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Low Pressure Organic Vapor Phase Deposition of Small Molecular Weight Organic Device Structures

Published online by Cambridge University Press:  10 February 2011

M. Baldo ,
V. G. Kozlov ,
P. E. Burrows ,
S. R. Forrest ,
V. S. Ban ,
B. Koene  and
M. E. Thompson
M. Baldo
Affiliation:
Department of Electrical Engineering, Center for Photonics and Optoelectronic Materials, and Princeton Materials Institute, Princeton University, Princeton, New Jersey
V. G. Kozlov
Affiliation:
Department of Electrical Engineering, Center for Photonics and Optoelectronic Materials, and Princeton Materials Institute, Princeton University, Princeton, New Jersey
P. E. Burrows
Affiliation:
Department of Electrical Engineering, Center for Photonics and Optoelectronic Materials, and Princeton Materials Institute, Princeton University, Princeton, New Jersey
S. R. Forrest
Affiliation:
Department of Electrical Engineering, Center for Photonics and Optoelectronic Materials, and Princeton Materials Institute, Princeton University, Princeton, New Jersey
V. S. Ban
Affiliation:
PD-LD Inc., 209 Wall Street, Princeton, New Jersey 08544
B. Koene
Affiliation:
Department of Chemistry, University of Southern California, Los Angeles, CA 90089–0744
M. E. Thompson
Affiliation:
Department of Chemistry, University of Southern California, Los Angeles, CA 90089–0744
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Abstract

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) and optically pumped organic lasers. The OLED consisted of a film of aluminum tris- (8 hydroxyquinoline) (Alq3) grown on the surface of a film of N'-diphenyl-N,N'-bis(3- methylphenyl)1–l'biphenyl-4–4'diamine (TPD). Growth on both glass and polyester substrates was accomplished and the resulting heterojunction devices were found to have a performance similar to conventional, small molecular weight OLEDs grown using thermal evaporation in vacuum. The LP-OVPD grown OLED has an external quantum efficiency of 0.40 ± 0.05% and a turn-on voltage of approximately 6V. The optically pumped organic laser consisted of a film of Alq3 doped with the laser dye, benzoic acid, 2-[6-(ethylamino)-3-(ethylimino)-2,7-dimethyl-3Hxanthen- 9-yl]-ethyl ester, monohydrochloride (Rhodamine 6G). The laser output was centered at approximately 610nm and the lasing threshold was 30μJcm−2. The rapid throughput of LP-OVPD and its use of low vacuum in a horizontal reactor demonstrate its potential to facilitate low cost, roll-to-roll deposition of organic films for many photonic device applications.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 488: Symposium J – Electrical, Optical & Magnetic Properties of Organic IV , 1997 , 587
Copyright
Copyright © Materials Research Society 1998

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References

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