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

Joondong Kim, Ju Hyung Yun, Hyunyub Kim, Yunae Cho, Hyeong Ho Park, M. Melvin David Kumar, Junsin Yi, Wayne A. Anderson, Dong Wook Kim

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

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.

Original languageEnglish
Article number9256
JournalScientific Reports
Volume5
DOIs
StatePublished - 19 Mar 2015

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