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

被引：30

作者：

Islam, Md Jahidul ^{[1
]}

Yuyama, Ken-ichi ^{[1
,2
]}

Takahashi, Kiyonori ^{[1
,2
]}

Nakamura, Takayoshi ^{[1
,2
]}

Konishi, Katsuaki ^{[1
,3
]}

Biju, Vasudevanpillai ^{[1
,2
]}

机构：

[1] Hokkaido Univ, Grad Sch Environm Sci, North Ward, N10W5, Sapporo, Hokkaido 0600810, Japan

[2] Hokkaido Univ, Res Inst Elect Sci, North Ward, N10W5, Sapporo, Hokkaido 0010020, Japan

[3] Hokkaido Univ, Fac Environm Earth Sci, North Ward, N10W5, Sapporo, Hokkaido 0600810, Japan

来源：

NPG ASIA MATERIALS | 2019年 / 11卷 / 1期

关键词：

PHASE SEGREGATION; HYBRID PEROVSKITE; SINGLE-CRYSTALS; GROWTH; MANIPULATION; CRYSTALLIZATION; TEMPERATURE; PRESSURE; BEAM;

D O I：

10.1038/s41427-019-0131-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：7

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