Design and optimization of ultrathin crystalline silicon solar cells using an efficient back reflector
S. Saravanan,
R. S. Dubey,
S. Kalainathan,
M. A. More,
D. K. Gautam
Affiliations
S. Saravanan
Advanced Research Laboratory for Nanomaterials and Devices, Department of Nanotechnology, Swarnandhra College of Engineering and Technology, Seetharampuram, Narsapur (A.P.), Pin-534280, India
R. S. Dubey
Advanced Research Laboratory for Nanomaterials and Devices, Department of Nanotechnology, Swarnandhra College of Engineering and Technology, Seetharampuram, Narsapur (A.P.), Pin-534280, India
S. Kalainathan
School of Advanced Sciences, VIT University, Vellore, (T.N.), Pin-632014, India
M. A. More
Center for Advanced Studies in Materials Science and Condensed Matter Physics, Department of Physics, University of Pune, (M.S.), Pin-411007, India
D. K. Gautam
Department of Electronics, North Maharashtra University, Post Box 80, Umavinagar, Jalgaon (M.S.), Pin-425001, India
Thin film solar cells are cheaper but having low absorption in longer wavelength and hence, an effective light trapping mechanism is essential. In this work, we proposed an ultrathin crystalline silicon solar cell which showed extraordinary performance due to enhanced light absorption in visible and infrared part of solar spectrum. Various designing parameters such as number of distributed Bragg reflector (DBR) pairs, anti-reflection layer thickness, grating thickness, active layer thickness, grating duty cycle and period were optimized for the optimal performance of solar cell. An ultrathin silicon solar cell with 40 nm active layer could produce an enhancement in cell efficiency ∼15 % and current density ∼23 mA/cm2. This design approach would be useful for the realization of new generation of solar cells with reduced active layer thickness.
