A novel dual optimization reagent enables ultra-bright and air-stable cesium copper iodine thin films

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2025-03-24 DOI:10.1016/j.optmat.2025.116984

Fushuai Li , Chuanhe Ma , Shu Li , Jinchun Jiang , Hailong Wang

引用次数: 0

Abstract

Cesium copper iodine (CsCuI) perovskite LED (PeLED) possesses several advantages, including eco-friendly, high stability, abundant elements, and low cost. Improving the photoluminescent performance and stability of the CsCuI perovskite thin film, which serves as the emissive layer, is crucial for enhancing the overall PeLED performance. This paper reports a dual optimization strategy (DOS) that uses a novel mixed toluene (Tol) and oleic acid (OA) reagent. Tol acts as an antisolvent, and OA serves as a passivator. Experimental results show that the DOS increases crystal nucleation rate and mitigates film defects. The photoluminescence quantum yield (PLQY) of the Cs₃Cu₂I₅ perovskite thin film prepared by DOS exceeds 90 %, and after 40 days of storing in air, the PLQY remains at the initial 88 %. This DOS, mixing antisolvent and passivator, also provides new ideas for improving other lead-free metal halide perovskites.

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.