福建师范大学林正欢团队开发出了光/力敏感0D无铅钙钛矿。相关研究成果于2022年1月11日发表在国际顶尖学术期刊《德国应用化学》。

该文中，研究人员从InCl₃和苯胺盐酸盐中制备了具有蓝色室温磷光（RTP）的新型零维（0D）钙钛矿（PA6InCl9和PA4InCl7）。其对外界光和力刺激高度敏感。光照下，PA6InCl9的RTP量子产率可从25.2%提高到42.8%。在机械力作用下，PA4InCl7表现出向PA6InCl9的相变，从而提高了超长RTP，寿命高达1.2s。

此外，在PA6InCl9中引入Sb³⁺时，可以实现量子产率接近100%的白色和橙色纯RTP。显色指数（CRI）接近90的白色纯磷光由PA6InCl9的蓝色RTP和Sb³⁺的橙色RTP组成。因此，该研究工作不仅克服了长期存在的蓝色RTP量子产率低、寿命短的问题，而且获得了高效率的白色RTP。为实现近单位量子效率提供了一种可行的方法，在光学器件和智能材料领域具有巨大的应用潜力。

附：英文原文

Title: Light/force-sensitive 0D lead-free perovskites: from highly efficient blue afterglow to white phosphorescence with near-unity quantum efficiency

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

Issue&Volume: 2022-01-11

Abstract: Herein, new types of zero-dimensional (0D) perovskites (PA6InCl9 and PA4InCl7) with blue room temperature phosphorescence (RTP) were obtained from InCl  3  and aniline hydrochloride. These are highly sensitive to external light and force stimuli. 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 Sb  3+  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 Sb  3+  . 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.

DOI: 10.1002/anie.202116511

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202116511