Superior Performance of V2O5 as Hole Selective Contact over other Transition Metal Oxides in Silicon Heterojunction Solar Cells

Almora Rodriguez O, Gerling LG, Voz C, Alcubilla R, Puigdollers J, Garcia-Belmonte G (2017)


Publication Type: Journal article

Publication year: 2017

Journal

Book Volume: 168

Pages Range: 221-226

URI: http://www.sciencedirect.com/science/article/pii/S0927024817302118

DOI: 10.1016/j.solmat.2017.04.042

Abstract

Transition metal oxides (TMOs) have recently been proved to efficiently serve as hole-selective contacts in crystalline silicon (c-Si) heterojunction solar cells. In the present work, two TMO/c-Si heterojunctions are explored using MoO3 (reference) and V2O5 as to alternative candidate. It has been found that V2O5 devices present larger (16% improvement) power conversion efficiency mainly due to their higher open-circuit voltage. While V2O5 / c-Si devices with textured front surfaces also have short-circuit currents, it is also known that flat solar cell architectures allow for the V2O5/n-Si interface, giving significant carrier lifetimes of 200 μs (equivalent to a surface recombination velocity of Seff ~ 140 cm s-1) as derived from impedance analysis. As a consequence, a significant open-circuit voltage of 662 mV is achieved. It is found that, at the TMO/c-Si contact, a TMO work function enhancement ΔΦTMO occurs during the heterojunction formation with the consequent dipole layer enlargement Δ'= Δ + ΔΦTMO. TMO/c-Si contact energetics, carrier transport across the interface and surface TMO / c-Si heterojunctions.

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APA:

Almora Rodriguez, O., Gerling, L.G., Voz, C., Alcubilla, R., Puigdollers, J., & Garcia-Belmonte, G. (2017). Superior Performance of V2O5 as Hole Selective Contact over other Transition Metal Oxides in Silicon Heterojunction Solar Cells. Solar Energy Materials and Solar Cells, 168, 221-226. https://dx.doi.org/10.1016/j.solmat.2017.04.042

MLA:

Almora Rodriguez, Osbel, et al. "Superior Performance of V2O5 as Hole Selective Contact over other Transition Metal Oxides in Silicon Heterojunction Solar Cells." Solar Energy Materials and Solar Cells 168 (2017): 221-226.

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