title: Transparent conductor-embedding nanocones for selective emitters: optical and electrical improvements of Si solar cells.
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.
authors: Department of Electrical Engineering, Incheon National University, Incheon 406772, Korea.
authors: Joondong
authors: J
authors: Kim
authors: Department of Electrical Engineering, Incheon National University, Incheon 406772, Korea.
authors: Ju-Hyung
authors: JH
authors: Yun
authors: College of Information and Communication Engineering, Sungkyunkwan University, Suwon 440746, Korea.
authors: Hyunyub
authors: H
authors: Kim
authors: Department of Physics, Ewha Womans University, Seoul 120750, Korea.
authors: Yunae
authors: Y
authors: Cho
authors: Applied Device and Material Lab., Device Technology Division, Korea Advanced Nanofab Center (KANC), Suwon 443270, Korea.
authors: Hyeong-Ho
authors: HH
authors: Park
authors: Department of Electrical Engineering, Incheon National University, Incheon 406772, Korea.
authors: M Melvin David
authors: MM
authors: Kumar
authors: College of Information and Communication Engineering, Sungkyunkwan University, Suwon 440746, Korea.
authors: Junsin
authors: J
authors: Yi
authors: Department of Electrical Engineering, University at Buffalo, State University of New York, Buffalo, New York 14260, USA.
authors: Wayne A
authors: WA
authors: Anderson
authors: Department of Physics, Ewha Womans University, Seoul 120750, Korea.
authors: Dong-Wook
authors: DW
authors: Kim