Chen, LuLu;
Adeyemo, Stephanie O;
Fonseka, H Aruni;
Liu, Huiyun;
Kar, Srabani;
Yang, Hui;
Velichko, Anton;
... Zhang, Yunyan; + view all
(2022)
Long-Term Stability and Optoelectronic Performance Enhancement of InAsP Nanowires with an Ultrathin InP Passivation Layer.
Nano Letters
, 22
(8)
pp. 3433-3439.
10.1021/acs.nanolett.2c00805.
Preview |
Text
acs.nanolett.2c00805.pdf - Published Version Download (3MB) | Preview |
Abstract
The influence of nanowire (NW) surface states increases rapidly with the reduction of diameter and hence severely degrades the optoelectronic performance of narrow-diameter NWs. Surface passivation is therefore critical, but it is challenging to achieve long-term effective passivation without significantly affecting other qualities. Here, we demonstrate that an ultrathin InP passivation layer of 2-3 nm can effectively solve these challenges. For InAsP nanowires with small diameters of 30-40 nm, the ultrathin passivation layer reduces the surface recombination velocity by at least 70% and increases the charge carrier lifetime by a factor of 3. These improvements are maintained even after storing the samples in ambient atmosphere for over 3 years. This passivation also greatly improves the performance thermal tolerance of these thin NWs and extends their operating temperature from <150 K to room temperature. This study provides a new route toward high-performance room-temperature narrow-diameter NW devices with long-term stability.
| Type: | Article |
|---|---|
| Title: | Long-Term Stability and Optoelectronic Performance Enhancement of InAsP Nanowires with an Ultrathin InP Passivation Layer |
| Location: | United States |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/acs.nanolett.2c00805 |
| Publisher version: | https://doi.org/10.1021/acs.nanolett.2c00805 |
| Language: | English |
| Additional information: | © 2022 American Chemical Society. Original content in this article is licensed under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) Licence (https://creativecommons.org/licenses/by/4.0/). |
| Keywords: | long-term stability, photonic properties, surface passivation, thin nanowire, ultrathin InP |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10148538 |
Archive Staff Only
 |
View Item |
