Two dimensional simulations were performed to asses the potential for screen printed interdigitated back contact solar cells. In this work we optimized the design of the rear back surface field and emitter for screen printed contacts in conjunction with the design of the front surface field for best performance. With these optimized diffusion profiles we then explored the best cell design by varying the pitch, the gap between the n+ and p+ regions and the base resistivity. Model calculations provide guidelines for designing screen printed IBC solar cells given certain limitations on base resistivity or ability to create a small gap between the n+ and p+ diffusion. In these simulations care was taken to assign realistic parameters to cell design, wafer quality, and cell dimensions that are achievable for screen printing technology. Through these simulations we show the potential for a 22% efficient solar cell with screen printed contacts. Higher emitter fraction, smaller gap, and opaque diffused regions play an important role in attaining high efficiency screen printed interdigitated back contact solar cells.
[1]
F. Granek,et al.
Analysis of Local Boron Dopings Formed with LCP
,
2010
.
[2]
David D. Smith,et al.
Generation 3: Improved performance at lower cost
,
2010,
2010 35th IEEE Photovoltaic Specialists Conference.
[3]
Jürgen Schumacher,et al.
Numerical modeling of highly doped Si:P emitters based on Fermi–Dirac statistics and self-consistent material parameters
,
2002
.
[4]
H. Antoniadis,et al.
All screen printed mass produced Silicon Ink selective emitter solar cells
,
2010,
2010 35th IEEE Photovoltaic Specialists Conference.
[5]
A. Rohatgi,et al.
2D-Modeling and Development of Interdigitated Back Contact Solar Cells on Low-Cost Substrates
,
2006,
2006 IEEE 4th World Conference on Photovoltaic Energy Conference.
[6]
W. Warta,et al.
Analysis of one-sun monocrystalline rear-contacted silicon solar cells with efficiencies of 22.1%
,
2002
.