Tuning the structural, optical and photoluminescence properties of hybrid perovskite quantum dots by A-site doping

被引：13
作者：
Gallardo, Juan Jesus [1 ]
Blanco, Eduardo [2 ]
Sanchez-Coronilla, Antonio [3 ]
Pinero, Jose Carlos [4 ]
Navas, Javier [1 ,2 ,3 ,4 ]
机构：
[1] Univ Cadiz, Dept Quim Fis, Puerto Real 11510, Cadiz, Spain
[2] Univ Cadiz, Dept Fis Mat Condensada, Puerto Real 11510, Cadiz, Spain
[3] Univ Seville, Dept Quim Fis, Seville 41012, Spain
[4] Univ Cadiz, Dept Didact, Area Matemat, Puerto Real 11510, Cadiz, Spain
来源：
APPLIED MATERIALS TODAY | 2020年 / 18卷
关键词：
Perovskite; Quantum dots; Photoluminescence; Doping; Quantum yield; INITIO MOLECULAR-DYNAMICS; TOTAL-ENERGY CALCULATIONS; SOLAR-CELLS; HALIDE PEROVSKITES; NANOCRYSTALS; LUMINESCENT; STABILITY; BR; CL;
D O I：
10.1016/j.apmt.2019.100488
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Hybrid organic-inorganic perovskites have been widely investigated in recent years due to their role as light absorbers in highly efficient solar cells and as emitters. Consequently, to control the emission properties of perovskite quantum dots (PQDs) is of great interest. In this study, Cs(x)MA((1-x))PbI(3) PQDs were synthesized. A shift in the emission peak from 670 to 740 nm was found for x >= 0.2, and the quantum yield (QY) and recombination lifetime were affected when Cs was incorporated. The shift in the emission is observed to be due to the displacement of the valence band edge, but this is not because of an electronic effect resulting from the Cs incorporation, as observed from the PDOS analyses. It is likely due to the transition from tetragonal to orthorhombic phase of the PQDs when the Cs amount increased. Therefore, the emission properties of the PQDs synthesized can be regulated according to the amount of Cs incorporated in their network. (C) 2019 Elsevier Ltd. All rights reserved.
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页数：8
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