Title:
White electroluminescence device
Document Type and Number:
Japanese Patent JP6136175
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a white electroluminescent device having high luminous efficiency and a long life, especially a white light-emitting white electroluminescent device having excellent productivity and stable color chromaticity even in continuous production.SOLUTION: A white electroluminescent device comprises one light-emitting layer sandwiched between an anode and a cathode. The light-emitting layer includes one or more quantum dots (BQD) having a maximum luminescent wavelength of 400 nm to 500 nm, one or more quantum dots (GYQD) having a maximum luminescent wavelength of 500 nm to 580 nm, and one or more quantum dots (ORQD) having a maximum luminescent wavelength of 580 nm to 650 nm. A mass ratio in a light-emitting layer of each quantum dot is within a specific range. PL emission quantum yields of at least two or more quantum dots among the BQD, GYQD, and ORQD are not less than 70%.
Inventors:
Ikemizu Dai
Yasushi Okubo
High Hideo
Yasushi Okubo
High Hideo
Application Number:
JP2012225048A
Publication Date:
May 31, 2017
Filing Date:
October 10, 2012
Export Citation:
Assignee:
Konica Minolta Co., Ltd.
International Classes:
H05B33/14; C07D471/04; C09K11/06; H01L51/50
Domestic Patent References:
| JP2009527099A | ||||
| JP2005038634A | ||||
| JP2009099545A |
Foreign References:
| WO2008063652A1 | ||||
| WO2012013272A1 | ||||
| WO2012121101A1 |
Attorney, Agent or Firm:
Gwangyang International Patent Office
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