Low pressure organic vapor phase deposition of small molecular weight organic light emitting device structures
作者:
M. A. Baldo,
V. G. Kozlov,
P. E. Burrows,
S. R. Forrest,
V. S. Ban,
B. Koene,
M. E. Thompson,
期刊:
Applied Physics Letters
(AIP Available online 1997)
卷期:
Volume 71,
issue 21
页码: 3033-3035
ISSN:0003-6951
年代: 1997
DOI:10.1063/1.120281
出版商: AIP
数据来源: AIP
摘要:
A new technique for the deposition of amorphous organic thin films, low pressure organic vapor phase deposition (LP-OVPD), was used to fabricate organic light emitting devices (OLEDs) consisting of a film of aluminum tris-(8 hydroxyquinoline)(Alq3)grown on the surface of a film ofN′-diphenyl-N,N′-bis(3-methylphenyl)1-1′biphenyl-4-4′diamine.The resulting heterojunction OLED was found to have a performance similar to conventional, small molecular weight OLEDs grown using thermal evaporation in vacuum. The LP-OVPD grown device has an external quantum efficiency of0.40±0.05&percent;and a turn-on voltage of approximately 6 V. The rapid throughput demonstrated with LP-OVPD has the potential to facilitate low cost mass production of conventional small molecule based OLEDs, and its use of low vacuum in a horizontal reactor lends itself to roll-to-roll deposition of organic films for many photonic device applications. ©1997 American Institute of Physics.
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