Gallium phosphide-titanium solar cell shows potential for 60% energy conversion efficiency
By
Ameya Paleja
Crusty in the right places. Worth the chew.
Summary
Researchers have developed a solar cell using gallium phosphide (GaP) and titanium (Ti) that could theoretically achieve 60% energy conversion efficiency, far surpassing the 33% Shockley-Queisser limit of conventional silicon solar cells. The team built a 1 cm² solar cell with a GaP:Ti absorber layer only 50 nm thick, using gold and germanium contacts. Through transmittance and reflectance measurements, they demonstrated the potential for this novel material combination to dramatically improve solar energy conversion.
Key quotes
· 3 pulledReaching 60 percent efficiency
The team built a one cm2-sized solar cell with a Gap: Ti absorber no thicker than 50 nm and metal contacts using gold and germanium.
Since the SQ limit is dependent on the bandgap of the semiconductor material, Ariza and his team chose Gap, which has a bandgap of 2.26 eV.
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