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Title: High efficiency and low roll-off blue phosphorescent organic light-emitting devices using mixed host architecture

Abstract

We report high efficiency and low roll-off for blue electrophosphorescent organic light emitting devices (OLEDs) based on a mixed host layer architecture. The devices were fabricated using a mixed layer of di-[4-(N,N-ditolyl-amino)-phenyl]cyclohexane (TAPC), a hole transport material, and 2,8-bis(diphenylphosphoryl)dibenzothiophene (PO15), an electron transport material, as the host layer doped with the blue phosphor iridium (III) bis[(4,6-difluorophenyl)-pyridinato-N,C2’]picolinate (FIrpic). Using a mixed layer as the host allowed us to achieve high power efficiency (59 lm/W at 100 cd/m2), low turn-on voltage (2.7 V for >10 cd/m2), and low roll-off in these devices.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
991568
Report Number(s):
PNNL-SA-71085
Journal ID: ISSN 0003-6951; APPLAB; 35598; 830403000; TRN: US201021%%20
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters, 97:033304
Additional Journal Information:
Journal Volume: 97; Journal Issue: 3; Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; LIGHT EMITTING DIODES; EFFICIENCY; FABRICATION; ORGANIC COMPOUNDS; ELECTRON TRANSFER; IRIDIUM COMPLEXES; PHOSPHORS; Environmental Molecular Sciences Laboratory

Citation Formats

Chopra, Neetu, Swensen, James S, Polikarpov, Evgueni, Cosimbescu, Lelia, So, Franky, and Padmaperuma, Asanga B. High efficiency and low roll-off blue phosphorescent organic light-emitting devices using mixed host architecture. United States: N. p., 2010. Web. doi:10.1063/1.3464969.
Chopra, Neetu, Swensen, James S, Polikarpov, Evgueni, Cosimbescu, Lelia, So, Franky, & Padmaperuma, Asanga B. High efficiency and low roll-off blue phosphorescent organic light-emitting devices using mixed host architecture. United States. doi:10.1063/1.3464969.
Chopra, Neetu, Swensen, James S, Polikarpov, Evgueni, Cosimbescu, Lelia, So, Franky, and Padmaperuma, Asanga B. Tue . "High efficiency and low roll-off blue phosphorescent organic light-emitting devices using mixed host architecture". United States. doi:10.1063/1.3464969.
@article{osti_991568,
title = {High efficiency and low roll-off blue phosphorescent organic light-emitting devices using mixed host architecture},
author = {Chopra, Neetu and Swensen, James S and Polikarpov, Evgueni and Cosimbescu, Lelia and So, Franky and Padmaperuma, Asanga B},
abstractNote = {We report high efficiency and low roll-off for blue electrophosphorescent organic light emitting devices (OLEDs) based on a mixed host layer architecture. The devices were fabricated using a mixed layer of di-[4-(N,N-ditolyl-amino)-phenyl]cyclohexane (TAPC), a hole transport material, and 2,8-bis(diphenylphosphoryl)dibenzothiophene (PO15), an electron transport material, as the host layer doped with the blue phosphor iridium (III) bis[(4,6-difluorophenyl)-pyridinato-N,C2’]picolinate (FIrpic). Using a mixed layer as the host allowed us to achieve high power efficiency (59 lm/W at 100 cd/m2), low turn-on voltage (2.7 V for >10 cd/m2), and low roll-off in these devices.},
doi = {10.1063/1.3464969},
journal = {Applied Physics Letters, 97:033304},
issn = {0003-6951},
number = 3,
volume = 97,
place = {United States},
year = {2010},
month = {7}
}