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:
Oct. 22, 2013
Filed:
Feb. 22, 2006
Sang Tae Park, Gyeonggi-do, KR;
Myung Seop Kim, Seoul, KR;
Jeong Dae Seo, Gyeonggi-do, KR;
Eun Soo Cha, Gyeonggi-do, KR;
Jae Man Lee, Seoul, KR;
Chang Je Sung, Seoul, KR;
Sang Tae Park, Gyeonggi-do, KR;
Myung Seop Kim, Seoul, KR;
Jeong Dae Seo, Gyeonggi-do, KR;
Eun Soo Cha, Gyeonggi-do, KR;
Jae Man Lee, Seoul, KR;
Chang Je Sung, Seoul, KR;
LG Display Co., Ltd., Seoul, KR;
Abstract
An organic electroluminescent (EL) device having improved efficiency and service life is provided. The organic electroluminescent device has a stack structure including an emitting layer and an electron-transport layer positioned between an anode and a cathode. The electron-transport layer includes a first layer adjacent to the emitting layer which may be a mixture of at least two materials, and a second layer adjacent to the cathode which may be a mixture of at least two materials. The mixture of at least two materials may be a mixture of an organic compound and one or more other organic compounds, or may be a mixture of a metal or inorganic compound and one or more other metal or inorganic compounds, or may be a mixture of one or more organic compounds and one or more metal or inorganic compounds.