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Priority claimed from JP2002076619Aexternal-prioritypatent/JP2003272857A/en
Priority claimed from PCT/JP2003/009525external-prioritypatent/WO2005011333A1/en
Application filed by Idemitsu Kosan CofiledCriticalIdemitsu Kosan Co
Publication of TW200506031ApublicationCriticalpatent/TW200506031A/en
A white electroluminescence element (1) comprising an anode (2), a blue light emitting layer (5) containing a host material and a blue dopant, yellow through red light emitting layer (6) containing a host material identical to that of the blue light emitting layer (5) and a yellow through red dopant, and a cathode (8), formed sequentially in layers, wherein the light emitting layer is composed of the blue light emitting layer (5) and the yellow through red light emitting layer (6). In a type where the light emitting layer is divided into two, trend of color shift toward red can be canceled by employing the blue light emitting layer (5) on the anode (2) side where the light emitting region of the emitting layer has a trend to shift. Since the yellow through red light emitting layer (6) can be formed thick, variation of chromaticity can be suppressed.
TW092121196A2002-03-192003-08-01White color group organic electroluminescent element
TW200506031A
(en)