Improve efficiency of white organic light-emitting diodes by using nanosphere arrays in color conversion layers.
Opt Express
; 20(3): 3005-14, 2012 Jan 30.
Article
em En
| MEDLINE
| ID: mdl-22330538
ABSTRACT
The authors demonstrated an efficient color conversion layer (CCL) by using nanosphere arrays in down-converted white organic light-emitting diodes (WOLEDs). The introduced periodical nanospheres not only helped extract the confined light in devices, but also increased the effective light path to achieve high-efficiency color conversion. By applying a CCL with red phosphor on a 400-nm-period nanosphere array, we achieved 137% color conversion ratio for blue OLEDs, which was 2.68 times higher than conventional flat CCL. The resulting luminous efficiency of WOLEDs with patterned CCLs (20.97 cd/A, 1000 cd/m2) was two times higher than the efficiency of the flat device (10.26 cd/A, 1000 cd/m2).
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Semicondutores
/
Iluminação
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Cor
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Nanotecnologia
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Nanosferas
Idioma:
En
Ano de publicação:
2012
Tipo de documento:
Article