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arXiv · 1508.00223

Broadband perfect light trapping in the thinnest monolayer graphene-MoS$_{2}$ photovoltaic cell

Yun-Beng Wu·Weng Yang·Tong-Biao Wang·Xin-Hua Deng·Jiang-Tao Liu
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Abstract

The light absorption of a monolayer graphene-molybdenum disulfide photovoltaic (GM-PV) cell in a wedge-shaped microcavity with a spectrum-splitting structure is investigated theoretically. The GM-PV cell, which is three times thinner than the traditional photovoltaic cell, exhibits up to 98\% light absorptivity in a wide wavelength range. This rate exceeds the fundamental limit of nanophotonic light trapping in solar cells. The effects of defect layer thickness, GM-PV cell position in the microcavity, incident angle, and lens aberration on the light absorption rate of the GM-PV cell is explored. Regardless of errors, the GM-PV cell can still achieve at least 90\% light absorptivity with the current technology. Our proposal provides different methods to design light-trapping structures and apply spectrum-splitting systems.

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Yun-Beng Wu, Weng Yang, Tong-Biao Wang, Xin-Hua Deng, Jiang-Tao Liu. 2015-08-02. Broadband perfect light trapping in the thinnest monolayer graphene-MoS$_{2}$ photovoltaic cell. https://arxiv.org/abs/1508.00223

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