Hybrid Si microwire and planar solar cells: passivation and characterization.

Kim, Dong Rip; Lee, Chi Hwan; Rao, Pratap Mahesh; Cho, In Sun; Zheng, Xiaolin · Nano Lett · 2011

basic_science · Level V

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Abstract

We report an efficient hybrid Si microwire (radial junction) and planar solar cell with a maximum efficiency of 11.0% under AM 1.5G illumination. The maximum efficiency of the hybrid cell is improved from 7.2% to 11.0% by passivating the top surface and p-n junction with thin a-SiN:H and intrinsic poly-Si films, respectively, and is higher than that of planar cells of the identical layers due to increased light absorption and improved charge-carrier collections in both wires and planar components.

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