Influence of defects on solar cell parameters - an experimental study
The influence of defects on solar cell parameters has been determined by fabricating and evaluating small area cells. Arrays of small area (50 mil diameter) solar cells were fabricated on polished polycrystalline silicon substrates. Their I-V characteristics (dark and illuminated), spectral responses and minority carrier diffusion lengths were measured. Selected diodes were laser scanned for photo-response variations. Diodes were defect etched to determine the densities of dislocations, stacking faults, twins, and other grain-boundaries. Dependences of cell parameters on type and density of defects have been evaluated. Application of the results of this analysis to predict large area cell parameters has been experimentally verified. 3 refs.
This paper discusses the factors which could affect the surface quality of zinc strip,such as technology,equipment,environment and operation in production process.Some suggestions to improve the surface quality of zinc strip were given.