Abstract
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 SiO 2 and TiO x 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.
| Original language | English |
|---|---|
| Pages (from-to) | 579-585 |
| Number of pages | 7 |
| Journal | Organic Electronics: physics, materials, applications |
| Volume | 13 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2012 Apr 1 |
| Externally published | Yes |
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Keywords
- Corrugated structure
- Light extraction
- Organic light-emitting diodes
- Out-coupling structure
- Striation
ASJC Scopus subject areas
- Biomaterials
- Electronic, Optical and Magnetic Materials
- Materials Chemistry
- Electrical and Electronic Engineering
- Chemistry(all)
- Condensed Matter Physics
Cite this
Corrugated structure through a spin-coating process for enhanced light extraction from organic light-emitting diodes. / Hyun, Woo Jin; Im, Sang Hyuk; Park, O. Ok; Chin, Byung Doo.
In: Organic Electronics: physics, materials, applications, Vol. 13, No. 4, 01.04.2012, p. 579-585.Research output: Contribution to journal › Article
}
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
PY - 2012/4/1
Y1 - 2012/4/1
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 SiO 2 and TiO x 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 SiO 2 and TiO x 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
UR - http://www.scopus.com/inward/record.url?scp=84856443580&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84856443580&partnerID=8YFLogxK
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 -