Share Email Print
cover

Proceedings Paper

High-efficiency green electrophosphorescent organic light-emitting diodes with a simple device structure
Author(s): Chih-Hsien Yuan; Shun-Wei Liu; Li-An Liu; Yu-San Chen; Pao-Chen Lai; Chih-Chien Lee
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

In this study, we demonstrate electrophosphorescent organic light-emitting diodes (PHOLEDs) with a simple structure and high efficiency, utilizing fac-tris(2-phenylpyridine)iridium(III) (Ir(ppy)3) as a green phosphorescent emitter. The device structure (ITO/TAPC/TAPC:Ir(ppy)3/TPBi:Ir(ppy)3/TPBi /LiF/Al) was fabricated by the hole transporting layer of 1,1-bis((di-4-tolylamino)phenyl)cyclohexane (TAPC; T1 = 2.87 eV) and the electron transporting layer of 2,2,2-(1,3,5-benzenetriyl)tris-[1-phenyl-1H-benzimidazole] (TPBI; T1 = 2.74 eV) to assemble a double emitting zone without common host materials. The emitting region with a TAPC/TPBI bilayer interface was able to provide an effective energy transference of Ir(ppy)3 (T1 = 2.4 eV). Thus, the green PHOLED exhibited high current efficiency (70 cd/A at 100 cd/m2) and low roll-off in these devices.

Paper Details

Date Published: 13 September 2012
PDF: 7 pages
Proc. SPIE 8476, Organic Light Emitting Materials and Devices XVI, 84761X (13 September 2012); doi: 10.1117/12.929566
Show Author Affiliations
Chih-Hsien Yuan, National Taiwan Univ. of Science and Technology (Taiwan)
Shun-Wei Liu, Ming Chi Univ. of Technology (Taiwan)
Li-An Liu, National Taiwan Univ. of Science and Technology (Taiwan)
Yu-San Chen, National Taiwan Univ. of Science and Technology (Taiwan)
Pao-Chen Lai, National Taiwan Univ. of Science and Technology (Taiwan)
Chih-Chien Lee, National Taiwan Univ. of Science and Technology (Taiwan)


Published in SPIE Proceedings Vol. 8476:
Organic Light Emitting Materials and Devices XVI
Franky So; Chihaya Adachi, Editor(s)

© SPIE. Terms of Use
Back to Top