Transparent organic light-emitting diodes consisting of a metal oxide multilayer cathode

Seung Yoon Ryu, Joo Hyon Noh, Byoung Har Hwang, Chang Su Kim, Sung Jin Jo, Jong Tae Kim, Hyeon Seok Hwang, Hong Koo Baik, Hee Seong Jeong, Chang Ho Lee, Seung Yong Song, Seung Ho Choi, Si Young Park

Research output: Contribution to journalArticle

99 Citations (Scopus)

Abstract

The authors have developed a semitransparent, multilayered cathode of indium tin oxide (ITO)/Ag/tungsten oxide (W O3) for transparent organic light-emitting diodes. The device showed a weak negative differential resistance (NDR), until the operating voltage of 8 V was reached. NDR was due to the resonant tunneling by both the quantum barrier and quantum well. The silver oxide (Ag2 O) on the Ag metal was confirmed by x-ray photoelectron spectroscopy, and the energy levels of Ag2 O were quantized due to the quantum size effect and this produced the resonant tunneling channels. The device using ITOAgW O3 with a LiFAl bilayer was superior to those devices which only used ITO or W O3, mainly because the out coupling was enhanced by employing a W O3 material, which is much more transparent than ITO.

Original languageEnglish
Article number023306
JournalApplied Physics Letters
Volume92
Issue number2
DOIs
Publication statusPublished - 2008 Jan 28

Fingerprint

indium oxides
tin oxides
metal oxides
light emitting diodes
cathodes
resonant tunneling
silver oxides
tungsten oxides
x ray spectroscopy
energy levels
quantum wells
photoelectron spectroscopy
electric potential
metals

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Ryu, S. Y., Noh, J. H., Hwang, B. H., Kim, C. S., Jo, S. J., Kim, J. T., ... Park, S. Y. (2008). Transparent organic light-emitting diodes consisting of a metal oxide multilayer cathode. Applied Physics Letters, 92(2), [023306]. https://doi.org/10.1063/1.2835044
Ryu, Seung Yoon ; Noh, Joo Hyon ; Hwang, Byoung Har ; Kim, Chang Su ; Jo, Sung Jin ; Kim, Jong Tae ; Hwang, Hyeon Seok ; Baik, Hong Koo ; Jeong, Hee Seong ; Lee, Chang Ho ; Song, Seung Yong ; Choi, Seung Ho ; Park, Si Young. / Transparent organic light-emitting diodes consisting of a metal oxide multilayer cathode. In: Applied Physics Letters. 2008 ; Vol. 92, No. 2.
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Ryu, SY, Noh, JH, Hwang, BH, Kim, CS, Jo, SJ, Kim, JT, Hwang, HS, Baik, HK, Jeong, HS, Lee, CH, Song, SY, Choi, SH & Park, SY 2008, 'Transparent organic light-emitting diodes consisting of a metal oxide multilayer cathode', Applied Physics Letters, vol. 92, no. 2, 023306. https://doi.org/10.1063/1.2835044

Transparent organic light-emitting diodes consisting of a metal oxide multilayer cathode. / Ryu, Seung Yoon; Noh, Joo Hyon; Hwang, Byoung Har; Kim, Chang Su; Jo, Sung Jin; Kim, Jong Tae; Hwang, Hyeon Seok; Baik, Hong Koo; Jeong, Hee Seong; Lee, Chang Ho; Song, Seung Yong; Choi, Seung Ho; Park, Si Young.

In: Applied Physics Letters, Vol. 92, No. 2, 023306, 28.01.2008.

Research output: Contribution to journalArticle

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AU - Ryu, Seung Yoon

AU - Noh, Joo Hyon

AU - Hwang, Byoung Har

AU - Kim, Chang Su

AU - Jo, Sung Jin

AU - Kim, Jong Tae

AU - Hwang, Hyeon Seok

AU - Baik, Hong Koo

AU - Jeong, Hee Seong

AU - Lee, Chang Ho

AU - Song, Seung Yong

AU - Choi, Seung Ho

AU - Park, Si Young

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