title: Two- and three-photon absorption and excitation phosphorescence of oligofluorene-substituted Ir(ppy)3.
abstract: A series of triscyclometalated iridium complexes with oligofluorene-substituted ppy ligands manifest impressive two- and three-photon absorption properties. In particular, a star-shaped complex bearing three carbazole-terminated trifluorenyl ppy demonstrates a large three-photon absorption cross section up to 81 × 10(-78) cm(6) s(2) photon(-2). In combination with optimal phosphorescence quantum yields (0.5-0.8), such iridium complexes are effective two- and three-photon excited phosphorescence emitters.
authors: Beijing National Laboratory for Molecular Sciences, Center for Soft Matter Science and Engineering, Department of Applied Chemistry and the Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China. dhzhao@pku.edu.cn.
authors: Yuanpeng
authors: Y
authors: Fan
authors: Duanchen
authors: D
authors: Ding
authors: Dahui
authors: D
authors: Zhao