Zhu Jingrun, Yang Xiaoling, Zhu Yihua, Wang Yuanwei, Cai Jin, Shen Jianhua, Sun Luyi, Li Chunzhong
Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, China.
Department of Chemical & Biomolecular Engineering and Polymer Program, Institute of Materials Science, University of Connecticut , Storrs, Connecticut 06269, United States.
J Phys Chem Lett. 2017 Sep 7;8(17):4167-4171. doi: 10.1021/acs.jpclett.7b01820. Epub 2017 Aug 21.
Here we report the room-temperature, atmospheric synthesis of Mn-doped cesium lead halide (CsPbX) perovskite quantum dots (QDs). The synthesis is performed without any sort of protection, and the dual-color emission mechanism is revealed by density functional theory. The Mn concentration reaches a maximum atomic percentage of 37.73 at%, which is significantly higher in comparison to those achieved in earlier reports via high temperature hot injection method. The optical properties of as-prepared nanocrystals (NCs) remain consistent even after several months. Therefore, red-orange LEDs were fabricated by coating the composite of PS and as-prepared QDs onto ultraviolet LED chips. Additionally, the present approach may open up new methods for doping other ions in CsPbX QDs under room temperature, the capability of which is essential for applications such as memristors and other devices.
在此，我们报道了在室温、大气条件下合成锰掺杂的铯铅卤化物（CsPbX）钙钛矿量子点（QDs）。该合成过程无需任何保护措施，并且通过密度泛函理论揭示了双色发射机制。锰的浓度达到最大原子百分比37.73 at%，与早期通过高温热注入法获得的浓度相比显著更高。所制备的纳米晶体（NCs）即使在几个月后其光学性质仍保持一致。因此，通过将聚苯乙烯（PS）与所制备的量子点的复合材料涂覆在紫外发光二极管芯片上制备了红橙色发光二极管。此外，本方法可能为在室温下对CsPbX量子点进行其他离子掺杂开辟新方法，这一能力对于诸如忆阻器和其他器件等应用至关重要。
