DEFECT-SUPPRESSED METAL HALIDE PEROVSKITE LUMINESCENT MATERIAL, AND LIGHT-EMITTING DIODE COMPRISING SAME

Title:

DEFECT-SUPPRESSED METAL HALIDE PEROVSKITE LUMINESCENT MATERIAL, AND LIGHT-EMITTING DIODE COMPRISING SAME

Document Type and Number:

WIPO Patent Application WO/2021/125412

Kind Code:

A1

Abstract:

The present invention relates to a defect-suppressed metal halide perovskite luminescent material, and a wavelength conversion body and light-emitting diode comprising same. According to the present invention, medium-sized monovalent organic cations (A2) comprised inside perovskite crystals can stabilize the perovskite crystals and inhibit defect formation inside the crystals by means of an entropic effect, and an excess amount of A2 cations not included inside the perovskite crystals form a structure surrounding perovskite nanocrystal particles to passivate defects forming on the surface of the perovskite nanocrystal particles, thereby enhancing photoluminescence quantum efficiency, luminescence life and stability. Therefore, the present invention can be utilized for a wavelength conversion layer or a light-emitting layer of a light-emitting diode.

Inventors:

LEE TAE-WOO (KR)
KIM JOO SUNG (KR)
KIM SUNGJIN (KR)
HEO JUNG MIN (KR)
KIM YOUNG-HOON (KR)
PARK JIN WOO (KR)

Application Number:

PCT/KR2019/018289

Publication Date:

June 24, 2021

Filing Date:

December 23, 2019

Export Citation:

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Assignee:

SEOUL NAT UNIV R&DB FOUNDATION (KR)

International Classes:

C09K11/08; H01L51/00; H01L51/50

Foreign References:

KR20190109081A	2019-09-25
KR101746336B1	2017-06-13
KR101746335B1	2017-06-21
KR101746337B1	2017-06-21
KR20160054735A	2016-05-17