Title:
WHITE LIGHT QUANTUM DOTS BASED LIGHT EMITTING DIODE AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2018/062677
Kind Code:
A1
Abstract:
A white light quantum dots based light emitting diode and a manufacturing method therefor are disclosed. The white light quantum dots based light emitting diode according to an embodiment of the present invention comprises: a first electrode; a hole injection layer on the first electrode; a hole transport layer on the hole injection layer; an emission layer on the hole transport layer; an electron transport layer on the emission layer; and a second electrode on the electron transport layer, wherein the emission layer has red, green, and blue (RGB) quantum dots doped with a blue light emitting polymer. The blue light emitting polymer acts as a blue light emitting exciton and simultaneously improves brightness through a characteristic of energy transfer to the RGB quantum dots. According to an embodiment, the blue light emitting polymer includes a fluorene homo-polymer emitting light in a wavelength band of 440-490 nm. According to the present embodiment, a low blue light emitting efficiency problem of the white light quantum dots based light emitting diode can be resolved, and a high-brightness white light emitting characteristic can be obtained through the characteristic of energy transfer to the RGB quantum dots.
Inventors:
KANG SHIN-WON (KR)
LEE JUN-WOO (KR)
LEE JAE-SUNG (KR)
KIM SANG-HYUP (KR)
KANG BYOUNG HO (KR)
LEE SANG WON (KR)
LEE JUN-WOO (KR)
LEE JAE-SUNG (KR)
KIM SANG-HYUP (KR)
KANG BYOUNG HO (KR)
LEE SANG WON (KR)
Application Number:
PCT/KR2017/008472
Publication Date:
April 05, 2018
Filing Date:
August 04, 2017
Export Citation:
Assignee:
KYUNGPOOK NAT UNIV IND ACADEMIC COOP FOUND (KR)
International Classes:
H01L51/50; H01L51/52; H01L51/56
Foreign References:
| KR101560088B1 | 2015-10-13 | |||
| KR20140108440A | 2014-09-11 | |||
| KR20160065230A | 2016-06-09 |
Other References:
HUANG, C.-Y. ET AL: "Three-Band white light-emitting diodes based on hybridization of polyfluorene and colloidal CdSe-ZnS quantum dots", IEEE PHOTONICS TECHNOLOGY LETTERS, vol. 22, no. 5, 1 March 2010 (2010-03-01), pages 305 - 307, XP011299602, ISSN: 1041-1135
LEE, K.-H ET AL: "Highly efficient, color-pure, color-stable blue quantum dot light-emitting devices", ACS NANO, vol. 7, no. 8, 27 August 2013 (2013-08-27), pages 7295 - 7302, XP055603483, DOI: 10.1021/nn402870e
KIM, S.-H. ET AL: "High Efficiency White Light-Emitting Device Based on Quantum Dots/Polymer Hybrid Emissive Layer", INTERNATIONAL CONFERENCE ON ADVANCED MATERIAL SCIENCE AND ENVIRONMENTAL ENGINEERING (AMSEE 2016, 1 January 2016 (2016-01-01), pages 12 - 14, XP055603485, DOI: 10.2991/amsee-16.2016.4
LEE, J.-S.: "bright and efficient white hybrid quantum dot light-emitting devices by adjusting polymer distribution in quantum dots", THE 16TH INTERNATIONAL MEETING ON INFORMATION DISPLAY, 25 August 2016 (2016-08-25)
LEE, K.-H ET AL: "Highly efficient, color-pure, color-stable blue quantum dot light-emitting devices", ACS NANO, vol. 7, no. 8, 27 August 2013 (2013-08-27), pages 7295 - 7302, XP055603483, DOI: 10.1021/nn402870e
KIM, S.-H. ET AL: "High Efficiency White Light-Emitting Device Based on Quantum Dots/Polymer Hybrid Emissive Layer", INTERNATIONAL CONFERENCE ON ADVANCED MATERIAL SCIENCE AND ENVIRONMENTAL ENGINEERING (AMSEE 2016, 1 January 2016 (2016-01-01), pages 12 - 14, XP055603485, DOI: 10.2991/amsee-16.2016.4
LEE, J.-S.: "bright and efficient white hybrid quantum dot light-emitting devices by adjusting polymer distribution in quantum dots", THE 16TH INTERNATIONAL MEETING ON INFORMATION DISPLAY, 25 August 2016 (2016-08-25)
Attorney, Agent or Firm:
KWON, Hyuk-Soo et al. (KR)
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