Sky-Blue Organic Light Emitting Diode with 37% External Quantum Efficiency Using Thermally Activated Delayed Fluorescence from Spiroacridine-Triazine Hybrid

Ting-An Lin; Tanmay Chatterjee; Wei-Lung Tsai; Wei-Kai Lee; Meng-Jung Wu; Min Jiao; Kuan-Chung Pan; Chih-Lung Yi; Chin-Lung Chung; Ken-Tsung Wong; Chung-Chih Wu

doi:10.1002/adma.201601675

Sky-Blue Organic Light Emitting Diode with 37% External Quantum Efficiency Using Thermally Activated Delayed Fluorescence from Spiroacridine-Triazine Hybrid

Adv Mater. 2016 Aug;28(32):6976-83. doi: 10.1002/adma.201601675. Epub 2016 Jun 6.

Authors

Affiliations

¹ Department of Electrical Engineering, Graduate Institute of Electronics Engineering and Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei, 10617, Taiwan.
² Department of Chemistry, National Taiwan University, and Institute of Atomic and Molecular Science, Academia Sinica, Taipei, 10617, Taiwan.

PMID: 27271917
DOI: 10.1002/adma.201601675

Abstract

Extremely efficient sky-blue organic electroluminescence with external quantum efficiency of ≈37% is achieved in a conventional planar device structure, using a highly efficient thermally activated delayed fluorescence emitter based on the spiroacridine-triazine hybrid and simultaneously possessing nearly unitary (100%) photoluminescence quantum yield, excellent thermal stability, and strongly horizontally oriented emitting dipoles (with a horizontal dipole ratio of 83%).

Keywords: OLEDs; dipole orientation; efficiency; spiroacridine; thermally activated delayed fluorescence.