27.09%-efficiency silicon heterojunction back contact solar cell and going beyond.

ABSTRACT: Crystalline-silicon heterojunction back contact solar cells represent the forefront of photovoltaic technology, but encounter significant challenges in managing charge carrier recombination and transport to achieve high efficiency. In this study, we produced highly efficient heterojunction back contact solar cells with a certified efficiency of 27.09% using a laser patterning technique. Our findings indicate that recombination losses primarily arise from the hole-selective contact region and polarity boundaries. We propose solutions to these issues and establish a clear relationship between contact resistivity, series resistance, and the design of the rear-side pattern. Furthermore, we demonstrate that the wafer edge becomes the main channel for current density loss caused by carrier recom

SUBMITTER: Wang G 

PROVIDER: S-EPMC11484749 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature