Effects of nanoscale surface modification and triplet energy shielding of a single layer solution processed blue phosphorescent organic light emitting diode by using Triton X-100
Document Type
Article
Publication Date
5-15-2013
Abstract
The effects of triplet energy shielding and nanoscale surface modification using Triton X-100 in a single layer solution processed blue phosphorescent organic light emitting diodes (PhOLED) was investigated. It was found that with 3.2 wt% Triton X-100 doping, the power efficiency of the device doubled at brightness of 1000 cd/m2. The insertion Triton X-100 provides separation between guest–host which reduced back energy transfer from the high triplet of FIrpic (2.7 eV) to the low triplet of PVK host (2.5 eV). Atomic force microscopy (AFM) indicates that phase separation of Triton X-100 modified the emissive layer (EML) surface morphology. This surface modification roughened the film surface at the EML/cathode interface. These combined effects improves the performance of the solution processed blue PhOLED.
Keywords
Energy transfer, Phosphorescent organic light emitting diodes, Triton X-100, Power efficiency, Power spectral density
Divisions
PHYSICS
Publication Title
Synthetic Metals
Volume
172
Publisher
Elsevier