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Towards Greatly Improved Efficiency of Polymer LED

Published online by Cambridge University Press:  31 January 2011

Zhang-Lin Zhou ,
Xia Sheng ,
Lihua Zhao ,
Gary Gibson ,
Sity Lam ,
K. Nauka  and
James Brug
Zhang-Lin Zhou
Affiliation:
zhang-lin.zhou@hp.com, HP Labs, Palo Alto, California, United States
Xia Sheng
Affiliation:
xia.sheng@hp.com, HP Labs, Palo Alto, California, United States
Lihua Zhao
Affiliation:
lihua.zhao@hp.com, HP Labs, Palo Alto, California, United States
Gary Gibson
Affiliation:
gary.gibson@hp.com, HP Labs, Palo Alto, California, United States
Sity Lam
Affiliation:
sity.lam@hp.com, HP Labs, Palo Alto, California, United States
K. Nauka
Affiliation:
chris.nauka@hp.com, HP Labs, Palo Alto, California, United States
James Brug
Affiliation:
james.brug@hp.com, HP Labs, Palo Alto, California, United States
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Abstract

Polymer light-emitting diodes (PLEDs) show great promise of revolutionizing display technologies. The archetypical multilayer PLED heterostructure introduces numerous chemical and physical challenges to the develoment of efficient and robust devices. These layered structure are formed from solution based spin-casting or printing with subsequesnt removal of the solvent. However, solvent from the freshly deposited film may dissolve or partially dissolve the underlying layer resulting in loss of the desired structure and corresponding device functionality. Undesirable changes in the morphology and interfaces of the polymer films are another detrimental effect associated with solvent removal. Herein, we demonstrated that by embedding hole transporting materials (HTLs) in a cross-linked polymer matrix, the total luminance and external quantum efficiency were greatly improved over devices without this HTL layer.

Keywords

nanostructureluminescencesolution deposition
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1154: Symposium B – Concepts in Molecular and Organic Electronics , 2009 , 1154-B10-108
Copyright
Copyright © Materials Research Society 2009

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