Effects of optical beam size on diffusion length measured by the surface photo-voltage method

Surface photovoltage phenomena: theory, experiment, and applications

“…Naturally, this assumption has to be examined with particular caution in scanning applications. Sopori et al [537] noted relatively early on that the spot size must be large enough to avoid lateral diffusion effects. They predicted that lateral diffusion would be negligible and the true value of L obtained only if the spot size is at least 30 times as wide as L. In view of the results of, e.g., Lile [427] and Lagowski et al [12,529], this quantitative criterion seems to be much too harsh.…”

Physical understanding and technological control of carrier lifetimes in semiconductor materials and devices: A critique of conceptual development, state of the art and applications

“…11b) [68][69][70][71][72][73][74][75][76]. Its attractive features include its nondestructive and contactless measurement approach.…”

Simulation Results: Optimization of Contact Ratio for Interdigitated Back-Contact Solar Cells

“…The bulk defects and traps [52,53] are also responsible for recombination in solar cells. The bulk defects influence the diffusion length [54], which reduces the light-induced current in solar cells especially of IBC structure.…”