Array of Graphene Solar Cells on 100 mm Silicon Wafers for Power Systems

Syed M. Rahman, Md R. Kabir, Tamzeed B. Amin, James M. Mangum, Ashaduzzaman and Paul M. Thibado ()
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Syed M. Rahman: Materials Science and Engineering, University of Arkansas, Fayetteville, AR 72701, USA
Md R. Kabir: Materials Science and Engineering, University of Arkansas, Fayetteville, AR 72701, USA
Tamzeed B. Amin: Department of Physics, University of Arkansas, Fayetteville, AR 72701, USA
James M. Mangum: Department of Physics, University of Arkansas, Fayetteville, AR 72701, USA
Ashaduzzaman: Materials Science and Engineering, University of Arkansas, Fayetteville, AR 72701, USA
Paul M. Thibado: Department of Physics, University of Arkansas, Fayetteville, AR 72701, USA

Energies, 2024, vol. 17, issue 23, 1-9

Abstract: High electrical conductivity and optical transparency make graphene a suitable candidate for photovoltaic-based power systems. In this study, we present the design and fabrication of an array of graphene-based Schottky junction solar cells. Using mainstream semiconductor manufacturing methods, we produced 96 solar cells from a single 100 mm diameter silicon wafer that was precoated with an oxide layer. The fabrication process involves removing the oxide layer over a select region, depositing metal contacts on both the oxide and bare silicon regions, and transferring large-area graphene onto the exposed silicon to create the photovoltaic interface. A single solar cell can provide up to 160 μA of short-circuit current and up to 0.42 V of open-circuit voltage. A series of solar cells are wired to recharge a 3 V battery intermittently, while the battery continuously powers a device. The solar cells and rechargeable battery together form a power system for any 3-volt low-power application.

Keywords: graphene; photolithography; wet etching; metalization; graphene transfer; Schottky junction; battery; low power (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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