High-efficiency Ga1−xAlxAs–GaAs solar cells
- 15 October 1972
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 21 (8), 379-381
- https://doi.org/10.1063/1.1654421
Abstract
Heterojunction solar cells consisting of pGa1−xAlxAs–pGaAs–n GaAs are grown by liquid‐phase epitaxy and exhibit power conversion efficiencies of over 16% (corrected for contact area) measured in sunlight for air mass 1 at sea level, while efficiencies of 19–20% are obtained for an air mass value of 2 or more. The improved efficiencies compared to conventional homojunction (Si and GaAs) cells are attributed to the reduction of series resistance and the reduction of surface recombination losses resulting from the presence of the heavily doped Ga1−xAlxAs layer. Open‐circuit voltages of 0.98–1.0 V and short‐circuit currents of 18–21 mA/cm2 (corrected for contact area) are observed for a solar input intensity of 98.3 mW/cm2.Keywords
This publication has 5 references indexed in Scilit:
- Solution grown Ga1−xAlxAs superlattice structuresJournal of Crystal Growth, 1972
- A Modified Fourier Transform Method for Multiple Scattering Calculations in a Plane Parallel Mie AtmosphereApplied Optics, 1970
- Characteristics of High-Conversion-Efficiency Gallium-Arsenide Solar CellsIRE Transactions on Military Electronics, 1962
- Limitations and Possibilities for Improvement of Photovoltaic Solar Energy Converters: Part I: Considerations for Earth's Surface OperationProceedings of the IRE, 1960
- Proposed standard solar-radiation curves for engineering useJournal of the Franklin Institute, 1940