Optoelectronic Optimization of Thin-Film Solar Cells

DIPC Seminars

Akhlesh Lakhtakia, Pennsylvania State University, USA
Donostia International Physics Center
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Optoelectronic Optimization of Thin-Film Solar Cells Solar light received on earth is rich in photons in the 500-900-nm wavelength range. A photovoltaic solar cell is an optoelectronic device containing semiconductors that capture and absorb solar photons. Every absorbed photon creates an electron-hole pair (EHP). Electrons and holes are sent in opposite directions to generate an electric current. However, some electrons can recombine with holes to reduce the current. Reliable and accurate simulation tools are required to design and optimize thin-film solar cells to enhance photon absorption, maximize the EHP generation rate, and minimize the EHP recombination rate. With the rigorous coupled-wave approach used for the optical model and the finite-element method for the electrical model of the solar cell, and the differential evolution algorithm for optimal grading of the bandgap of the absorber layer, the efficiencies of thin-film solar cells can be enhanced 25% and higher. **Host:** Juan Jose Saenz