Three-dimensional a-Si/a-Ge radial heterojunction near-infrared photovoltaic detector

Abstract In this work, three-dimensional (3D) radial heterojunction photodetectors (PD) were constructed over vertical crystalline Si nanowires (SiNWs), with stacked hydrogenated amorphous germanium (a-Ge:H)/a-Si:H thin film layer as absorbers. The hetero absorber layer is designed to benefit from t...

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Autores principales:	Xiaolin Sun, Ting Zhang, Linwei Yu, Ling Xu, Junzhuan Wang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2019
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f9224dce6086479a844eea524917014c
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spelling	oai:doaj.org-article:f9224dce6086479a844eea524917014c2021-12-02T13:35:12ZThree-dimensional a-Si/a-Ge radial heterojunction near-infrared photovoltaic detector10.1038/s41598-019-56374-22045-2322https://doaj.org/article/f9224dce6086479a844eea524917014c2019-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-019-56374-2https://doaj.org/toc/2045-2322Abstract In this work, three-dimensional (3D) radial heterojunction photodetectors (PD) were constructed over vertical crystalline Si nanowires (SiNWs), with stacked hydrogenated amorphous germanium (a-Ge:H)/a-Si:H thin film layer as absorbers. The hetero absorber layer is designed to benefit from the type-II band alignment at the a-Ge/a-Si hetero-interface, which could help to enable an automated photo-carrier separation without exterior power supply. By inserting a carefully controlled a-Si passivation layer between the a-Ge:H layer and the p-type SiNWs, we demonstrate first a convenient fabrication of a new hetero a-Ge/a-Si structure operating as self-powered photodetectors (PD) in the near-infrared (NIR) range up to 900 nm, indicating a potential to serve as low cost, flexible and high performance radial junction sensing units for NIR imaging and PD applications.Xiaolin SunTing ZhangLinwei YuLing XuJunzhuan WangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-7 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Xiaolin Sun Ting Zhang Linwei Yu Ling Xu Junzhuan Wang Three-dimensional a-Si/a-Ge radial heterojunction near-infrared photovoltaic detector
description	Abstract In this work, three-dimensional (3D) radial heterojunction photodetectors (PD) were constructed over vertical crystalline Si nanowires (SiNWs), with stacked hydrogenated amorphous germanium (a-Ge:H)/a-Si:H thin film layer as absorbers. The hetero absorber layer is designed to benefit from the type-II band alignment at the a-Ge/a-Si hetero-interface, which could help to enable an automated photo-carrier separation without exterior power supply. By inserting a carefully controlled a-Si passivation layer between the a-Ge:H layer and the p-type SiNWs, we demonstrate first a convenient fabrication of a new hetero a-Ge/a-Si structure operating as self-powered photodetectors (PD) in the near-infrared (NIR) range up to 900 nm, indicating a potential to serve as low cost, flexible and high performance radial junction sensing units for NIR imaging and PD applications.
format	article
author	Xiaolin Sun Ting Zhang Linwei Yu Ling Xu Junzhuan Wang
author_facet	Xiaolin Sun Ting Zhang Linwei Yu Ling Xu Junzhuan Wang
author_sort	Xiaolin Sun
title	Three-dimensional a-Si/a-Ge radial heterojunction near-infrared photovoltaic detector
title_short	Three-dimensional a-Si/a-Ge radial heterojunction near-infrared photovoltaic detector
title_full	Three-dimensional a-Si/a-Ge radial heterojunction near-infrared photovoltaic detector
title_fullStr	Three-dimensional a-Si/a-Ge radial heterojunction near-infrared photovoltaic detector
title_full_unstemmed	Three-dimensional a-Si/a-Ge radial heterojunction near-infrared photovoltaic detector
title_sort	three-dimensional a-si/a-ge radial heterojunction near-infrared photovoltaic detector
publisher	Nature Portfolio
publishDate	2019
url	https://doaj.org/article/f9224dce6086479a844eea524917014c
work_keys_str_mv	AT xiaolinsun threedimensionalasiageradialheterojunctionnearinfraredphotovoltaicdetector AT tingzhang threedimensionalasiageradialheterojunctionnearinfraredphotovoltaicdetector AT linweiyu threedimensionalasiageradialheterojunctionnearinfraredphotovoltaicdetector AT lingxu threedimensionalasiageradialheterojunctionnearinfraredphotovoltaicdetector AT junzhuanwang threedimensionalasiageradialheterojunctionnearinfraredphotovoltaicdetector
_version_	1718392712021934080

Three-dimensional a-Si/a-Ge radial heterojunction near-infrared photovoltaic detector

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