Kim, Inho Jeong, Doo Seok Lee, Wook Seong Kim, Won Mok Lee, Kyeong-Seok Lee, Taek-Sung 2024-01-20T04:30:47Z 2024-01-20T04:30:47Z 2021-09-04 2016-05 1567-1739 https://pubs.kist.re.kr/handle/201004/124127 Texturing of silicon wafers with periodic gratings in submicron scale is one of effective light trapping routes especially for thin crystalline silicon solar cells. The grating can be very effective for trapping of photons near band gap of crystalline silicon when its period is suitably chosen. The asymmetric gratings provide higher light trapping efficiency than symmetric ones because the asymmetric one suppress the escape of internally reflected light in the silicon wafers. In this study, we conceptually show that asymmetric grating can be fabricated by simple stacking of a dielectric layer onto the symmetric silicon grating structures. Optical simulations were performed to calculate optical absorptions in thin crystalline silicon of a 5 mu m thickness with symmetric and asymmetric grating structures. We demonstrate that with the asymmetric grating structures combined with highly efficient antireflection coating, optical absorptions in the thin silicon wafers can reach over 97% of the Lambertian absorption limit. (C) 2016 Elsevier B.V. All rights reserved. English ELSEVIER PHOTON MANAGEMENT FUNDAMENTAL LIMIT LIGHT ANTIREFLECTION EFFICIENCY Asymmetric back contact nanograting design for thin c-Si solar cells Article 10.1016/j.cap.2016.02.007 1 CURRENT APPLIED PHYSICS, v.16, no.5, pp.568 - 573 CURRENT APPLIED PHYSICS 16 5 568 573 scie scopus kci ART002110052 000373088200012 2-s2.0-84960914811 Materials Science, Multidisciplinary Physics, Applied Materials Science Physics Article PHOTON MANAGEMENT FUNDAMENTAL LIMIT LIGHT ANTIREFLECTION EFFICIENCY Thin crystalline silicon solar cells Light trapping Texturing Grating Optical modeling