An efficient dual-emissive-layer white organic light emitting-diode: Insight into device working mechanism and origin of color-shift

Qi Wang; Dongge Ma; Junqiao Ding; Lixiang Wang; Qiquan Qiao; Huiping Jia; Bruce E. Gnade; Jason Hoshikawa-Halbert

doi:10.1016/j.orgel.2015.01.027

An efficient dual-emissive-layer white organic light emitting-diode: Insight into device working mechanism and origin of color-shift

Qi Wang, Dongge Ma, Junqiao Ding, Lixiang Wang, Qiquan Qiao, Huiping Jia, Bruce E. Gnade, Jason Hoshikawa-Halbert

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

By using a single host for both blue and orange phosphorescent dopants, a simple and efficient white organic light emitting-diode is reported. The dual-emissive-layer white device achieves a peak external quantum efficiency of 16.9 ± 0.9% and power efficiency of 44.1 ± 2.3 lm/W without out-coupling enhancement. Analysis of the device working mechanism determines that the blue dopant molecules can form a bridge to facilitate electron transport into the adjacent orange emitting-layer. The orange emission originates from both the direct electron trapping by the orange dopant and incomplete blue-orange energy transfer mechanisms. The origin of the voltage-dependent color shift of the device is quantitatively determined according to the working mechanism. Possible solution to reducing the color-shift is also provided based on the calculation and analytical results.

Original language	English (US)
Pages (from-to)	157-162
Number of pages	6
Journal	Organic Electronics
Volume	19
DOIs	https://doi.org/10.1016/j.orgel.2015.01.027
State	Published - Apr 2015
Externally published	Yes

Keywords

Charge transport
Color-shift
Phosphorescence
White organic light-emitting diode

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
General Chemistry
Condensed Matter Physics
Materials Chemistry
Electrical and Electronic Engineering
Biomaterials

Access to Document

10.1016/j.orgel.2015.01.027

Cite this

@article{fcdcce9ed1424772a1f08fcc5a846920,

title = "An efficient dual-emissive-layer white organic light emitting-diode: Insight into device working mechanism and origin of color-shift",

abstract = "By using a single host for both blue and orange phosphorescent dopants, a simple and efficient white organic light emitting-diode is reported. The dual-emissive-layer white device achieves a peak external quantum efficiency of 16.9 ± 0.9% and power efficiency of 44.1 ± 2.3 lm/W without out-coupling enhancement. Analysis of the device working mechanism determines that the blue dopant molecules can form a bridge to facilitate electron transport into the adjacent orange emitting-layer. The orange emission originates from both the direct electron trapping by the orange dopant and incomplete blue-orange energy transfer mechanisms. The origin of the voltage-dependent color shift of the device is quantitatively determined according to the working mechanism. Possible solution to reducing the color-shift is also provided based on the calculation and analytical results.",

keywords = "Charge transport, Color-shift, Phosphorescence, White organic light-emitting diode",

author = "Qi Wang and Dongge Ma and Junqiao Ding and Lixiang Wang and Qiquan Qiao and Huiping Jia and Gnade, {Bruce E.} and Jason Hoshikawa-Halbert",

year = "2015",

month = apr,

doi = "10.1016/j.orgel.2015.01.027",

language = "English (US)",

volume = "19",

pages = "157--162",

journal = "Organic Electronics",

issn = "1566-1199",

publisher = "Elsevier",

}

TY - JOUR

T1 - An efficient dual-emissive-layer white organic light emitting-diode

T2 - Insight into device working mechanism and origin of color-shift

AU - Wang, Qi

AU - Ma, Dongge

AU - Ding, Junqiao

AU - Wang, Lixiang

AU - Qiao, Qiquan

AU - Jia, Huiping

AU - Gnade, Bruce E.

AU - Hoshikawa-Halbert, Jason

PY - 2015/4

Y1 - 2015/4

N2 - By using a single host for both blue and orange phosphorescent dopants, a simple and efficient white organic light emitting-diode is reported. The dual-emissive-layer white device achieves a peak external quantum efficiency of 16.9 ± 0.9% and power efficiency of 44.1 ± 2.3 lm/W without out-coupling enhancement. Analysis of the device working mechanism determines that the blue dopant molecules can form a bridge to facilitate electron transport into the adjacent orange emitting-layer. The orange emission originates from both the direct electron trapping by the orange dopant and incomplete blue-orange energy transfer mechanisms. The origin of the voltage-dependent color shift of the device is quantitatively determined according to the working mechanism. Possible solution to reducing the color-shift is also provided based on the calculation and analytical results.

AB - By using a single host for both blue and orange phosphorescent dopants, a simple and efficient white organic light emitting-diode is reported. The dual-emissive-layer white device achieves a peak external quantum efficiency of 16.9 ± 0.9% and power efficiency of 44.1 ± 2.3 lm/W without out-coupling enhancement. Analysis of the device working mechanism determines that the blue dopant molecules can form a bridge to facilitate electron transport into the adjacent orange emitting-layer. The orange emission originates from both the direct electron trapping by the orange dopant and incomplete blue-orange energy transfer mechanisms. The origin of the voltage-dependent color shift of the device is quantitatively determined according to the working mechanism. Possible solution to reducing the color-shift is also provided based on the calculation and analytical results.

KW - Charge transport

KW - Color-shift

KW - Phosphorescence

KW - White organic light-emitting diode

UR - http://www.scopus.com/inward/record.url?scp=84923260402&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84923260402&partnerID=8YFLogxK

U2 - 10.1016/j.orgel.2015.01.027

DO - 10.1016/j.orgel.2015.01.027

M3 - Article

AN - SCOPUS:84923260402

SN - 1566-1199

VL - 19

SP - 157

EP - 162

JO - Organic Electronics

JF - Organic Electronics

ER -

An efficient dual-emissive-layer white organic light emitting-diode: Insight into device working mechanism and origin of color-shift

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this