Abstract
Recently, i
ncorporation of band gap graded structure into Cd Te absorption layer has been proposed for Cd Te based solar
cells. In the present work, we numerically investigate t he effects of band gap gradation on photovoltaic characteristics for
CdS/Cd ZnTe band gap back graded solar cells Dependences of short circuit current density, open circuit voltage, and
conversion efficiency on the grading strength are obtained and analyze d . Moreover, impact s of minority carrier diffusion
length of band gap graded Cd ZnTe layer on the grading benefits for CdS/Cd ZnTe back graded solar cells are discussed in
detail.
Keywords
CdS/Cd ZnTe thin film solar cell Graded band gap SCAPS Photovoltaic characteristics Minority carrier diffusion length.
Citation
YINGHUI SUN, PINGXIONG YANG, YE CHEN, LIYAN SHANG, JUNHAO CHU, N umerical evaluation of grading benefits in Cd S/CdZnTe band gap back graded solar cells, Optoelectronics and Advanced Materials - Rapid Communications, 6, 1-2, January-February 2012, pp.280-283 (2012).
Submitted at: Nov. 12, 2011
Accepted at: Feb. 20, 2012