Light/Force-Sensitive 0D Lead-Free Perovskites: From Highly Efficient Blue Afterglow to White Phosphorescence with Near-Unity Quantum Efficiency

Shangwei Feng; Yujuan Ma; Shuaiqi Wang; Shanshan Gao; Qiuqin Huang; Hongyu Zhen; Dongpeng Yan; Qidan Ling; Zhenghuan Lin

doi:10.1002/anie.202116511

Light/Force-Sensitive 0D Lead-Free Perovskites: From Highly Efficient Blue Afterglow to White Phosphorescence with Near-Unity Quantum Efficiency

Angew Chem Int Ed Engl. 2022 Mar 7;61(11):e202116511. doi: 10.1002/anie.202116511. Epub 2022 Jan 27.

Authors

Shangwei Feng¹, Yujuan Ma², Shuaiqi Wang¹, Shanshan Gao¹, Qiuqin Huang¹, Hongyu Zhen¹, Dongpeng Yan², Qidan Ling¹, Zhenghuan Lin¹

Affiliations

¹ Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, China.
² Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, and Key Laboratory of Radiopharmaceuticals Ministry of Education, Beijing Normal University, Beijing, 100875, P. R. China.

PMID: 35015323
DOI: 10.1002/anie.202116511

Abstract

Herein, new types of zero-dimensional (0D) perovskites (PA6InCl9 and PA4InCl7) with blue room-temperature phosphorescence (RTP) were obtained from InCl₃ and aniline hydrochloride. These are highly sensitive to external light and force stimuli. The RTP quantum yield of PA6InCl9 can be enhanced from 25.2 % to 42.8 % upon illumination. Under mechanical force, PA4InCl7 exhibits a phase transform to PA6InCl9, thus boosting ultralong RTP with a lifetime up to 1.2 s. Furthermore, white and orange pure RTP with a quantum yield close to 100 % can be realized when Sb³⁺ was introduced into PA6InCl9. The white pure phosphorescence with a color-rendering index (CRI) close to 90 consists of blue RTP of PA6InCl9 and orange RTP of Sb³⁺ . Thus, this work not only overcomes long-standing problems of low quantum yield and short lifetime of blue RTP, but also obtains high-efficiency white RTP. It provides a feasible method to realize near-unity quantum efficiency and has great application potential in the fields of optical devices and smart materials.

Keywords: 0D; Afterglow; Luminescence; Perovskites; Room-Temperature Phosphorescence.

Abstract

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