EFFECT OF THE GRAIN SIZES ON THE PHOTOVOLTAIC PARAMETERS OF CDTE SOLAR CELLS PREPARED BY CLOSE SPACE SUBLIMATION METHOD

Tamara POTLOG Moldova State University, Physics Department

Аннотация

Thin Film CdS/CdTe solar cells were fabricated by Close Space Sublimation at the substrate temperature ranging
from 300 ºC± 5ºC to 340 ± 5ºC ºC. The best photovoltaic parameters were achieved at substrate temperature 320oC and
source temperature 610oC. The open circuit voltage and current density changes significantly with the substrate temperature
and depends on the dimension of the grain sizes. Grain size is an efficiency limiting parameter for CdTe layers
with large grains. The open circuit voltage and current density are the best for the cells having dimension of grains between
1.0 μm and ~5.0 μm. CdS/CdTe solar cells with an efficiency of~10% were obtained.