Three-terminal solar cell circuit

Details Three-terminal solar cell circuit Three-terminal solar cell circuit

1984-04-19

1985-04-23

Weisstuch, Aaron

Batteries: thermoelectric and photoelectric

Photoelectric

Panel or array

136249, H01L 3106

Patent

active

045131686

ABSTRACT:
Photovoltaic solar cells have improved efficiency when constructed in monolithic form with two different band gap energy junctions. Solar light goes first through an upper layer containing a high band gap energy junction which absorbs the short-wavelength components of light. Then the remaining long-wavelength components are absorbed in a second active layer containing a low band gap energy junction. The cell may comprise p-n-n-p type layers.
According to the invention, each low band-gap, low-voltage junction is made to have 1/2 the voltage of the high band-gap high-voltage junctions. The junctions are then connected such that the high-voltage junctions are in parallel and the series connection of low-voltage junctions is also in parallel with them. The junction voltages are invariant so the parallel connection works for any light spectrum.

REFERENCES:
patent: 4387265 (1983-06-01), Dalal
patent: 4461922 (1984-07-01), Gay et al.
J. C. C. Fan et al., "Optimal Design of High-Efficiency Tandem Cells," Conf. Record, 16th IEEE Photovoltaic Specialists Conf. (1982), pp. 692-701.
L. M. Fraas et al., "Ternary III-V Solar Cells for Multicolor Applications", Conf. Record, 16th IEEE Photovoltaic Specialists Conf. (1982), pp. 655-662.

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