TY - JOUR
T1 - Corrugated structure through a spin-coating process for enhanced light extraction from organic light-emitting diodes
AU - Hyun, Woo Jin
AU - Im, Sang Hyuk
AU - Park, O. Ok
AU - Chin, Byung Doo
N1 - Funding Information:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (CAFDC- 20100009894 and 2010-0010039 ).
PY - 2012/4
Y1 - 2012/4
N2 - We have demonstrated a simple fabrication method for an out-coupling structure to enhance light extraction from organic light-emitting diodes (OLEDs). Spin-coating of SiO2 and TiOx sol mixture solution develops corrugated film. The structural evolution of the corrugation was explained by the localization of surface tension during the solvent evaporation. The structural parameters of the corrugated structure were characterized by varying the spin-coating speed and the mixing ratio of the solution. Compared to conventional devices, OLEDs with a corrugated structure at the backside of the glass substrate showed increased external quantum efficiency without change in the electroluminescence spectrum. The light extraction enhancement is attributed to the decreased incidence angle at the interface of glass substrate and air.
AB - We have demonstrated a simple fabrication method for an out-coupling structure to enhance light extraction from organic light-emitting diodes (OLEDs). Spin-coating of SiO2 and TiOx sol mixture solution develops corrugated film. The structural evolution of the corrugation was explained by the localization of surface tension during the solvent evaporation. The structural parameters of the corrugated structure were characterized by varying the spin-coating speed and the mixing ratio of the solution. Compared to conventional devices, OLEDs with a corrugated structure at the backside of the glass substrate showed increased external quantum efficiency without change in the electroluminescence spectrum. The light extraction enhancement is attributed to the decreased incidence angle at the interface of glass substrate and air.
KW - Corrugated structure
KW - Light extraction
KW - Organic light-emitting diodes
KW - Out-coupling structure
KW - Striation
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U2 - 10.1016/j.orgel.2012.01.001
DO - 10.1016/j.orgel.2012.01.001
M3 - Article
AN - SCOPUS:84856443580
VL - 13
SP - 579
EP - 585
JO - Organic Electronics: physics, materials, applications
JF - Organic Electronics: physics, materials, applications
SN - 1566-1199
IS - 4
ER -