THE EFFECTS OF EMBEDDING MEDIUM AND SIZES ON THE OPTICAL ABSORTION IN VERTICALLY ALIGNED GAAS NANOWIRES ARRAY BASED PHOTOVOLTAIC SOLAR CELLS

1 DE LA CRUZ R.M.
Co-authors:
2 KANYINDA-MALU C. 1 MUÑOZ SANTIUSTE J.E. 1 SALAS E. 1 GARCÍA-TABARÉS E. 1 TARDÍO M. 1 ATHANASOPOULOS S. 1 GALIANA B.
Institutions:
1 University Carlos III of Madrid, Leganés (Madrid), Spain, EU, rmc@fis.uc3m.es
2 University Rey Juan Carlos, FCSJ, Madrid, Spain, EU, clement.kanyindamalu@urjc.es
Conference:
14th International Conference on Nanomaterials - Research & Application, OREA Congress Hotel Brno, Czech Republic, EU, October 19 - 21, 2022
Proceedings:
Proceedings 14th International Conference on Nanomaterials - Research & Application
Pages:
39-44
ISBN:
978-80-88365-09-9
ISSN:
2694-930X
Published:
23rd November 2022
Proceedings of the conference have already been published in Scopus and we are waiting for evaluation and potential indexing in Web of Science.
Metrics:
363 views / 169 downloads
Abstract

We theoretically investigate the effects of the surrounding media and sizes on the optical absorbance of a periodic square array of GaAs nanowires (NWs) as a candidate of photovoltaic solar cells. The filling media considered are: PMMA, Polycarbonate, Polystyrene and PVP, commonly used in the science and technology of semiconductors. The sizes considered are the NWs length and radius and the pitch array. The simulated system consists of a top layer of ITO, the active layer of GaAs NWs surrounded by an embedding medium and a substrate layer of Si. The system absorbance is modelled though the transfer matrix method; while the GaAs NWs with the embedding medium is considered as an effective medium modelled by Maxwell-Garnett theory. For s- and p-polarization, we find that the embedding medium effects on the absorbance spectra are scarcely perceptible compared with the size effects. Indeed, for longer and wider NWs and smaller pitches array, the absorbance values are greater around 600-1100 nm. These results are in good agreement with those reported in the literature by experiments and other sophisticated simulations in III-V semiconductor NWs.

Keywords: Absorption spectra, GaAs NWs array, Solar cells, Transfer matrix method, Maxwell-Garnett theory

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