Spectral Properties of Energy Transfer in Doubly Doped Polymer Electroluminescence
ZHANG Ting1, XU Zheng1，2, TENG Feng1, QIAN Lei1, WANG Yong-sheng1, XU Xu-rong1*
1. Institute of Optoelectronics Technology, Beijing Jiaotong University，the Lab of Materials for Information Storage and Displays, Beijing 100044, China 2. Postdoctoral Working Station of Zhong-Huan San-Jin Ltd., Tianjin Economical and Technological Development Area, Tianjin 300457, China
Abstract：The authors report a cascade energy transfer based on the long-range dipole-dipole Frster energy transfer between polymer and two fluorescent dyes in solid thin films. The authors studied the fabrication and emission characteristics of a new doubly doped system for color purity and energy transfer efficiency, in which two fluorescent dyes, i.e. TPB and Rubrene were doped into PVK. In the blend film, PVK acted as the energy donor, Rubrene as the fluorescent dye, and the assistant dopant TPB was used to facilitate the energy transfer from PVK to the dye Rubrene. Orange emission comes from Rubrene via a cascade energy transfer from PVK to TPB and then from TPB to Rubrene.
