通过混合单重态和三重态激基复合物发射实现单层聚（N-乙烯基咔唑）聚合物发光器件的白光发射。

White light emission from single layer poly (n-vinylcarbazole) polymeric light-emitting devices by mixing singlet and triplet excimer emissions.

作者信息

Qian Lei, Bera Debasis, Holloway Paul H

机构信息

Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611-6400, USA.

出版信息

J Chem Phys. 2007 Dec 28;127(24):244707. doi: 10.1063/1.2813431.

DOI:10.1063/1.2813431

PMID:18163695

Abstract

White light electroluminescence (EL) was obtained by mixing emission from singlet and triplet excimers from a single poly (n-vinylcarbazole) (PVK) spin cast layer after irradiation of the solution with UV light. With increased UV light irradiation, the intensity from the triplet excimer (red-630 nm) of PVK increased compared with that of the singlet excimer (blue-460 nm) due to an increased population of both adjacent benzene rings being aligned with one another (fully overlapping) versus only one of the adjacent benzene rings being aligned (partially overlapping). The emission color changed from blue to white with increased UV irradiation time while the EL brightness and current density decreased and the turn-on voltage increased.

摘要

在用紫外光照射溶液后，通过混合来自单个旋涂聚（N-乙烯基咔唑）（PVK）层的单线态和三线态准分子的发射，获得了白光电致发光（EL）。随着紫外光照射量的增加，PVK三线态准分子（红色 - 630 nm）的强度相对于单线态准分子（蓝色 - 460 nm）增加，这是因为相邻苯环彼此对齐（完全重叠）的数量增加，而不是只有一个相邻苯环对齐（部分重叠）。随着紫外照射时间的增加，发射颜色从蓝色变为白色，而EL亮度和电流密度降低，开启电压增加。