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Coalescence Growth of II-VI Colloidal Semiconductor Nanocrystals and Their LEDs Applications

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Coalescence Growth of II-VI Colloidal Semiconductor Nanocrystals and Their LEDs Applications / Jiamin Huang.
Author:	Huang, Jiamin,
Description:	1 electronic resource (73 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 87-02, Section: B.
Contained By:	Dissertations Abstracts International87-02B.
Subject:	Quantum physics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=32262310
ISBN:	9798290955049

Coalescence Growth of II-VI Colloidal Semiconductor Nanocrystals and Their LEDs Applications
Huang, Jiamin,

Coalescence Growth of II-VI Colloidal Semiconductor Nanocrystals and Their LEDs Applications [electronic resource] /Jiamin Huang. - 1 electronic resource (73 pages)

Source: Dissertations Abstracts International, Volume: 87-02, Section: B.

This study systematically investigates the controlled synthesis of zinc-containing II-VI colloidal nanocrystals and the tuning of their optoelectronic properties. The high bond dissociation energy (BDE) of these materials makes them prone to forming strong, irreversible chemical bonds during high-temperature synthesis, posing significant challenges to their controllable growth. To address this, a novel growth control strategy based on a coalescence mechanism is proposed. By regulating ion-induced molten-phase transitions, controllable reorganization of chemical bonds is achieved. This approach enabled the successful synthesis of hexagonal ZnS, spherical ZnSe, and tetrahedral CdZnS nanocrystals.Furthermore, employing a high-temperature precursor-injection method, two types of type-II band-aligned quantum shell materials were synthesized: CdS/ZnSe/ZnS (quantum yield of 60%, yellow-green emission) and ZnS/ZnSe/ZnS (quantum yield of 29%, blue emission). However, transmission electron microscopy characterization revealed noticeable interfacial blurring between ZnSe and ZnS shell layers in materials prepared via conventional methods, indicating that shell crystallinity and interfacial quality still require improvement.For future work, we propose an innovative interface engineering strategy based on a coalescence mechanism in quantum shell synthesis. These materials, combining high brightness with excellent solution-processability, offer new material solutions for the development of high-performance light-emitting diodes (LEDs), demonstrating promising potential in next-generation display technologies.

English

ISBN: 9798290955049Subjects--Topical Terms:

1179090
Quantum physics.
Subjects--Index Terms:

Coalescence growth

Coalescence Growth of II-VI Colloidal Semiconductor Nanocrystals and Their LEDs Applications
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520 # $a This study systematically investigates the controlled synthesis of zinc-containing II-VI colloidal nanocrystals and the tuning of their optoelectronic properties. The high bond dissociation energy (BDE) of these materials makes them prone to forming strong, irreversible chemical bonds during high-temperature synthesis, posing significant challenges to their controllable growth. To address this, a novel growth control strategy based on a coalescence mechanism is proposed. By regulating ion-induced molten-phase transitions, controllable reorganization of chemical bonds is achieved. This approach enabled the successful synthesis of hexagonal ZnS, spherical ZnSe, and tetrahedral CdZnS nanocrystals.Furthermore, employing a high-temperature precursor-injection method, two types of type-II band-aligned quantum shell materials were synthesized: CdS/ZnSe/ZnS (quantum yield of 60%, yellow-green emission) and ZnS/ZnSe/ZnS (quantum yield of 29%, blue emission). However, transmission electron microscopy characterization revealed noticeable interfacial blurring between ZnSe and ZnS shell layers in materials prepared via conventional methods, indicating that shell crystallinity and interfacial quality still require improvement.For future work, we propose an innovative interface engineering strategy based on a coalescence mechanism in quantum shell synthesis. These materials, combining high brightness with excellent solution-processability, offer new material solutions for the development of high-performance light-emitting diodes (LEDs), demonstrating promising potential in next-generation display technologies.
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653 # # $a Colloidal semiconductor nanocrystals
653 # # $a Quantum shell
653 # # $a Bond dissociation energy
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