https://scholars.lib.ntu.edu.tw/handle/123456789/625283
標題: | Optimization of the carrier recombination and transmission properties in perovskite LEDs by doping poly (4-vinylpyridine) and graphene quantum dots made of chitin | 作者: | Yan Z.-L Liang F.-C Yeh C.-Y Kurniawan D Benas J.-S Chen W.-C Cho C.J Chiang W.-H RU-JONG JENG Kuo C.-C. |
關鍵字: | CsPbxBry; Dipole–dipole interaction; Graphene quantum dot; HOMO engineering; PeLEDs; Poly(4-Vinylpyridine) | 公開日期: | 2022 | 卷: | 444 | 來源出版物: | Chemical Engineering Journal | 摘要: | Light emission intensity and a lifetime of perovskite light-emitting diodes (PeLEDs) have improved considerably through fine-tuning the regulation of carriers’ recombination and transport. This study found that adding poly (4-vinylpyridine) within a CsxPbBry system leads to a dipole–dipole interaction of pyridine-N and Pb2+. This interaction increases the solubility of the CsxPbBry precursor solution, which stabilizes the CsxPbBry crystal structure and induces a CsPbBr3 unitary state. The interaction further generates a polaron region and causes the orderly distribution of excess carriers in the electric field, thus preventing disordered surface charges from structurally damaging the crystal. The PEDOT:PSS hole transport layer mixed with a graphene quantum dot made of chitin tunes the highest occupied molecular orbital to improve carrier transmission efficiency. We fabricated PeLEDs with a peak luminance of 20420 cd m−2 and a fatigue half-life four times higher than original PeLEDs. This stable performance of the device can hasten the commercial development of PeLEDs. © 2022 Elsevier B.V. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85129563163&doi=10.1016%2fj.cej.2022.136518&partnerID=40&md5=b330848a213f85ac960b7e70e9ea472f https://scholars.lib.ntu.edu.tw/handle/123456789/625283 |
ISSN: | 13858947 | DOI: | 10.1016/j.cej.2022.136518 |
顯示於: | 高分子科學與工程學研究所 |
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