Abstract
Organic light-emitting diodes (OLEDs) with an enhanced outcoupling efficiency and a suppressed efficiency roll-off were fabricated by inserting a nanosize pixel-defining layer (nPDL) that defines the OLED emission region as an array of nanoholes. The outcoupling efficiency of the nano-arrayed OLEDs was increased through the reduced surface plasmon polariton loss caused by the wavy diffraction grating at the metal-organic interface, and their efficiency roll-off was suppressed through the diffusive exciton outside the exciton-formation zone. As a result, the nano-arrayed OLEDs exhibited enhancements of 148.7% in the power efficiency and 137.0% in the external quantum efficiency at 1000 cd m-2 compared with a reference device. Furthermore, the critical current density (J0) where the external quantum efficiency decreased to half of its initial value was improved by a factor of 2.5.
| Original language | English |
|---|---|
| Pages (from-to) | 19330-19337 |
| Number of pages | 8 |
| Journal | Nanoscale |
| Volume | 10 |
| Issue number | 41 |
| DOIs | |
| Publication status | Published - 2018 Nov 7 |
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ASJC Scopus subject areas
- Materials Science(all)
Cite this
Nano-arrayed OLEDs : Enhanced outcoupling efficiency and suppressed efficiency roll-off. / Hwang, Ha; Shim, Yong Sub; Choi, Junhee; Lee, Dong Jun; Kim, Jae Geun; Lee, Ju Sung; Park, Young Wook; Ju, Byeong Kwon.
In: Nanoscale, Vol. 10, No. 41, 07.11.2018, p. 19330-19337.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Nano-arrayed OLEDs
T2 - Enhanced outcoupling efficiency and suppressed efficiency roll-off
AU - Hwang, Ha
AU - Shim, Yong Sub
AU - Choi, Junhee
AU - Lee, Dong Jun
AU - Kim, Jae Geun
AU - Lee, Ju Sung
AU - Park, Young Wook
AU - Ju, Byeong Kwon
PY - 2018/11/7
Y1 - 2018/11/7
N2 - Organic light-emitting diodes (OLEDs) with an enhanced outcoupling efficiency and a suppressed efficiency roll-off were fabricated by inserting a nanosize pixel-defining layer (nPDL) that defines the OLED emission region as an array of nanoholes. The outcoupling efficiency of the nano-arrayed OLEDs was increased through the reduced surface plasmon polariton loss caused by the wavy diffraction grating at the metal-organic interface, and their efficiency roll-off was suppressed through the diffusive exciton outside the exciton-formation zone. As a result, the nano-arrayed OLEDs exhibited enhancements of 148.7% in the power efficiency and 137.0% in the external quantum efficiency at 1000 cd m-2 compared with a reference device. Furthermore, the critical current density (J0) where the external quantum efficiency decreased to half of its initial value was improved by a factor of 2.5.
AB - Organic light-emitting diodes (OLEDs) with an enhanced outcoupling efficiency and a suppressed efficiency roll-off were fabricated by inserting a nanosize pixel-defining layer (nPDL) that defines the OLED emission region as an array of nanoholes. The outcoupling efficiency of the nano-arrayed OLEDs was increased through the reduced surface plasmon polariton loss caused by the wavy diffraction grating at the metal-organic interface, and their efficiency roll-off was suppressed through the diffusive exciton outside the exciton-formation zone. As a result, the nano-arrayed OLEDs exhibited enhancements of 148.7% in the power efficiency and 137.0% in the external quantum efficiency at 1000 cd m-2 compared with a reference device. Furthermore, the critical current density (J0) where the external quantum efficiency decreased to half of its initial value was improved by a factor of 2.5.
UR - http://www.scopus.com/inward/record.url?scp=85055606535&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85055606535&partnerID=8YFLogxK
U2 - 10.1039/c8nr03198c
DO - 10.1039/c8nr03198c
M3 - Article
C2 - 30203819
AN - SCOPUS:85055606535
VL - 10
SP - 19330
EP - 19337
JO - Nanoscale
JF - Nanoscale
SN - 2040-3364
IS - 41
ER -