题目： | Ultrastable and Reversible Fluorescent Perovskite Films Used for Flexible Instantaneous Display |
作者： | Yeshu Tan, Ruiying Li, Hao Xu, Yuanshuai Qin, Tao Song,* and Baoquan Sun* |
单位： | Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou 215123, P. R. China |
摘要： | All-inorganic halide perovskite materials have been regarded as promising materials in information display application owing to their tunable color, narrow emission peak and easy processability. However, the photoluminescence (PL) stability of halide perovskite film is still inferior due to their poor thermal stability and hygroscopic property. Herein, all-inorganic perovskite films are prepared through vacuum thermal deposition method to enhance its thermal and hygroscopic stability. By intentionally adding extra bromide source, a structure of CsPbBr3 nanocrystals embedded in CsPb2Br5 matrix (CsPbBr3/CsPb2Br5) is formed via air exposure process, leading to impressive PL stability in ambient atmosphere. In addition, the as-fabricated CsPbBr3/CsPb2Br5 structure shows enhanced PL intensity due to the dielectric confinement. The CsPbBr3/CsPb2Br5 structure film can almost reserve its initial PL intensity after four months even stored in ambient atmosphere. The PL intensity for CsPbBr3/CsPb2Br5 film vanishes at elevated temperature and recovers by cooling down in a short time. The reversible PL conversion process can be repeated for over hundreds of times. Based on the reversible PL property, prototype thermal-driven information display devices are demonstrated by employing heating circuits on flexible transparent substrates. These robust perovskite films with reversible PL characteristics promise an alternative solid-state emitting display. |
影响因子： | 13.325 |
分区情况： | 一区 |
链接： | https://onlinelibrary.wiley.com/doi/full/10.1002/adfm.201900730 责任编辑：朱文昌 |