Chinese Optics Letters, 2016, 14 (4): 043001, Published Online: Aug. 6, 2018
Efficiency enhancement of fluorescent blue organic light-emitting diodes using doped hole transport and emissive layers Download: 1097次
Abstract
The electroluminescent characteristics of blue organic light-emitting diodes (BOLEDs) fabricated with doped charge carrier transport layers are analyzed. The fluorescent blue dopant BCzVBi is doped in an emissive layer, hole transport layer (HTL) and electron transport layer (ETL), respectively, to optimize the probability of exciton generation in the BOLEDs. The luminance and luminous efficiency of BOLEDs made with BCzVBi-doped HTL and ETL increase by 22% and 17% from 11 , 683 cd / m 2 at 8.5 V and 6.08 cd/A at 4.0 V to 14 , 264 cd / m 2 at 8.5 V and 7.13 cd/A at 4.0 V while CIE coordinates of (0.15, 0.15) of both types of BOLEDs remained unchanged. The electron mobility of BCzVBi is estimated to be 1.02 × 10 5 cm 2 / Vs by TOF.
Nam Ho Kim, You-Hyun Kim, Ju-An Yoon, Seung Il Yoo, Kok Wai Cheah, Furong Zhu, Woo Young Kim. Efficiency enhancement of fluorescent blue organic light-emitting diodes using doped hole transport and emissive layers[J]. Chinese Optics Letters, 2016, 14(4): 043001.