Organic oxide/Al composite cathode in small molecular organic light-emitting diodes

Organic oxide/Al composite cathode in small molecular organic light-emitting diodes

This study addresses the feasibility of using an organic oxide/Al composite cathode to fabricate the small molecular organic light-emitting diodes (OLEDs). A supplementary organic buffer film is placed at the interface between the tris(8-hydroxyquinoline) aluminum (Alq3) and the organic oxide/Al com...

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Veröffentlicht in:Applied physics letters 2006-07, Vol.89 (5)
Hauptverfasser: Guo, Tzung-Fang, Yang, Fuh-Shun, Tsai, Zen-Jay, Wen, Ten-Chin, Wu, Ching-In, Chung, Chia-Tin
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container_issue 5
container_start_page
container_title Applied physics letters
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creator Guo, Tzung-Fang
Yang, Fuh-Shun
Tsai, Zen-Jay
Wen, Ten-Chin
Wu, Ching-In
Chung, Chia-Tin
description This study addresses the feasibility of using an organic oxide/Al composite cathode to fabricate the small molecular organic light-emitting diodes (OLEDs). A supplementary organic buffer film is placed at the interface between the tris(8-hydroxyquinoline) aluminum (Alq3) and the organic oxide/Al complex layers. Incorporating the rubrene/poly(ethylene glycol) dimethyl ether (PEGDE) buffer layers into the composite cathode structure markedly improves the performance of devices. The luminous efficiencies of Alq3-based OLEDs biased at ∼100mA∕cm2 are 4.8 and 5.1cd∕A for rubrene (50Å)/PEGDE (15Å)∕Al and rubrene (50Å)/PEGDE (15Å)∕LiF (5Å)∕Al cathode devices, and 1.3 and 3.8cd∕A for devices with Al and LiF (5Å)∕Al cathodes, respectively.
doi_str_mv 10.1063/1.2266571
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title Organic oxide/Al composite cathode in small molecular organic light-emitting diodes
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