Theoretical current density of solar cells

Why are current density–voltage characteristics important in solar cell research?

It therefore serves as an optimal starting point to analyse performance losses of solar cells. Current density–voltage characteristics (J–V s) are widely acknowledged as the cornerstone measurement in solar cell (SC) research since they allow for the quantification of a SC's power conversion efficiency (PCE).

What is the theory of solar cells?

The theory of solar cells explains the process by which light energy in photons is converted into electric current when the photons strike a suitable semiconductor device.

What is the temperature dependence of the performance parameters of solar cells?

This paper investigates the temperature dependence of the performance parameters of solar cells based on the following semiconductor materials: Ge, Si, GaAs, InP, CdTe and CdS in the temperature range 273–523 K.

How does temperature affect the spectral intensity of a solar cell?

Generally, for most semiconductors, as the temperature increases, the bandgap decreases . Consequently, the solar cell responds to longer wavelength regions in the solar spectrum and Jsc increases. Thus, Jsc is roughly proportional to the incident spectral intensity at wavelengths near the band edge .

How does temperature affect solar cell efficiency?

With increasing temperature, reverse satura-tion current increases, and therefore, Voc decreases which decreases the fill factor and hence the efficiency of the solar cell. At the same time, the bandgap also decreases with increasing temperature and this results in an increase in Jsc which acts to improve the efficiency of the cell.

Why is optimum wire density important for solar cell performance?

An optimum density of wire network is essential for the maximum solar cell performance as higher wire density blocks the light transmittance while lower wire density leads to high recombination losses due to more distance traveled by the charge carriers.