화학공학소재연구정보센터
Solar Energy Materials and Solar Cells, Vol.134, 395-399, 2015
Nanostructured silicon p-layer obtained by radio frequency power profiling process for high-efficiency amorphous silicon solar cell
A RF power profiling process has been developed to efficiently grow nanostructured silicon (nc-Si:H) players for high-efficiency amorphous silicon solar cells. The p-layer deposition starts at a relatively low power in the initial stage, which is then continuously and rapidly increased to a high level until the bulk p-layer deposition is finished. Incorporating the p-layer into a-Si:H solar cell resulted in high V-oc and high FF simultaneously, which can be ascribed to the reduced recombination at the i/p interface caused by the suitable band-gap of p-layer, low ion damage to i/p interface, and appropriate band-gap matching between p- and i-layers during the RF power profiling process. An initial efficiency of 10.8% for an a-Si:H solar cell with both high V-oc of 0.99 V and high FF of 0.72 was obtained. This power profiling scheme is potentially advantageous since it is easier to integrate into continuous process. (C) 2014 Elsevier B.V. All rights reserved.