期刊
ACS OMEGA
卷 6, 期 15, 页码 10437-10446出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.1c00910
关键词
-
资金
- Ministry of Science and Technology (MoST) of Republic of China
- MOST [108-2923-E009-007-MY2, MOST 109-2112-M-006-016]
- Higher Education Sprout Project of the Ministry of Education (MOE), Taiwan
Introducing DPMP or TPP ligands onto cesium lead bromoiodide nanocrystals improves air stability and optoelectronic properties, with DPMP showing better stabilization of emission, carrier lifetime, and photoluminescence quantum yield. The surface passivation by DPMP or TPP ligands reduces nonradiative recombination, leading to enhanced performance and prolonged device lifetime in perovskite light-emitting diodes.
Two new phosphine ligands, diphenylmethylphosphine (DPMP) and triphenylphosphine (TPP), were introduced onto cesium lead bromoiodide nanocrystals (CsPbBrI2 NCs) to improve air stability in the ambient atmosphere. Incorporating DPMP or TPP ligands can also enhance film-forming and optoelectronic properties of the CsPbBrI2 NCs. The results reveal that DPMP is a better ligand to stabilize the emission of CsPbBrI2 NCs than TPP after storage for 21 days. The increased carrier lifetime and photoluminescence quantum yield (PLQY) of perovskite NCs are due to the surface passivation by DPMP or TPP ligands, which reduces nonradiative recombination at the trap sites. The DPMP and TPP-treated CsPbBrI2 NCs were successfully utilized as red emitters for fabricating perovskite light-emitting diodes with enhanced performance and prolonged device lifetime relative to the pristine one.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据