TY - JOUR
T1 - Ag nanowire-based electrodes for improving the output power of ultraviolet AlGaN-based light-emitting diodes
AU - Park, Jae Seong
AU - Kim, Jae Ho
AU - Na, Jin Young
AU - Kim, Dae Hyun
AU - Kang, Daesung
AU - Kim, Sun Kyung
AU - Seong, Tae Yeon
N1 - Funding Information:
This work was supported by the Brain Korea 21 plus program funded by the Ministry of Science, ICT and Future Planning, Korea, and by LG Innotek Co., Ltd.
Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2017
Y1 - 2017
N2 - We developed hybrid Ag nanodots (NDs)/Ag nanowires (NWs) electrodes for enhancing the light output power of near ultraviolet (NUV) AlGaN-based light-emitting diodes (LEDs). At 385 nm, 10-nm-thick ITO-only films deposited on p-GaN/sapphire gave a transmittance of 70%, whereas hybrid Ag NDs/Ag NWs film showed a transmittance of 47%. LEDs with ITO-only, Ag NDs/Ag NWs, and activated-Ag NDs/Ag NWs electrodes showed forward-bias voltages of 3.50, 3.65, and 3.57 V, respectively, at 20 mA. The LEDs with the ITO-only, Ag NDs/Ag NWs, and activated-Ag NDs/Ag NWs electrodes produced series resistances of 14.3, 15.2, and 14.5 Ω, respectively. The LEDs with the Ag NDs/Ag NWs and activated-Ag NDs/Ag NWs electrodes yielded 13.1% and 23.7% higher light output powers, respectively, at 20 mA than that produced with the ITO-only electrode. On the basis of the emission images obtained from the LEDs with 10-nm-thick ITO-only, Ag NDs/Ag NWs, and activated-Ag NDs/Ag NWs electrodes, the enhanced light output power is attributed to effective current spreading and current injection.
AB - We developed hybrid Ag nanodots (NDs)/Ag nanowires (NWs) electrodes for enhancing the light output power of near ultraviolet (NUV) AlGaN-based light-emitting diodes (LEDs). At 385 nm, 10-nm-thick ITO-only films deposited on p-GaN/sapphire gave a transmittance of 70%, whereas hybrid Ag NDs/Ag NWs film showed a transmittance of 47%. LEDs with ITO-only, Ag NDs/Ag NWs, and activated-Ag NDs/Ag NWs electrodes showed forward-bias voltages of 3.50, 3.65, and 3.57 V, respectively, at 20 mA. The LEDs with the ITO-only, Ag NDs/Ag NWs, and activated-Ag NDs/Ag NWs electrodes produced series resistances of 14.3, 15.2, and 14.5 Ω, respectively. The LEDs with the Ag NDs/Ag NWs and activated-Ag NDs/Ag NWs electrodes yielded 13.1% and 23.7% higher light output powers, respectively, at 20 mA than that produced with the ITO-only electrode. On the basis of the emission images obtained from the LEDs with 10-nm-thick ITO-only, Ag NDs/Ag NWs, and activated-Ag NDs/Ag NWs electrodes, the enhanced light output power is attributed to effective current spreading and current injection.
KW - Ag nanodot
KW - Ag nanowire
KW - Light-emitting diode
KW - Ohmic spreader
UR - http://www.scopus.com/inward/record.url?scp=85011578019&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2017.01.351
DO - 10.1016/j.jallcom.2017.01.351
M3 - Article
AN - SCOPUS:85011578019
SN - 0925-8388
VL - 703
SP - 198
EP - 203
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -