Fluorescent Alloy CsPbxMn1-x,I3 Perovskite Nanocrystals with High Structural and Optica Stability

被引:324
作者
Akkerman, Quinten A. [1 ,2 ]
Meggiolaro, Daniele [3 ,4 ]
Dang, Zhiya [1 ]
De Angelis, Filippo [3 ,4 ]
Manna, Liberato [1 ]
机构
[1] Ist Italiano Tecnol, Nanochem Dept, Via Morego 30, I-16163 Genoa, Italy
[2] Univ Genoa, Dipartimento Chim & Chim Ind, Via Dodecaneso 31, I-16146 Genoa, Italy
[3] CNR ISTM, Computat Lab Hybrid Organ Photovolta CLHYO, Via Elce Sotto 8, I-06123 Perugia, Italy
[4] Ist Italiano Tecnol, CompuNet D3, Via Morego 30, I-16163 Genoa, Italy
来源
ACS ENERGY LETTERS | 2017年 / 2卷 / 09期
关键词
LEAD HALIDE PEROVSKITES; CESIUM; PHASE; SUBSTITUTION; EMISSION; CSPBX3; BR; CL;
D O I
10.1021/acsenergylett.7b00707
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
CsPbI3 nanocrystals are still limited in their use because of their phase instability as they degrade into the yellow nonemitting delta-CsPbI3 phase within a few days. We show that alloyed CsPbxMN1-x,I-3 nanocrystals have essentially the same optical features and crystal structure as the parent a-CsPbI3 system, but they are stable in films and in solution for periods over a month. The stabilization stems from a small decrease in the lattice parameters slightly increasing the Goldsmith tolerance factor, combined with an increase in the cohesive energy. Finally, hybrid density functional calculations confirm that the Mn2+ levels fall within the conduction band, thus not strongly altering the optical properties.
引用
收藏
页码:2183 / 2186
页数:4
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