Mechanistic study on the synthesis of Cd-free quantum dots with improved size distribution = 비카드뮴계 양자점의 입자 균일도 개선을 위한 합성 메커니즘 연구

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Growth of monodisperse InP quantum dots (QDs) is a pressing requirement in display applications, as the size uniformity is related to color purity in display products. This study reports the colloidal synthesis of InP QDs in the presence of Zn precursors, in which size uniformity is markedly enhanced as compared to the case of InP QDs synthesized without Zn precursors. The nuclear magnetic resonance spectroscopy and mass spectrometry analyses on aliquots taken during the synthesis allowed monitoring the appearance of metal-phosphorus complex intermediates in the growth of InP QDs. In the presence of zinc carboxylate, intermediate species containing Zn-P bonding appears. The Zn-P intermediate complex with $P(SiMe_3)_3$ exhibits lower reactivity than In-P complex, which is corroborated by predictions based on density functional theory and electrostatic potential charge analysis. The formation of stable Zn-P intermediate complex results in lower reactivity, hence monodisperse QDs. Insights from the experimental and theoretical studies advance the mechanistic understanding and controlling of nucleation and growth of InP QDs, key to the preparation of monodisperse InP-based QDs in meeting the demand of display market.
Advisors
Lee, Doh Changresearcher이도창researcher
Description
한국과학기술원 :생명화학공학과,
Publisher
한국과학기술원
Issue Date
2018
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2018.2,[iii, 41 p. :]

Keywords

quantum dots▼aindium phosphide▼asize distribution▼aintermediate complex▼adisplay; 양자점▼a인화 인듐▼a입자 균일도▼a중간 복합체▼a디스플레이

URI
http://hdl.handle.net/10203/266335
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=733875&flag=dissertation
Appears in Collection
CBE-Theses_Master(석사논문)
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