聚乙烯吡咯烷酮链段长度依赖的钙钛矿结晶动力学和电致发光研究

IF 0.6 4区物理与天体物理 Q4 OPTICS

光子学报 Pub Date : 2023-01-01 DOI:10.3788/gzxb20235208.0816001

陈文轩 CHEN Wenxuan, 何敏 HE Min, 陈平 CHEN Ping, 陈琪 CHEN Qi

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引用次数: 0

摘要

基于低温溶液工艺的钙钛矿发光二极管由于低成本，高色纯度，宽色域等优势受到广泛关注。然而，在溶液结晶成膜过程中，钙钛矿晶粒无规形核、快速生长，导致薄膜存在大量的针孔和缺陷，严重影响器件性能。本文通过原位荧光和结构表征技术证实，聚乙烯吡咯烷酮（PVP）添加剂在特定的链段长度下，能优化调控钙钛矿结晶动力学，延缓晶粒生长速度，使得钙钛矿薄膜粗糙度由1.489 nm降低到0.954 nm，缺陷密度从1.55×1018 cm-3降低至1.05×1018 cm-3。相应地，薄膜荧光量子产率从16.9%提升到58.9%，器件外量子效率从8.55%提高到了18.00%。本文通过原位表征技术，全方位解析了添加剂分子结构对钙钛矿结晶动力学的调控机理，为添加剂分子的优化设计提供了直观依据。

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聚乙烯吡咯烷酮链段长度依赖的钙钛矿结晶动力学和电致发光研究

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来源期刊

光子学报 OPTICS-

CiteScore

1.30

自引率

16.70%

发文量

11207

期刊介绍： Acta Photonica Sinica is a monthly journal which is sponsored and edited by The Chinese Optical Society, co-sponsored by Xi"an Institute of Optics and Precision Mechanics, CAS, and published by Science Press. It mainly publishes the academic thesis, the research note, the research letter on Photonics. The contents of the Acta deal with Optics, particularly, Transient Optics, Optoelectronics, Integrated Optics, Information Optics, Guided Wave Optics, Nonlinear Optics, Photo-Biology, Optical Communication, Optical Sensing, Optical Computing, Optical Neural Network, High Speed Photography, Intellectualized Optical Instrument, Photon Function Materials, Interaction between Photons, Classical and Nonclassical effects of Photons, etc.