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Title: Low-Temperature Hydrothermal Synthesis of Colloidal Crystal Templated Nanostructured Single-Crystalline ZnO

Abstract

Single crystal semiconductors almost always exhibit better optoelectrical properties than their polycrystalline or amorous counterparts. While three-dimensionally (3D) nanostructured semiconductor devices have been proposed for numerous applications, in the vast majority of reports, the semiconductor is polycrystalline or amorphous, greatly reducing the potential for advanced properties. While technologies for 3D structuring of semiconductors via use of a 3D template have advanced significantly, approaches for epitaxially growing nanostructured single crystal semiconductors within a template remain limited. Here, we demonstrate the epitaxial growth of 3D-structured ZnO through colloidal templates formed from 225 nm and 600 nm diameter colloidal particles via a low-temperature (~80 °C) hydrothermal process using a flow reactor. The effects of the pH of the reaction solution as well as the additive used on the 3D epitaxy process are investigated. The optical and electrical properties of the epitaxially grown nanostructured ZnO are probed by reflectance, photoluminescence, and Hall effect measurements. It is found that the epitaxially grown nanostructured ZnO generally exhibits superior properties than those of polycrystalline ZnO. The demonstrated hydrothermal epitaxy process should be applicable to other chemical solution-based deposition techniques and help extend the range of materials that can be grown into a 3D nanostructured single-crystalline form.

Authors:
ORCiD logo [1];  [2];  [2];  [2]; ORCiD logo [3]
  1. Kyoto Univ. (Japan); Univ. of Illinois at Urbana-Champaign, IL (United States)
  2. Kyoto Univ. (Japan)
  3. Univ. of Illinois at Urbana-Champaign, IL (United States)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Light-Material Interactions in Energy Conversion (LMI)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1470417
Grant/Contract Number:  
[SC0001293]
Resource Type:
Accepted Manuscript
Journal Name:
Chemistry of Materials
Additional Journal Information:
[ Journal Volume: 29; Journal Issue: 22; Related Information: LMI partners with California Institute of Technology (lead); Harvard University; University of Illinois, Urbana-Champaign; Lawrence Berkeley National Laboratory]; Journal ID: ISSN 0897-4756
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; solar (photovoltaic), solid state lighting, phonons, thermal conductivity, electrodes - solar, materials and chemistry by design, optics, synthesis (novel materials), synthesis (self-assembly)

Citation Formats

Miyake, Masao, Suginohara, Makoto, Narahara, Naoto, Hirato, Tetsuji, and Braun, Paul V. Low-Temperature Hydrothermal Synthesis of Colloidal Crystal Templated Nanostructured Single-Crystalline ZnO. United States: N. p., 2017. Web. doi:10.1021/acs.chemmater.7b03466.
Miyake, Masao, Suginohara, Makoto, Narahara, Naoto, Hirato, Tetsuji, & Braun, Paul V. Low-Temperature Hydrothermal Synthesis of Colloidal Crystal Templated Nanostructured Single-Crystalline ZnO. United States. doi:10.1021/acs.chemmater.7b03466.
Miyake, Masao, Suginohara, Makoto, Narahara, Naoto, Hirato, Tetsuji, and Braun, Paul V. Thu . "Low-Temperature Hydrothermal Synthesis of Colloidal Crystal Templated Nanostructured Single-Crystalline ZnO". United States. doi:10.1021/acs.chemmater.7b03466. https://www.osti.gov/servlets/purl/1470417.
@article{osti_1470417,
title = {Low-Temperature Hydrothermal Synthesis of Colloidal Crystal Templated Nanostructured Single-Crystalline ZnO},
author = {Miyake, Masao and Suginohara, Makoto and Narahara, Naoto and Hirato, Tetsuji and Braun, Paul V.},
abstractNote = {Single crystal semiconductors almost always exhibit better optoelectrical properties than their polycrystalline or amorous counterparts. While three-dimensionally (3D) nanostructured semiconductor devices have been proposed for numerous applications, in the vast majority of reports, the semiconductor is polycrystalline or amorphous, greatly reducing the potential for advanced properties. While technologies for 3D structuring of semiconductors via use of a 3D template have advanced significantly, approaches for epitaxially growing nanostructured single crystal semiconductors within a template remain limited. Here, we demonstrate the epitaxial growth of 3D-structured ZnO through colloidal templates formed from 225 nm and 600 nm diameter colloidal particles via a low-temperature (~80 °C) hydrothermal process using a flow reactor. The effects of the pH of the reaction solution as well as the additive used on the 3D epitaxy process are investigated. The optical and electrical properties of the epitaxially grown nanostructured ZnO are probed by reflectance, photoluminescence, and Hall effect measurements. It is found that the epitaxially grown nanostructured ZnO generally exhibits superior properties than those of polycrystalline ZnO. The demonstrated hydrothermal epitaxy process should be applicable to other chemical solution-based deposition techniques and help extend the range of materials that can be grown into a 3D nanostructured single-crystalline form.},
doi = {10.1021/acs.chemmater.7b03466},
journal = {Chemistry of Materials},
number = [22],
volume = [29],
place = {United States},
year = {2017},
month = {10}
}

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