Abstract
Quantum dot (QD) nanocrystals dispersed in photoresist (PR)
film was developed and applied to white organic light-emitting diode
(OLED) to improve optical power of red color through down-converting
of blue and green light. To integrate to white OLED display panel,
the QD dispersed photoresist film was prepared in a thickness of 2
$\mu{m}$
with high concentration of QDs up to 30 wt%. QDs were dispersed
successfully in PR with a matching of nonpolar characteristic for
the ligands of QDs and PR as well as a careful mixing process of PR
and QD dispersed solutions. We also realized the patterning of QD
dispersed PR film with a stripe pattern of 60-
$\mu{m}$
width without a residual layer. The experimental measurement after
passing through a 30 wt% QD dispersed PR film and a red color filter
in white OLED shows the enhancement of 40.2% in the optical power
of red color compared to that from a conventional white OLED without
QD dispersed PR film.
© 2016 IEEE
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