Organolead Halide Perovskite Nanocrystals: Branched Capping Ligands Control Crystal Size and Stability

被引：318

作者：

Luo, Binbin ^{[1
,2
]}

Pu, Ying-Chih ^{[4
]}

Lindley, Sarah A. ^{[1
]}

Yang, Yi ^{[1
]}

Lu, Liqiang ^{[1
,3
]}

Li, Yat ^{[1
]}

Li, Xueming ^{[2
]}

Zhang, Jin Z. ^{[1
]}

机构：

[1] Univ Calif Santa Cruz, Dept Chem & Biochem, Santa Cruz, CA 95064 USA

[2] Chongqing Univ, Dept Chem & Chem Engn, Chongqing 400044, Peoples R China

[3] China Univ Geosci, Fac Mat Sci & Chem, Wuhan, Peoples R China

[4] Natl Univ Tainan, Dept Mat Sci, Tainan 70005, Taiwan

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2016年 / 55卷 / 31期

关键词：

(3-aminopropyl)triethoxysilane (APTES); nanocrystals; nanocrystal stability; organolead halide perovskites; photoluminescence; QUANTUM DOTS; HIGH-PERFORMANCE; TEMPERATURE; PASSIVATION; DYNAMICS; GROWTH;

D O I：

10.1002/anie.201602236

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

CH3NH3PbBr3 perovskite nanocrystals (PNCs) of different sizes (ca. 2.5-100 nm) with high photoluminescence (PL) quantum yield (QY; ca. 15-55%) and product yield have been synthesized using the branched molecules, APTES and NH2-POSS, as capping ligands. These ligands are sterically hindered, resulting in a uniform size of PNCs. The different capping effects resulting from branched versus straight-chain capping ligands were compared and a possible mechanism proposed to explain the dissolution-precipitation process, which affects the growth and aggregation of PNCs, and thereby their overall stability. Unlike conventional PNCs capped with straight-chain ligands, APTES-capped PNCs show high stability in protic solvents as a result of the strong steric hindrance and propensity for hydrolysis of APTES, which prevent such molecules from reaching and reacting with the core of PNCs.

引用

页码：8864 / 8868

页数：5

共 34 条

[21] Recombination Kinetics in Organic-Inorganic Perovskites: Excitons, Free Charge, and Subgap States [J].