Amorphous Silicon Solar cells with a Core-Shell Nanograting Structure

TL;DR

This paper explores a novel amorphous silicon solar cell design with a core-shell nanograting that enhances light absorption and current generation through plasmonic and wave effects, promising improved photovoltaic performance.

Contribution

It introduces a new core-shell nanograting structure for amorphous silicon solar cells, demonstrating significant optical and electrical improvements over traditional designs.

Findings

Enhanced absorption due to Bloch waves and SPP waves

Ultrabroadband, omnidirectional, polarization-insensitive response

Potential for high-efficiency photovoltaic applications

Abstract

We systematically investigate the optical behaviors of an amorphous silicon solar cell based on a core-shell nanograting structure. The horizontally propagating Bloch waves and Surface Plasmon Polariton (SPP) waves lead to significant absorption enhancements and consequently short-circuit current enhancements of this structure, compared with the conventional planar one. The perpendicular carrier collection makes this structure optically thick and electronically thin. An optimal design is achieved through full-field numerical simulation, and physical explanation is given. Our numerical results show that this configuration has ultrabroadband, omnidirectional and polarization-insensitive responses, and has a great potential in photovoltaics.