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Interface Morphology in Organic Light‐Emitting Diodes
Author(s) -
GoncalvesConto Sylvie,
Carrard Michel,
SiAhmed Lynda,
Zuppiroli Libero
Publication year - 1999
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/(sici)1521-4095(199902)11:2<112::aid-adma112>3.0.co;2-z
Subject(s) - materials science , substrate (aquarium) , oled , morphology (biology) , diffusion , optoelectronics , light emitting diode , common emitter , diode , dissipation , chemical engineering , nanotechnology , layer (electronics) , thermodynamics , biology , genetics , oceanography , physics , geology , engineering
Heat dissipation can be a problem in organic LEDs , leading to high working temperatures. The SEM study reported here shows that the temperature‐variable morphology of an electroactive film—the Figure shows the efficient blue emitter N , N ′‐diethyl‐3,3′‐bicarbazyl deposited at 70 °C on a bare ITO substrate—depends essentially on how well the film wets the substrate and on the diffusion of the organic molecules on the substrate.