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Sol-gel deposited gallium-doped zinc oxide electrode for polymer light-emitting diode applications
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Paper Abstract

We have made a sol-gel deposited gallium-doped zinc oxide (GZO) film as a transparent conductive anode in polymer light-emitting diode (PLED) applications. The GZO films were obtained by spin-coating GZO precursor solutions followed by consecutive thermal annealing in the air and in the hydrogen-rich atmosphere. The resistance of GZO film was reduced to ~100 Ω/□ after thermal annealing in the hydrogen environment. Its surface roughness was sufficiently low (1.159 nm RMS) for depositing other polymer layers. We have fabricated PLEDs with quartz substrate / solution-processed GZO electrode (anode) / PEDOT:PSS (HITL) / SPG-01T (Green polymer light-emitting material purchased from Merck, EML) / Ca (EIL) / Al (Cathode). The fabricated devices showed current efficiency of 3.06 cd/A and power efficiency of 1.25 lm/W at luminance of 1000 cd/m2.

Paper Details

Date Published: 13 September 2012
PDF: 5 pages
Proc. SPIE 8476, Organic Light Emitting Materials and Devices XVI, 84761W (13 September 2012); doi: 10.1117/12.928910
Show Author Affiliations
Donghyun Kim, Seoul National Univ. (Korea, Republic of)
Jaeheung Ha, Seoul National Univ. (Korea, Republic of)
Changhee Lee, Seoul National Univ. (Korea, Republic of)
Yongtaek Hong, Seoul National Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 8476:
Organic Light Emitting Materials and Devices XVI
Franky So; Chihaya Adachi, Editor(s)

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