Numerical simulation of innovative device structures for silicon thin-film solar cells
- 1 January 1996
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- No. 01608371,p. 469-472
- https://doi.org/10.1109/pvsc.1996.564045
Abstract
We investigate the optical and electronic properties of thin-film silicon solar cells by means of numerical simulations. The optical design under investigation is the encapsulated-V texture which is capable of absorbing sunlight corresponding to a maximum short circuit current density of 35 mA/cm/sup 2/. Since the layer thickness can be restricted to only 4 /spl mu/m, the encapsulated-V structure provides also a good collection efficiency for photogenerated charge carriers. Practical efficiencies around 12% can be expected for Si material with a minority carrier lifetime as low as 10 ns. Increased lifetimes of 100 ns allow for about 14% efficiency. The benefit of multiple junctions strongly depends on surface recombination. The efficiency of a single junction cell can be improved from 10% to 13% by a three junction device if the surface recombination velocity is as high as 10/sup 5/ cm/s. For moderate surface recombination the gain is only 1%.Keywords
This publication has 3 references indexed in Scilit:
- Rapid thermal oxidation of silicon in N2O between 800 and 1200 °C: Incorporated nitrogen and interfacial roughnessApplied Physics Letters, 1994
- Silicon solar cells: The ultimate photovoltaic solution?Progress In Photovoltaics, 1994
- Numerical modeling of textured silicon solar cells using PC-1DIEEE Transactions on Electron Devices, 1990