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Mixed-halide perovskite synthesis by chemical reaction and crystal nucleation under an optical potential

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Title: Mixed-halide perovskite synthesis by chemical reaction and crystal nucleation under an optical potential
Authors: Islam, Md Jahidul Browse this author
Yuyama, Ken-ichi Browse this author
Takahashi, Kiyonori Browse this author
Nakamura, Takayoshi Browse this author →KAKEN DB
Konishi, Katsuaki Browse this author
Biju, Vasudevanpillai Browse this author
Issue Date: 28-Jun-2019
Publisher: Nature Publishing Group
Journal Title: NPG Asia materials
Volume: 11
Start Page: 31
Publisher DOI: 10.1038/s41427-019-0131-0
Abstract: The development of new methods to engineer lead halide perovskite crystals with a controlled band gap and emission properties is an active subject in materials science and chemistry. We present the preparation of mixed-halide lead perovskites by spatially- and temporally- controlled chemical reactions and crystal growth under an optical potential in unsaturated precursor solutions. The crystals are characterized by transmission and photoluminescence spectral measurements and X-ray diffraction analysis. When compared with the spontaneous formation of multiple crystals in saturated precursor solutions, the optical potential creates large single crystals with a high chloride composition, providing distinct blue and green fluorescent crystals of chloride-bromide lead perovskites. We discuss the formation of mixed-halide perovskites from the viewpoints of an increased rate of chemical reaction via the formation and desolvation of precursor complexes and a decreased free energy potential.
Type: article
Appears in Collections:電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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