Ga-doped TiZnO transparent conductive oxide used as an alternative anode in blue, green, and red phosphorescent OLEDs

X-ray diffraction was used to study the optoelectronic characteristics of Ga-doped TiZnO (GTZO) thin film and revealed increased crystallinity with annealing temperatures ranging from as-grown to 450 °C. The low thin film resistivity of 6.1 × 10 −4 Ω cm and the average high optical transmittance of...

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Published in:Physical chemistry chemical physics : PCCP 2014-09, Vol.16 (36), p.19618-19624
Main Authors: Chang, Chih-Hao, Liu, Wei-Sheng, Wu, Shen-Yu, Huang, Jun-Lin, Hung, Chao-Yu, Chang, Yu-Lin, Wu, Ying-Chieh, Chen, Wei-Chih, Wu, Yi-Cheng
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Language:English
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Anodes
Crystallinity
Diffraction
Diodes
Oxides
Thin films
Transmittance
Wavelengths
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cited_by cdi_FETCH-LOGICAL-c298t-d4387c28c91c74f350e228f073521b22d353e7d9dd5ad2e81712583fd46da1763
cites cdi_FETCH-LOGICAL-c298t-d4387c28c91c74f350e228f073521b22d353e7d9dd5ad2e81712583fd46da1763
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container_issue 36
container_start_page 19618
container_title Physical chemistry chemical physics : PCCP
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creator Chang, Chih-Hao
Liu, Wei-Sheng
Wu, Shen-Yu
Huang, Jun-Lin
Hung, Chao-Yu
Chang, Yu-Lin
Wu, Ying-Chieh
Chen, Wei-Chih
Wu, Yi-Cheng
description X-ray diffraction was used to study the optoelectronic characteristics of Ga-doped TiZnO (GTZO) thin film and revealed increased crystallinity with annealing temperatures ranging from as-grown to 450 °C. The low thin film resistivity of 6.1 × 10 −4 Ω cm and the average high optical transmittance of 93% in the wavelength range between 350 and 800 nm make GTZO an alternative candidate for application in organic light-emitting diodes (OLEDs). Both GTZO and indium-tin-oxide (ITO) anodes are employed for the successful fabrication of blue, green, and red phosphorescent OLEDs. The similar device electrical characteristics observed could be interpreted as evidence of the effectiveness of doping Ga in TiZnO. The simplified tri-layer blue, green, and red phosphorescent OLEDs demonstrated high performance with respective maximum efficiencies of 19.0%, 14.5%, and 9.1%, representing an improvement over ITO-based OLEDs. Furthermore, the OLEDs with the GTZO anode exhibited superior performance at higher current densities, demonstrating high potential for OLED display and lighting applications. GTZO-based r, g, b pholeds.
doi_str_mv 10.1039/c4cp02924k
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subjects Anodes
Crystallinity
Diffraction
Diodes
Oxides
Thin films
Transmittance
Wavelengths
title Ga-doped TiZnO transparent conductive oxide used as an alternative anode in blue, green, and red phosphorescent OLEDs
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