Light absorption in solar cell.

[nafisahmed29]

Hi,

I am designing an amorphous silicon solar cell and i wanted some pointers on how I should calculate the width of the intrinsic layer to get maximum absorption of light into my cell.

I have designed my cell with the doping concentrations of p and n layer as 10^18 and 10^15 respectively.

 

[AMOHAMMEDZ]

good job
i'm sorry, i can't help you about Si solar cell.
i'm now working on the third generation of solar cell "DSSC ".
i want to know more about sputtering technique for deposition process,how can we remove plasma after sputtering?

 

[astrokreng]

Thank you for reaching out about your amorphous silicon solar cell design. The width of the intrinsic layer is an important factor in determining the efficiency of light absorption in your cell. To calculate the optimal width, you will need to consider the energy bandgap of amorphous silicon and the wavelengths of light that you want to capture.

The energy bandgap of amorphous silicon is approximately 1.7 electron volts (eV), which corresponds to a wavelength of about 725 nanometers (nm). This means that your cell will be most efficient at absorbing light with a wavelength of 725 nm or shorter. You can use this information to calculate the optimal width of your intrinsic layer by considering the absorption coefficient of amorphous silicon at different wavelengths.

In general, a thicker intrinsic layer will result in better light absorption, but it is important to find a balance between absorption and carrier collection efficiency. A thicker layer may also increase the chances of recombination of charge carriers, reducing the overall efficiency of your cell.

Additionally, the doping concentrations of your p and n layers will also affect the absorption of light in your cell. Higher doping concentrations can lead to a decrease in the absorption coefficient, so it is important to carefully consider the trade-off between doping concentration and carrier collection efficiency.

I recommend using simulation software or conducting experiments to optimize the width of your intrinsic layer and the doping concentrations of your p and n layers for maximum light absorption in your solar cell. Good luck with your research!