journal article·2024-08-27

Blue Perovskite Lasing Derived from Bound Excitons through Defect Engineering

Guochao Lu, Xinyang Wang, Xinyi Jiang, Jing Li, Meiyi Zhu, Zichao Ma, Dingshuo Zhang, Yun Gao, Jun Pan, Xingliang Dai, Zhizhen Ye, Haiping He

ACS Nano· Volume 18· Issue 34
Publisher page

Abstract

All-inorganic perovskite films have emerged as promising candidates for laser gain materials owing to their outstanding optoelectronic properties and straightforward solution processing. However, the performance of blue perovskite lasing still lags far behind due to the inevitable high density of defects. Herein, we demonstrate that defects can be utilized instead of passivated/removed to form bound excitons to achieve excellent blue stimulated emission in perovskite films. Such a strategy emphasizes defect engineering by introducing a deep-level defect in mixed-Rb/Cs perovskite films through octylammonium bromide (OABr) additives. Consequently, the OA-Rb/Cs perovskite films exhibit blue amplified spontaneous emission (ASE) from defect-related bound excitons with a low threshold (13.5 μJ/cm 2 ) and a high optical gain (744.7 cm –1 ), which contribute to a vertical-cavity surface-emitting laser with single-mode blue emission at 482 nm. This work not only presents a facile method for creating blue laser gain materials but also provides valuable insights for further exploration of high-performance blue lasing in perovskite films.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Organic Light-Emitting Diodes Research · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering, State Key Laboratory of Silicon and Advanced Semiconductor Materials, Zhejiang University, Hangzhou 310027, P. R. China

College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China

Wenzhou Key Laboratory of Novel Optoelectronic and Nano Materials and Engineering Research Centre of Zhejiang Province, Institute of Wenzhou, Zhejiang University, Wenzhou 325006, P. R. China

Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan 030000, Shanxi, P. R. China

Wenzhou XINXINTAIJING Tech. Co. Ltd., Wenzhou 325006, P. R. China

Funding

China Association for Science and Technology · Key Research and Development Program of Zhejiang Province · National Natural Science Foundation of China · Natural Science Foundation of Zhejiang Province · Zhejiang University of Technology's Research Start-up Foundation · Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering · Leading Talent Entrepreneurship Project of Ouhai District in Wenzhou City

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