open access

https://hdl.handle.net/2115/84015

Heterojunction Perovskite Microrods Prepared by Remote‐Controlled Vacancy Filling and Halide Exchange

英語

vacancy filling

2021-02

John Wiley & Sons

Advanced Materials Technologies

6(2)

2000934

Anion exchange reaction tunes the band gap of halide perovskites, which proceeds by the migration of the ions through the halide vacancies. This study reports the preparation of the heterojunction perovskite microrods by optically controlled localized halide vacancy filling, and halide exchange leading to color tuning in the MAPbBr(3) microrod crystals. The exchange reaction is homogeneously suppressed by treating the crystal with a halide precursor solution, whereas the reaction is locally inhibited at the specific site of a crystal by filling the halide vacancies using a tightly focused beam of a near-infrared laser. By controlling the density of halide vacancies at the specific site of the crystal, the rate of nonradiative recombination of charge carriers in the crystal is controlled. This halide vacancy filling by the remote-controlled reaction helps to locally control the crystal quality and photoluminescence for designing perovskite-based high-quality photovoltaic and optoelectronic devices.

学術雑誌論文

Accepted Manuscript

This is the peer reviewed version of the following article: Shahjahan, M., Yuyama, K.‐i., Okamoto, T., Biju, V., Heterojunction Perovskite Microrods Prepared by Remote‐Controlled Vacancy Filling and Halide Exchange. Adv. Mater. Technol. 2021, 6, 2000934, which has been published in final form at https://doi.org/10.1002/admt.202000934 . This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.

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