Enhanced radiative and thermal properties from surface encapsulation of InAs nanowires

Xinxin Li; Alexander C Walhof; Weitao Dai; Ilke Arslan; Yuzi Liu; Fatima Toor; John P Prineas

doi:10.1364/OME.412956

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Enhanced radiative and thermal properties from surface encapsulation of InAs nanowires

Journal article

Open access

Peer reviewed

Enhanced radiative and thermal properties from surface encapsulation of InAs nanowires

Xinxin Li, Alexander C Walhof, Weitao Dai, Ilke Arslan, Yuzi Liu, Fatima Toor and John P Prineas

Optical materials express, Vol.11(3), pp.719-728

03/01/2021

DOI: 10.1364/OME.412956

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Abstract

In this work, photoluminescence (PL), quantum efciency and carrier dynamics are investigated in indium arsenide (InAs) nanowires (NWs) with various surface treatments, including a molecular beam epitaxy (MBE)-grown semiconductor shell passivation, sulfur-passivation, alumina (Al2O3) coating by atomic layer deposition (ALD) and polydimethylsiloxane (PDMS) spin-coating. The ALD-dielectric layer-coated InAs core-shell NWs show a maximum 13-fold increase in PL intensity. In contrast to the previous reports, this enhancement is found to be due to increased radiative rate from an enhanced Purcell factor, better thermal conductance and higher carrier injection within the NWs instead of improved surface quality. Numeric simulations confrm the experimentally observed increased radiative rate. Further improvements are suggested with even thicker capped InAs NWs. Carrier lifetime in surface-treated NWs is extended and shows long-term stability, critical for practical devices.

Details

Title: Subtitle: Enhanced radiative and thermal properties from surface encapsulation of InAs nanowires
Creators: Xinxin Li - University of Iowa
Alexander C Walhof - University of Iowa
Weitao Dai - University of Iowa
Ilke Arslan - Argonne National Laboratory
Yuzi Liu - Argonne National Laboratory
Fatima Toor - University of Iowa
John P Prineas - University of Iowa
Resource Type: Journal article
Publication Details: Optical materials express, Vol.11(3), pp.719-728
DOI: 10.1364/OME.412956
ISSN: 2159-3930
eISSN: 2159-3930
Grant note: DOI: 10.13039/100006151, name: Basic Energy Sciences, award: DE-AC02-06CH11357; DOI: 10.13039/100006132, name: Office of Science, award: DE-AC02-06CH11357; DOI: 10.13039/100000015, name: U.S. Department of Energy, award: DE-AC02-06CH11357; DOI: 10.13039/100000001, name: National Science Foundation, award: EPMD-1608714
Language: English
Date published: 03/01/2021
Academic Unit: Physics and Astronomy; Electrical and Computer Engineering; Iowa Technology Institute; Holden Comprehensive Cancer Center
Record Identifier: 9984197554602771

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