Design and Analysis of Thin Film Based Silicon Solar Cells for Efficient Light Trapping
Silicon based solar cells are still preferable due to its existing technology with inexpensive fabrication cost. However, silicon solar cells are having drawback of weak absorption in longer wavelength due its indirect band gap and needs efficient light trapping in active region. In this paper, we present a design of solar cells based on top anti-reflection coating (ARC) layer and back reflector which is composed of distributed Bragg reflector (DBR) and diffraction grating (GRA) using finite difference time domain (FDTD) method. Simulations show efficient trapping of photon in active region as comparison to reference solar cell. A relative enhancement of cell efficiency ~54 and 60 % is observed for designed solar cells C2 and C3 respectively. This enhancement in performance of solar cells is attributed to the increased absorption and quantum efficiency in red and infrared part of incident solar spectrum.
KeywordsSolar Cell Silicon Solar Cell Perfectly Match Layer Light Trapping Finite Difference Time Domain
The financial support provided by Defence Research and Development Organisation (DRDO), New Delhi, INDIA is highly acknowledged.
- 3.Krc J, Zeman M, Luxembourg SL, Topic M (2009) Modulated photonic-crystal structures as broad band back reflectors in thin film solar cells. Appl Phys Lett 94(15):153501-1–153501-3Google Scholar
- 4.Sheng X, Johnson SG, Broderick LZ, Michel J, Kimerling LC (2012) Integrated photonic structures for light trapping in thin film Si solar cells. Appl Phys Lett 100:111110-1–111110-3Google Scholar
- 5.Zeng L, Yi Y, Hong C, Liu J, Feng N, Duan X, Kimerling LC (2006) Efficiency enhancement in Si solar cells by textured photonic crystal back reflector. Appl Phys Lett 89:111111-1–111111-3Google Scholar