Room-Temperature Doping of CsPbBr3 Nanocrystals with Aluminum

被引：10

作者：

Duong, Tuan M. ^{[1
]}

Aldakov, Dmitry ^{[1
]}

Pouget, Stephanie ^{[2
]}

Ling, Wai Li ^{[3
]}

Dang, Le Si ^{[4
]}

Nogues, Gilles ^{[4
]}

Reiss, Peter ^{[1
]}

机构：

[1] Univ Grenoble Alpes, CEA, CNRS, IRIG,SyMMES,STEP, F-38000 Grenoble, France

[2] Univ Grenoble Alpes, CEA, IRIG, MEM,SGX, F-38000 Grenoble, France

[3] Univ Grenoble Alpes, CEA, CNRS, IBS, F-38000 Grenoble, France

[4] Univ Grenoble Alpes, CNRS, Inst Neel, F-38000 Grenoble, France

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2022年 / 13卷 / 20期

关键词：

HALIDE PEROVSKITE NANOCRYSTALS; INDUCED PHASE SEGREGATION; DEPENDENT PHOTOLUMINESCENCE; OPTICAL-PROPERTIES; QUANTUM DOTS; SPECTRA; IMPACT;

D O I：

10.1021/acs.jpclett.2c01021

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

B-site doping is an emerging strategy for tuning the emission wavelength of cesium lead halide ABX(3) nanocrystals. We present a simple method for the postsynthetic doping of CsPbBr3 nanocrystals with aluminum at room temperature by exposing them to a solution of AlBr3 in dibromomethane. Despite the much smaller ionic radius of Al3+ compared to that of Pb2+, nominal doping levels in a range from 8.1% to 24.3% were obtained when increasing the Al/Pb feed ratio from 1 to 4.5. Al3+ introduction leads to a hypsochromic shift of the photoluminescence (PL) emission of the CsPbBr3 nanocrystals. The PL peak position is highly stable over at least 6 months and tunable in a range of 510 to 480 nm by increasing the doping level. Structural analyses revealed a linear correlation between the PL energy and the lattice parameter with a slope of -1.96 eV/A.

引用

页码：4495 / 4500

页数：6

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