High-efficiency green electrophosphorescent organic light-emitting diodes with a simple device structure

Chih-Hsien Yuan; Shun-Wei Liu; Li-An Liu; Yu-San Chen; Pao-Chen Lai; Chih-Chien Lee

doi:10.1117/12.929566

13 September 2012 High-efficiency green electrophosphorescent organic light-emitting diodes with a simple device structure

Chih-Hsien Yuan, Shun-Wei Liu, Li-An Liu, Yu-San Chen, Pao-Chen Lai, Chih-Chien Lee

Author Affiliations +

Proceedings Volume 8476, Organic Light Emitting Materials and Devices XVI; 84761X (2012) https://doi.org/10.1117/12.929566
Event: SPIE Organic Photonics + Electronics, 2012, San Diego, California, United States

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.

Citation Download Citation

Chih-Hsien Yuan, Shun-Wei Liu, Li-An Liu, Yu-San Chen, Pao-Chen Lai, and Chih-Chien Lee "High-efficiency green electrophosphorescent organic light-emitting diodes with a simple device structure", Proc. SPIE 8476, Organic Light Emitting Materials and Devices XVI, 84761X (13 September 2012); https://doi.org/10.1117/12.929566

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available