/APEX.7.032302
- ISSN : 1882-0778
- eISSN : 1882-0786
- Web of Science ID : WOS:000336118000018