Zhao Qiqi, Chen Feitong, Li Changqian, Shang Chenyu, Huang Qi, Yan Bin, Zhu Huiling, Wang Kunhua, Zhang Weiwei, Zhou Tianliang, Ding Jianxu
College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
College of Energy Storage Technology, Shandong University of Science and Technology, Qingdao 266590, China.
Dalton Trans. 2023 Mar 28;52(13):3921-3941. doi: 10.1039/d3dt00122a.
Perovskite nanomaterials have been highly thought as next-generation light emitters after recent development owing to their benefits of simple synthesis, low-cost, large-area, and wide color gamut. Encouragingly, the external quantum efficiencies (EQEs) of green, red, and near-infrared perovskite light-emitting diodes (PeLEDs) have exceeded more than 20%. However, the performance of the blue PeLEDs is still lower than other analogs, which severely limits the applications of PeLEDs in future full-color displays. Herein, we have reviewed the advances in blue perovskite NCs and their applications in blue PeLEDs. Promising blue perovskite emitters and strategies for fabricating highly efficient blue PeLEDs based on perovskite NCs are investigated and highlighted. Moreover, we point out the main challenges in blue perovskite NC LEDs including low electroluminescence efficiency (EL), spectral instability, the difficulty of charge injection, and device optimization. The perspectives for the further development of blue PeLEDs are also presented.
由于具有合成简单、成本低、大面积和色域广等优点，近年来钙钛矿纳米材料被高度视为下一代发光体。令人鼓舞的是，绿色、红色和近红外钙钛矿发光二极管（PeLED）的外量子效率（EQEs）已超过20%。然而，蓝色PeLED的性能仍低于其他同类产品，这严重限制了PeLED在未来全彩显示器中的应用。在此，我们综述了蓝色钙钛矿纳米晶的进展及其在蓝色PeLED中的应用。研究并强调了有前景的蓝色钙钛矿发光体以及基于钙钛矿纳米晶制造高效蓝色PeLED的策略。此外，我们指出了蓝色钙钛矿纳米晶发光二极管的主要挑战，包括低电致发光效率（EL）、光谱不稳定性、电荷注入困难和器件优化。还介绍了蓝色PeLED进一步发展的前景。
