Department of Chemistry
Interfacial triplet confinement for achieving efficient solution-processed deep-blue and white electrophosphorescent devices with underestimated poly(N-vinylcarbazole) as the host
Highly efficient deep-blue and white PhOLEDs with FIr6 as a blue emitter and PVK as a host are developed by using a high triplet level interfacial layer to confine triplet excitons within the emissive layer. Incorporation of an interfacial layer with a higher triplet level such as TPCz can effectively cut off the potential loss pathways of the triplet excitons within the PVK:FIr6 emissive layer. The resultant PVK:FIr6-based deep-blue and white solution-processed PhOLEDs exhibit an unprecedented forward-viewing EQE of 16.1% and a total EQE of 28.0% (38.4 lm W-1) at a practical luminance of 1000 cd m-2, respectively. © 2013 The Royal Society of Chemistry.
Source Publication Title
Journal of Materials Chemistry C
Royal Society of Chemistry
Link to Publisher's Edition
Zhang, Baohua, Lihui Liu, Guiping Tan, Bing Yao, Cheuk-Lam Ho, Shumeng Wang, Junqiao Ding, Zhiyuan Xie, Wai-Yeung Wong, and Lixiang Wang. "Interfacial triplet confinement for achieving efficient solution-processed deep-blue and white electrophosphorescent devices with underestimated poly(N-vinylcarbazole) as the host." Journal of Materials Chemistry C 1.32 (2013): 4933-4939.