Energy-Dependent Time-Resolved Photoluminescence of Self-Catalyzed InN Nanocolumns

In this study, we report the optical properties and carrier dynamics of different surface dimensionality n-type wurtzite InN with various carrier concentrations using photoluminescence (PL) and an energy-dependent, time-resolved photoluminescence (ED-TRPL) analysis. Experimental results indicated th...

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Published in:Catalysts 2021-06, Vol.11 (6), p.737
Main Authors: Lai, Fang-I, Yang, Jui-Fu, Chen, Wei-Chun, Hsieh, Dan-Hua, Lin, Woei-Tyng, Hsu, Yu-Chao, Kuo, Shou-Yi
Format: Article
Language:English
Subjects:
Binding sites
Carrier density
Catalysts
Chemical reactions
Energy
Excitons
Free energy
Heat of formation
Indium
Localization
Morphology
Nanorods
Nitrogen
Optical properties
Photoluminescence
Point defects
Time dependence
Wurtzite
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cited_by cdi_FETCH-LOGICAL-c304t-cd44edd5d7c8df85ead19a49630626e07fa510bcaac07737cf17e0e5f7cb5cdf3
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container_end_page
container_issue 6
container_start_page 737
container_title Catalysts
container_volume 11
creator Lai, Fang-I
Yang, Jui-Fu
Chen, Wei-Chun
Hsieh, Dan-Hua
Lin, Woei-Tyng
Hsu, Yu-Chao
Kuo, Shou-Yi
description In this study, we report the optical properties and carrier dynamics of different surface dimensionality n-type wurtzite InN with various carrier concentrations using photoluminescence (PL) and an energy-dependent, time-resolved photoluminescence (ED-TRPL) analysis. Experimental results indicated that the InN morphology can be controlled by the growth temperature, from one-dimensional (1D) nanorods to two-dimensional (2D) films. Moreover, donor-like nitrogen vacancy (VN) is responsible for the increase in carrier concentration due to the lowest formation energies in the n-type InN samples. The PL results also reveal that the energies of emission peaks are higher in the InN samples with 2D features than that with 1D features. These anomalous transitions are explained as the recombination of Mahan excitons and localized holes, and further proved by a theoretical model, activation energy and photon energy-dependent lifetime analysis.
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subjects Binding sites
Carrier density
Catalysts
Chemical reactions
Energy
Excitons
Free energy
Heat of formation
Indium
Localization
Morphology
Nanorods
Nitrogen
Optical properties
Photoluminescence
Point defects
Time dependence
Wurtzite
title Energy-Dependent Time-Resolved Photoluminescence of Self-Catalyzed InN Nanocolumns
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