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Proceedings Paper

Fabrication and properties of hybrid polymer/small-molecular phosphorescent OLEDs based on poly(N-vinyl carbazole)
Author(s): Teng Xiao; Min Cai; Ying Chen; Ruth Shinar; Joseph Shinar
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Paper Abstract

The properties of phosphorescent fac tris(2-phenylpyridine) iridium [Ir(ppy3)]-doped poly(N-vinyl carbazole) (PVK)/4,7-diphenyl-1,10-phenanthroline (Bphen) polymer/small molecular hybrid OLEDs are described. For optimal BPhen thickness, the power efficiency of the devices exceeds 30 lm/W. The low-temperature electroluminescence- detected magnetic resonance (ELDMR) exhibits the well-known negative spin 1/2 resonance attributed to enhanced formation of trions, but the positive spin 1/2 resonance, typically observed at low temperature or at high current density, is not observed. The OLEDs' performance and the ELDMR results are discussed in relation to the nature of the defects and their density in these devices.

Paper Details

Date Published: 27 August 2009
PDF: 12 pages
Proc. SPIE 7415, Organic Light Emitting Materials and Devices XIII, 741521 (27 August 2009); doi: 10.1117/12.828336
Show Author Affiliations
Teng Xiao, Iowa State Univ. (United States)
Min Cai, Iowa State Univ. (United States)
Ying Chen, Iowa State Univ. (United States)
Ruth Shinar, Iowa State Univ. (United States)
Joseph Shinar, Iowa State Univ. (United States)

Published in SPIE Proceedings Vol. 7415:
Organic Light Emitting Materials and Devices XIII
Franky So; Chihaya Adachi, Editor(s)

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