Journal
IEEE JOURNAL OF PHOTOVOLTAICS
Volume 13, Issue 2, Pages 260-266Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPHOTOV.2023.3239745
Keywords
Energy efficiency; silicon devices; solar energy
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An exact analytical expression for the probability of photon reabsorption and recycling in a solar cell is derived. The existing approximations are found to agree with the exact formula within 5%. The most accurate approximation sets the reabsorption probability to the weak-absorption limit of the cell absorptance. The maximal photoconversion efficiency of a silicon solar cell is evaluated to be 29.5% with a base thickness of 98 μm.
An exact analytical expression for the probability of photon reabsorption and recycling in an idealized solar cell with two Lambertian surfaces is derived. The existing approximations are found to agree with the exact formula to within 5%. The most accurate approximation turned out to be the simplest one that sets the reabsorption probability to the weak-absorption limit of the cell absorptance. The maximal photoconversion efficiency of a silicon solar cell is evaluated to be 29.5% at the base thickness of 98 mu m.
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