Tan Run, Liu Zhenyu, Zang Zhigang, Zhao Shuangyi
Key Laboratory of Optoelectronic Technology and Systems (Ministry of Education), Chongqing University Chongqing 400044 China
CDGM Glass Company Limited Chengdu Sichuan China.
Chem Sci. 2024 Oct 25;16(5):2136-2153. doi: 10.1039/d4sc04119d. eCollection 2025 Jan 29.
Metal halide perovskites (MHPs) have been developed rapidly for application in light-emitting diodes (LEDs), lasers, solar cells, photodetectors and other fields in recent years due to their excellent photoelectronic properties, and they have attracted the attention of many researchers. Perovskite LEDs (PeLEDs) show great promise for next-generation lighting and display technologies, and the external quantum efficiency (EQE) values of polycrystalline thin-film PeLEDs exceed 20%, which is undoubtedly a big breakthrough in lighting and display fields. However, the toxicity and instabilities of lead-based MHPs remain major obstacles limiting their further commercial applications. The exploration and development of lead-free MHPs (LFMHPs) are regarded as the most facile strategies to solve these problems. Compared with lead-based perovskites, LFMHPs exhibit better stabilities and broadband emission. With continuous development of LFMHPs, their photoluminescence quantum yields (PLQYs) have reached 99%, facilitating their use as ideal emitters. In this review, the structures and features of LFMHPs are analyzed, and the preparation methods of LFMHPs with various structures and configurations are discussed. Then, the mechanisms and strategies for improving the emission performance of white LEDs based on LFMHPs are demonstrated. Finally, their challenges in commercial production and perspectives are prospected.
近年来，金属卤化物钙钛矿（MHPs）因其优异的光电性能在发光二极管（LED）、激光器、太阳能电池、光电探测器等领域得到了迅速发展，吸引了众多研究人员的关注。钙钛矿发光二极管（PeLEDs）在下一代照明和显示技术方面展现出巨大潜力，多晶薄膜PeLEDs的外量子效率（EQE）值超过20%，这无疑是照明和显示领域的一项重大突破。然而，铅基MHPs的毒性和不稳定性仍然是限制其进一步商业应用的主要障碍。探索和开发无铅MHPs（LFMHPs）被认为是解决这些问题的最简便策略。与铅基钙钛矿相比，LFMHPs表现出更好的稳定性和宽带发射。随着LFMHPs的不断发展，其光致发光量子产率（PLQYs）已达到99%，使其成为理想的发光体。在这篇综述中，分析了LFMHPs 的结构和特点，并讨论了具有各种结构和构型的LFMHPs的制备方法。然后，阐述了基于LFMHPs提高白光LED发光性能的机理和策略。最后，展望了它们在商业生产中的挑战和前景。
