The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 11, 2013
Filed:
May. 14, 2009
Masayuki Katayama, Handa, JP;
Kazushige Kojima, Aichi-gun, JP;
Tetsuya Katoh, Anjo, JP;
Kunio Akedo, Nagoya, JP;
Toshikazu Satoh, Seto, JP;
Koji Noda, Ichinomiya, JP;
Tomohiko Mori, Aichi-gun, JP;
Yoshihiro Kikuzawa, Aichi-gun, JP;
Koichi Sakaguchi, Nagoya, JP;
Masayuki Katayama, Handa, JP;
Kazushige Kojima, Aichi-gun, JP;
Tetsuya Katoh, Anjo, JP;
Kunio Akedo, Nagoya, JP;
Toshikazu Satoh, Seto, JP;
Koji Noda, Ichinomiya, JP;
Tomohiko Mori, Aichi-gun, JP;
Yoshihiro Kikuzawa, Aichi-gun, JP;
Koichi Sakaguchi, Nagoya, JP;
DENSO CORPORATION, Kariya, JP;
Kabushiki Kaisha Toyota Chuo Kenkyusho, Nagakute-shi, JP;
Abstract
There is provided a polymer or low-molecular-weight compound multilayer type organic EL device configured such that a light-emitting layer formed on a hole transport layer includes a mixture of a polymer material and a low-molecular weight material. With such a configuration, the low-molecular-weight material added to the polymer material serves as a binder filling the gap of the steric hindrance to form entanglement of the polymer material and the low-molecular-weight material. This results in that the interface between the hole transport layer and the light-emitting layer is an interface high in adhesion and also high in carrier injectability. Further, optimization of the formation conditions and materials can achieve still higher reliability and longer lifetime.