Tuning the Light Emission Properties by Band Gap Engineering in Hybrid Lead Halide Perovskite

被引：554

作者：

D'Innocenzo, Valerio ^{[1
,2
]}

Kandada, Ajay Ram Srimath ^{[1
]}

De Bastiani, Michele ^{[1
,3
]}

Gandini, Marina ^{[1
]}

Petrozza, Annamaria ^{[1
]}

机构：

[1] Ist Italian Tecnol, Ctr Nano Sci & Technol Polimi, I-20133 Milan, Italy

[2] Politecn Milan, Dipartimento Fis, I-20133 Milan, Italy

[3] Univ Padua, Dipartimento Sci Chim, I-35122 Padua, Italy

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2014年 / 136卷 / 51期

关键词：

IODIDE PEROVSKITE; RECOMBINATION; CH3NH3PBI3; EFFICIENCY; SEMICONDUCTOR; DEPENDENCE; DEPOSITION; LENGTHS; SIZE; TIN;

D O I：

10.1021/ja511198f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report about the relationship between the morphology and luminescence properties of methylammonium lead trihalide perovskite thin films. By tuning the average crystallite dimension in the film from tens of nanometers to a few micrometers, we are able to tune the optical band gap of the material along with its photoluminescence lifetime. We demonstrate that larger crystallites present smaller band gap and longer lifetime, which correlates to a smaller radiative bimolecular recombination coefficient. We also show that they present a higher optical gain, becoming preferred candidates for the realization of CW lasing devices.

引用

页码：17730 / 17733

页数：4

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