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Progress on Silicon Microwire Solar Cells

Abstract

Silicon microwire is a very promising candidate for next-generation solar cells. Si microwires achieve strong broadband light absorption, acting as an antireflection coating layer. In addition to superior optical properties, Si microwires have potential for the effective separation and collection of photocarriers through the radial junction due to a short diffusion length to the microwire radius. This factor can relax the requirement for high-quality material, enabling a reduction in the cost of solar cells. In this report, we review recent progress in vertically aligned Si microwire solar cells with reference to: 1) optimized microwire structures to enhance light absorption, 2) uniform radial junction for effective carrier separation, 3) minimization of surface recombination through surface treatments, and 4) fine metal electrodes for efficient carrier collection. In addition, we present studies on flexible crystalline Si solar cells that use mechanically flexible Si microwires. Furthermore, based on the understanding of each fabrication process, we discuss the challenges related to the realization of high-efficiency Si microwire solar cells.

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Article information


Submitted
21 Nov 2019
Accepted
06 Feb 2020
First published
07 Feb 2020

J. Mater. Chem. A, 2020, Accepted Manuscript
Article type
Review Article

Progress on Silicon Microwire Solar Cells

H. Um, K. Lee, I. Hwang, J. Park, D. Choi, N. Kim, H. Kim and K. Seo, J. Mater. Chem. A, 2020, Accepted Manuscript , DOI: 10.1039/C9TA12792E

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