Gas Sensing with Solar Cells: The Case of NH<sub>3</sub> Detection through Nanocarbon/Silicon Hybrid Heterojunctions
Photovoltaic (PV) cells based on single-walled carbon nanotube (SWCNT)/silicon (Si) and multiwalled carbon nanotube (MWCNT)/Si junctions were tested under exposure to NH<sub>3</sub> in the 0–21 ppm concentration range. The PV cell parameters remarkably changed upon NH<sub>3</sub...
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doaj-e9f7267dca604c97ba1ccd60ebc0ea892020-11-25T04:00:25ZengMDPI AGNanomaterials2079-49912020-11-01102303230310.3390/nano10112303Gas Sensing with Solar Cells: The Case of NH<sub>3</sub> Detection through Nanocarbon/Silicon Hybrid HeterojunctionsGiovanni Drera0Sonia Freddi1Tiziano Freddi2Andrea De Poli3Stefania Pagliara4Maurizio De Crescenzi5Paola Castrucci6Luigi Sangaletti7I-Lamp and Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore, via dei Musei 41, 25121 Brescia, ItalyI-Lamp and Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore, via dei Musei 41, 25121 Brescia, ItalyI-Lamp and Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore, via dei Musei 41, 25121 Brescia, ItalyI-Lamp and Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore, via dei Musei 41, 25121 Brescia, ItalyI-Lamp and Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore, via dei Musei 41, 25121 Brescia, ItalyDipartimento di Fisica, Università di Roma Tor Vergata, 00133 Roma, ItalyDipartimento di Fisica, Università di Roma Tor Vergata, 00133 Roma, ItalyI-Lamp and Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore, via dei Musei 41, 25121 Brescia, ItalyPhotovoltaic (PV) cells based on single-walled carbon nanotube (SWCNT)/silicon (Si) and multiwalled carbon nanotube (MWCNT)/Si junctions were tested under exposure to NH<sub>3</sub> in the 0–21 ppm concentration range. The PV cell parameters remarkably changed upon NH<sub>3</sub> exposure, suggesting that these junctions, while being operated as PV cells, can react to changes in the environment, thereby acting as NH<sub>3</sub> gas sensors. Indeed, by choosing the open-circuit voltage, V<sub>OC</sub>, parameter as read-out, it was found that these cells behaved as gas sensors, operating at room temperature with a response higher than chemiresistors developed on the same layers. The sensitivity was further increased when the whole current–voltage (I–V) curve was collected and the maximum power values were tracked upon NH<sub>3</sub> exposure.https://www.mdpi.com/2079-4991/10/11/2303carbon nanotubesPV cellsCNT/Si heterojunctionsgas sensingNH<sub>3</sub> |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Giovanni Drera Sonia Freddi Tiziano Freddi Andrea De Poli Stefania Pagliara Maurizio De Crescenzi Paola Castrucci Luigi Sangaletti |
spellingShingle |
Giovanni Drera Sonia Freddi Tiziano Freddi Andrea De Poli Stefania Pagliara Maurizio De Crescenzi Paola Castrucci Luigi Sangaletti Gas Sensing with Solar Cells: The Case of NH<sub>3</sub> Detection through Nanocarbon/Silicon Hybrid Heterojunctions Nanomaterials carbon nanotubes PV cells CNT/Si heterojunctions gas sensing NH<sub>3</sub> |
author_facet |
Giovanni Drera Sonia Freddi Tiziano Freddi Andrea De Poli Stefania Pagliara Maurizio De Crescenzi Paola Castrucci Luigi Sangaletti |
author_sort |
Giovanni Drera |
title |
Gas Sensing with Solar Cells: The Case of NH<sub>3</sub> Detection through Nanocarbon/Silicon Hybrid Heterojunctions |
title_short |
Gas Sensing with Solar Cells: The Case of NH<sub>3</sub> Detection through Nanocarbon/Silicon Hybrid Heterojunctions |
title_full |
Gas Sensing with Solar Cells: The Case of NH<sub>3</sub> Detection through Nanocarbon/Silicon Hybrid Heterojunctions |
title_fullStr |
Gas Sensing with Solar Cells: The Case of NH<sub>3</sub> Detection through Nanocarbon/Silicon Hybrid Heterojunctions |
title_full_unstemmed |
Gas Sensing with Solar Cells: The Case of NH<sub>3</sub> Detection through Nanocarbon/Silicon Hybrid Heterojunctions |
title_sort |
gas sensing with solar cells: the case of nh<sub>3</sub> detection through nanocarbon/silicon hybrid heterojunctions |
publisher |
MDPI AG |
series |
Nanomaterials |
issn |
2079-4991 |
publishDate |
2020-11-01 |
description |
Photovoltaic (PV) cells based on single-walled carbon nanotube (SWCNT)/silicon (Si) and multiwalled carbon nanotube (MWCNT)/Si junctions were tested under exposure to NH<sub>3</sub> in the 0–21 ppm concentration range. The PV cell parameters remarkably changed upon NH<sub>3</sub> exposure, suggesting that these junctions, while being operated as PV cells, can react to changes in the environment, thereby acting as NH<sub>3</sub> gas sensors. Indeed, by choosing the open-circuit voltage, V<sub>OC</sub>, parameter as read-out, it was found that these cells behaved as gas sensors, operating at room temperature with a response higher than chemiresistors developed on the same layers. The sensitivity was further increased when the whole current–voltage (I–V) curve was collected and the maximum power values were tracked upon NH<sub>3</sub> exposure. |
topic |
carbon nanotubes PV cells CNT/Si heterojunctions gas sensing NH<sub>3</sub> |
url |
https://www.mdpi.com/2079-4991/10/11/2303 |
work_keys_str_mv |
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