Minority carrier decay length extraction from scanning photocurrent profiles in two-dimensional carrier transport structures.

ABSTRACT: Carrier transport was studied both numerically and experimentally using scanning photocurrent microscopy (SPCM) in two-dimensional (2D) transport structures, where the structure size in the third dimension is much smaller than the diffusion length and electrodes cover the whole terminal on both sides. Originally, one would expect that with increasing width in 2D transport structures, scanning photocurrent profiles will gradually deviate from those of the ideal one-dimensional (1D) transport structure. However, the scanning photocurrent simulation results surprisingly showed almost identical profiles from structures with different widths. In order to clarify this phenomenon, we observed the spatial distribution of carriers. The simulation results indicate that the integrated carrier distrib

SUBMITTER: Wei YC 

PROVIDER: S-EPMC8575939 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature