Highly efficient Sb3+ emitters in 0D cesium indium chloride nanocrystals with switchable photoluminescence through water-triggered structural transformation

被引：109

作者：

Gong, Zhongliang ^{[1
]}

Zheng, Wei ^{[1
,2
]}

Huang, Ping ^{[1
,2
]}

Cheng, Xingwen ^{[1
]}

Zhang, Wen ^{[1
]}

Zhang, Meiran ^{[1
]}

Han, Siyuan ^{[1
]}

Chen, Xueyuan ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Fujian Inst Res Struct Matter, CAS Key Lab Design & Assembly Funct Nanostruct, Fujian Key Lab Nanomat,State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China

[2] Optoelect Informat China, Fujian Sci & Technol Innovat Lab, Fuzhou 350108, Fujian, Peoples R China

来源：

NANO TODAY | 2022年 / 44卷

基金：

中国博士后科学基金;

关键词：

Antimony; Metal halide; Luminescent nanocrystal; Excited-state dynamics; Structural transformation; DOUBLE PEROVSKITE; IMPURITY IONS; QUANTUM DOTS; LUMINESCENCE; EMISSION; SB-3+; RB3INCL6; PROGRESS; CENTERS; BLUE;

D O I：

10.1016/j.nantod.2022.101460

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

All-inorganic lead-free luminescent metal halide nanocrystals (NCs) have shown great promise in optoelectronics but their applications are limited by the low photoluminescence (PL) efficiency. Herein, we report a strategy via Sb3+ alloying to achieve highly emissive 0D In-based halide NCs and investigate the effect of NC size on the optical properties and excited-state dynamics of Sb3+. Owing to the strong electron-phonon coupling of Sb3+ in the spatially confined 0D structure of Cs3InCl6, Sb(3+ )ions experience a dynamic Jahn Teller distortion in the (3)P(1 )excited state and an off-center position in the 1S0 ground state, which results in intense broadband emission of Sb3+ from the inter-configurational P-3(1 )-> S-1(0) transition with a large Stokes shift and a high PL quantum yield (QY) of 52.3%. Furthermore, through an interfacial reaction with water, the green-emitting Cs3InCl6: Sb3+ NCs can be transformed into the orange-emitting Cs(2)InCl(5)middotH(2)O: Sb3+ NCs with a PLQY up to 75.3%. These findings reveal the unique advantage of the 5s(2)-metal Sb3+ luminescence in 0D metal halide NCs, thereby opening up a new avenue for exploring novel and versatile lead-free luminescent metal halide NCs through ns(2)-metal ion doping or alloying.(c) 2022 Elsevier Ltd. All rights reserved.

引用

页数：8

共 66 条

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