Colloidal semiconductor heterostructures for light-emitting devices = 발광소자를 위한 반도체 이종나노구조체 연구

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Colloidal semiconductor heterostructures are efficient luminescent materials for light emitting applications based on their unique optical properties such as size-dependent band gap energy, narrow emission linewidth and high photoluminescence quantum yield (PL QY) and photochemical stability. Particularly, to boost the optical performance and efficiency of the light-emitting devices, high PL QY of colloidal semiconductor heterostructures is necessary. The common way to attain high quantum yield is passivating weak organic ligand and dangling bond on the surface of nanocrystal cores with wide bandgap semiconducting inorganic shell and called it as core/shell heterostructure. In this study, I discuss about the understanding and engineering of the relationship between optical properties and structure of nanocrystals via precise control of composition, electronic and morphological structure and surface and interface of nanocrystals. With this, I also demonstrate new heterostructures based on the coherently strained structures. For the perspective approach to commercialization of colloidal semiconductor heterostructure, I propose colloidal core/shell heterostructure with III-V/II-VI semiconductor heterovalent interface for highly luminescent cd-free nanocrystals.
Advisors
Lee, Doh Changresearcher이도창researcher
Description
한국과학기술원 :생명화학공학과,
Publisher
한국과학기술원
Issue Date
2019
Identifier
325007
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 생명화학공학과, 2019.2,[iii, 68 p. :]

Keywords

colloidal semiconductor nanocrystal▼asemiconductor heterostructure▼alight-emitting devices▼aphotoluminescence quantum yield▼asurface ligand; 용액상 반도체 나노결정▼a반도체 이종나노구조체▼a발광소자▼a형광양자효율▼a표면리간드

URI
http://hdl.handle.net/10203/264873
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=842486&flag=dissertation
Appears in Collection
CBE-Theses_Ph.D.(박사논문)
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