Title:
LIGHT EMITTING DEVICE AND METHOD FOR MANUFACTURING LIGHT EMITTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/105027
Kind Code:
A1
Abstract:
According to the present invention, a positive electrode (2), a hole injection layer (3), a hole transport layer (4), a light emitting layer (5), an electron transport layer (6) and a negative electrode (7) are formed on a transparent substrate (1). The light emitting layer (5) has a large number of quantum dots (8) dispersed therein, and a hole transport material (9) is present among the quantum dots (8) in a dispersed manner. A quantum dot dispersion solution in which the quantum dots (8) are dispersed and a hole transport solution which contains a soluble hole transport material that is soluble in the quantum dot dispersion solution and has hole transport properties are prepared; and after forming a hole transport coating film by applying the hole transport solution over the hole injection layer (3), the quantum dot dispersion solution is applied over the hole transport coating film so that the soluble hole transport material is dissolved in the quantum dot dispersion solution, thereby forming the hole transport layer (4) and the light emitting layer (5) at the same time. Consequently, there are achieved, at low cost: a light emitting device which has good luminous efficiency and emission color purity and can be decreased in the driving voltage, and wherein the recombination probability within the quantum dots can be improved; and a method for manufacturing this light emitting device.
Inventors:
MURAYAMA KOJI (JP)
MIYATA HARUYA (JP)
MIYATA HARUYA (JP)
Application Number:
PCT/JP2014/084549
Publication Date:
July 16, 2015
Filing Date:
December 26, 2014
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H05B33/14; B82Y20/00; C09K11/06; C09K11/08; H05B33/10; H05B33/22
Domestic Patent References:
| WO2012128173A1 | 2012-09-27 | |||
| WO2012053398A1 | 2012-04-26 |
Foreign References:
| JP2009099967A | 2009-05-07 | |||
| JP2013157180A | 2013-08-15 | |||
| JP2009099563A | 2009-05-07 | |||
| JP2009087744A | 2009-04-23 |
Attorney, Agent or Firm:
KUNIHIRO YASUTOSHI (JP)
Kunihiro Yasutoshi (JP)
Kunihiro Yasutoshi (JP)
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