TITLE

Self-assembled monolayer modification of indium tin oxide anode surface for polymer light-emitting diodes with poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene vinylene] for high performance

AUTHOR(S)
Chung-Chin Hsiao; Chih-Hao Chang; Ming-Chin Hung; Neng-Jye Yang; Show-An Chen
PUB. DATE
May 2005
SOURCE
Applied Physics Letters;5/30/2005, Vol. 86 Issue 22, p223505
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We demonstrate that introducing a self-assembled monolayer (SAM) derived from 1,1,1,3,3,3-hexamethyldisilazane on an indium tin oxide (ITO) anode surface for the device (ITO/SAM/poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene vinylene]/Ca/Al), can lead to an improvement in maximum device efficiency from 2.0 to 3.9 cd/A and maximum brightness from 33 000 to 34 400 cd/m2. Such improvement is even better than that with introducing a layer of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (2.6 cd/A and 16 000 cd/m2), which is usually used as a hole transport (or injection) layer. The improvement results from a hole blocking effect and better wetting by converting the ITO surface from hydrophilic to hydrophobic provided by the SAM.
ACCESSION #
17249922

 

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