Enhanced quantum efficiency of amorphous silicon thin film solar cells with the inclusion of a rear-reflector thin film

Abstract

We investigated the growth mechanism of amorphous silicon thin films by implementing hot-wire chemical vapor deposition and fabricated thin film solar cell devices. The fabricated cells showed efficiencies of 7.5 and 8.6% for the samples without and with the rear-reflector decomposed by sputtering, respectively. The rear-reflector enhances the quantum efficiency in the infrared spectral region from 550 to 750 nm. The more stable quantum efficiency of the sample with the inclusion of a rear-reflector than the sample without the rear-reflector due to the bias effect is related to the enhancement of the short circuit current.

Nanoporous Anodic Edge Passivation of Si Solar Cells

“…This mirror behavior of AAO is related to the possibility of further boost scattering or plasmonic enhancement. 23 sample shows that the PL image (a1) is uniformly bright indicating a good p-n junction, but the EL image (a2) is not uniform. The EL emission was less intense in the center portion of the cell compared to its sides.…”