Detailed Balance Calculation of a Novel Triple-Junction Solar Cell Structure
- Detailed Balance Calculation of a Novel Triple-Junction Solar Cell Structure
- 김성일; 김영환; 안영근
- solar cell; triple-junction; detailed balance calculation; Energy efficiency; hybrid junctions; photovoltaic (PV) cells
- Issue Date
- IEEE Journal of Photovoltaics
- VOL 3, NO 4, 1403-1408
- In this paper, a novel triple-junction solar cell structure
is investigated using a numerical simulation based on the
detailed balance calculation. The topmost subcell is electrically
connected in parallel to other two subcells, while the latter are
connected in series in the new triple-junction solar cell structure.
The theoretical limiting efficiencies under AM1.5G, AM1.5D, and
AM0 illumination conditions are calculated to be 50.5%, 49.8%,
and 46.6%, respectively, at 300 K. This study shows that the top
subcell’s bandgap for this new structure possesses a wide optimum
energy range. It presents diverse electrical behaviors and different
optimum bandgap combinations from those of an in-series connected
triple-junction solar cell. Here, we present its schematic
structure, as well as the optimum bandgap combinations and current
density–voltage characteristics. The results suggest that the
new triple-junction solar cell structure is feasible and competitive
as it shows a wide optimum bandgap energy range for the top
subcell with high limiting efficiency of the solar cell.
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