دورية أكاديمية
Impact of GaAs(100) surface preparation on EQE of AZO/Al2O3/p-GaAs photovoltaic structures
| العنوان: | Impact of GaAs(100) surface preparation on EQE of AZO/Al2O3/p-GaAs photovoltaic structures |
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| المؤلفون: | Piotr Caban, Rafał Pietruszka, Jarosław Kaszewski, Monika Ożga, Bartłomiej S. Witkowski, Krzysztof Kopalko, Piotr Kuźmiuk, Katarzyna Gwóźdź, Ewa Płaczek-Popko, Krystyna Lawniczak-Jablonska, Marek Godlewski |
| المصدر: | Beilstein Journal of Nanotechnology, Vol 12, Iss 1, Pp 578-592 (2021) |
| بيانات النشر: | Beilstein-Institut, 2021. |
| سنة النشر: | 2021 |
| المجموعة: | LCC:Technology LCC:Chemical technology LCC:Science LCC:Physics |
| مصطلحات موضوعية: | atomic layer deposition, external quantum efficiency, gallium arsenide, photovoltaics, surface passivation, Technology, Chemical technology, TP1-1185, Science, Physics, QC1-999 |
| الوصف: | In order to effectively utilize the photovoltaic properties of gallium arsenide, its surface/interface needs to be properly prepared. In the experiments described here we examined eight different paths of GaAs surface treatment (cleaning, etching, passivation) which resulted in different external quantum efficiency (EQE) values of the tested photovoltaic (PV) cells. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) examinations were conducted to obtain structural details of the devices. X-ray photoelectron spectroscopy (XPS) with depth profiling was used to examine interface structure and changes in the elemental content and chemical bonds. The photoluminescence (PL) properties and bandgap measurements of the deposited layers were also reported. The highest EQE value was obtained for the samples initially etched with a citric acid-based etchant and, in the last preparation step, either passivated with ammonium sulfide aqueous solution or treated with ammonium hydroxide solution with no final passivation. Subsequent I–V measurements, however, confirmed that from these samples, only the sulfur-passivated ones provided the highest current density. The tested devices were fabricated by using the ALD method. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2190-4286 |
| Relation: | https://doaj.org/toc/2190-4286 |
| DOI: | 10.3762/bjnano.12.48 |
| URL الوصول: | https://doaj.org/article/bf2dc07e7e89420c8fdc2ab159b677bc |
| رقم الأكسشن: | edsdoj.bf2dc07e7e89420c8fdc2ab159b677bc |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 21904286 |
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| DOI: | 10.3762/bjnano.12.48 |