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Efficient light-trapping in ultrathin GaAs solar cells using quasi-random photonic crystals
- Publication Year :
- 2022
-
Abstract
- Ultrathin solar cells reduce material usage and allow the use of lower-quality materials thanks to their one order of magnitude smaller thickness than their conventional counterparts. However, efficient photonic light-trapping is required to harvest the incident light efficiently for an otherwise insufficient absorber thickness. Quasi-random photonic crystals are predicted to have high efficient light-trapping while being more robust under angle and thickness variations than simple photonic crystals. Here we experimentally demonstrate a light-trapping solution based on quasi-random photonic crystals fabricated by polymer blend lithography. We control the average lattice parameter by modifying the spin-coating speed. We demonstrate an ultrathin GaAs cell of 260 nm with a rear quasi-random pattern with submicron features, and a Jsc =26.4 mA/cm2 and an efficiency of 22.35% under the global solar spectrum.
- Subjects :
- Physics - Applied Physics
Physics - Optics
Subjects
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.2202.03106
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1016/j.nanoen.2022.107080