Impact of Graphene Monolayer on the Performance of Non-Conventional Silicon Heterojunction Solar Cells with MoOx Hole-Selective Contact

Author:

Ros Eloi1,Fernández Susana2ORCID,Ortega Pablo1,Taboada Elena3,Arnedo Israel34ORCID,Gandía José Javier2,Voz Cristóbal1

Affiliation:

1. Departamento de Ingeniería Electrónica, Universitat Politècnica de Catalunya (UPC), 08034 Barcelona, Spain

2. División de Energías Renovables, CIEMAT, Avda. Complutense 40, 28040 Madrid, Spain

3. das-Nano, Polígono Industrial Talluntxe II, Calle M-10, Tajonar, 31192 Navarra, Spain

4. Departamento Ingeniería Eléctrica, Electrónica y de Comunicación, Universidad Pública de Navarra, Campus Arrosadía, 31006 Pamplona, Spain

Abstract

In this work, a new design of transparent conductive electrode based on a graphene monolayer is evaluated. This hybrid electrode is incorporated into non-standard, high-efficiency crystalline silicon solar cells, where the conventional emitter is replaced by a MoOx selective contact. The device characterization reveals a clear electrical improvement when the graphene monolayer is placed as part of the electrode. The current–voltage characteristic of the solar cell with graphene shows an improved FF and Voc provided by the front electrode modification. Improved conductance values up to 5.5 mS are achieved for the graphene-based electrode, in comparison with 3 mS for bare ITO. In addition, the device efficiency improves by around 1.6% when graphene is incorporated on top. These results so far open the possibility of noticeably improving the contact technology of non-conventional photovoltaic technologies and further enhancing their performance.

Publisher

MDPI AG

Subject

General Materials Science

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