ORGANIC LIGHT-EMITTING DEVICE

PROBLEM TO BE SOLVED: To provide an organic light-emitting device in which high reliability and a long life can be expected by effectively preventing moisture absorption to a planarization film.SOLUTION: A planarization film 11, a coating film 20, a positive electrode 2, and a hole injection layer 4...

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Main Authors FUJIMURA SHINYA, NENDAI KENICHI, YAMADA RYUTA, KOMATSU TAKAHIRO, OUCHI AKIRA, FUJITA HIROSHI
Format Patent
LanguageEnglish
Published 10.09.2012
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
SEMICONDUCTOR DEVICES
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Summary:PROBLEM TO BE SOLVED: To provide an organic light-emitting device in which high reliability and a long life can be expected by effectively preventing moisture absorption to a planarization film.SOLUTION: A planarization film 11, a coating film 20, a positive electrode 2, and a hole injection layer 4 are formed on one surface of a substrate 10. The planarization film 11 is coated with the coating film 20. An organic light-emitting device 1 is constituted by laminating a hole transport layer 6A, a light-emitting layer 6B, and a negative electrode 8 sequentially on the hole injection layer 4. The coating film 20 and the hole injection layer 4 are tungsten oxide layers having a thickness of 2 nm or more deposited under certain deposition conditions, so as to have an electronic state where an occupied level exists in a range of bond energy which is 1.8-3.6 eV lower than the lowest bond energy in a valence band. A source electrode 17 and the positive electrode 2 are connected electrically with the coating film 20 interposed therebetween.
Bibliography:Application Number: JP20110031992