https://scholars.lib.ntu.edu.tw/handle/123456789/639150
標題: | Enhancing the Performance of 2D Tin-Based Pure Red Perovskite Light-Emitting Diodes through the Synergistic Effect of Natural Antioxidants and Cyclic Molecular Additives | 作者: | Chen, Chiung Han Yu, Ming Hsuan Wang, Yen Yu Tseng, Yu Cheng Chao, I. Hsiang Ni, I. Chih Lin, Bi Hsuan Lu, Yu Jung CHU-CHEN CHUEH |
關鍵字: | 2D Sn perovskite | cyclic molecular additive | light-emitting diodes | natural antioxidant | pure-red LED | 公開日期: | 1-一月-2024 | 來源出版物: | Small | 摘要: | Tin (Sn)-based perovskites are being investigated in many optoelectronic applications given their similar valence electron configuration to that of lead-based perovskites and the potential environmental hazards of lead-based perovskites. However, the formation of high-quality Sn-based perovskite films faces several challenges, mainly due to the easy oxidation of Sn2+ to Sn4+ and the fast crystallization rate. Here, to develop an environmentally friendly process for Sn-based perovskite fabrication, a series of natural antioxidants are studied as additives and ascorbic acid (VitC) is found to have a superior ability to inhibit the oxidation problem. A common cyclic molecule, 18-Crown-6, is further added as a second additive, which synergizes with VitC to significantly reduce the nonradiative recombination pathways in the PEA2SnI4 film. This synergistic effect greatly improves the performance of 2D red Sn-based PeLED, with a maximum external quantum efficiency of 1.87% (≈9 times that of the pristine device), a purer color, and better bias stability. This work demonstrates the potential of the dual-additive approach in enhancing the performance of 2D Sn-based PeLEDs, while the use of these environmentally friendly additives contributes to their future sustainability. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/639150 | ISSN: | 16136810 | DOI: | 10.1002/smll.202307774 |
顯示於: | 化學工程學系 |
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