Transparent conductor-embedding nanocones for selective emitters: optical and electrical improvements of Si solar cells

Scientific Reports
Joondong KimDong-Wook Kim

Abstract

Periodical nanocone-arrays were employed in an emitter region for high efficient Si solar cells. Conventional wet-etching process was performed to form the nanocone-arrays for a large area, which spontaneously provides the graded doping features for a selective emitter. This enables to lower the electrical contact resistance and enhances the carrier collection due to the high electric field distribution through a nanocone. Optically, the convex-shaped nanocones efficiently reduce light-reflection and the incident light is effectively focused into Si via nanocone structure, resulting in an extremely improved the carrier collection performances. This nanocone-arrayed selective emitter simultaneously satisfies optical and electrical improvement. We report the record high efficiency of 16.3% for the periodically nanoscale patterned emitter Si solar cell.

References

May 8, 2010·Nano Letters·Wei WangShaochen Chen
Sep 30, 2010·Proceedings of the National Academy of Sciences of the United States of America·Zongfu YuShanhui Fan
Nov 16, 2011·ACS Nano·Vivian E FerryHarry A Atwater
Mar 2, 2012·ACS Nano·Corsin BattagliaChristophe Ballif
Nov 23, 2012·Nano Letters·Majid GharghiXiang Zhang
Mar 27, 2013·Scientific Reports·M M AdachiK S Karim
May 15, 2013·ACS Nano·Kwanyong SeoKenneth B Crozier
Nov 26, 2013·Journal of Nanoscience and Nanotechnology·Heeseok KimJunsin Yi
Jan 7, 2014·Nature Nanotechnology·Francesco PrioloThomas F Krauss
Nov 6, 2014·Scientific Reports·Ju-Hyung YunJingbo Sun

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