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Organic electroluminescent element, material for positive hole injecting layer, and organic electroluminescent display
   
Document Number
US Patent 7250227
Issued Date
July 31, 2007
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Abstract
The present invention relates to highly reliable organic EL elements that can provide higher luminance with lower voltage and exhibit lower leak current at negative biases and appropriate diode properties. The organic EL element comprises a positive hole injecting layer, and a perfluoropolyether compound is incorporated into the positive hole injecting layer. Preferably, the perfluoropolyether compound is expressed by formula (1) or (2), R.sup.1--Rf--R.sup.2 formula (1) Rf--R.sup.3 formula (2) in which, R.sup.1, R.sup.2, and R.sup.3 represents one of a hydrogen atom, a fluorine atom, and a substituted group; Rf represents the perfluoropolyether skeleton expressed by the formula (3), ##STR00001## in which, R.sup.4 and R.sup.5 represent general formula --C.sub.pF.sub.2p+1; n, m, x, and y are each an integer.
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Number of Claims:
11
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Published
July 31, 2007
Application Number
11/192,353
Filed
July 29, 2005
US Classification
428/690   257/E21.264 257/E51.028 257/E51.029 257/E51.031 257/E51.032 257/E51.034 257/E51.035 257/E51.043 257/E51.047 257/E51.049 257/E51.051 313/504 313/506 428/917
Int'l Classification
H01L   51/50   (20060101)  
Examiner
Parent Case
CROSS-REFERENCE TO RELATED APPLICATIONS This is a continuation of Application PCT/JP2003/000887, filed on Jan. 30, 2003.
USPTO Field of Search
428/690   428/917   428/414   313/504   313/506   257/40   257/88   257/103   257/E51.033   528/401   568/677  
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