Investigation of sodium distribution in CuZnSnS thin films and its effects on the performance of the solar cells

TY - JOUR

T1 - Investigation of sodium distribution in CuZnSnS thin films and its effects on the performance of the solar cells

AU - Yuan, Lin

AU - Han, Junfeng

AU - Jian, Yu

AU - Ge, Jun

AU - Peng, Xianglin

AU - Xiong, Xiaolu

AU - Dong, Xu

AU - Liao, Cheng

AU - Cha, Limei

AU - Krishnakumar, V.

N1 - Publisher Copyright: © 2016 Elsevier Ltd

PY - 2016/12/1

Y1 - 2016/12/1

N2 - In this work, we have studied the influence of sodium in CuZnSnS (CZTS) solar cells. The CZTS films were prepared on soda lime glass substrates with and without sodium barrier layers (the glass substrate served as a sodium source). Alternatively, a 40 nm NaF layer was deposited on the metallic precursor using glass substrates with a sodium barrier layer. The SEM showed a bi-layer structure of CZTS films. The bottom layer with small grains became thicker with sodium doping. Using the UV-Raman spectroscopy, ZnS phase was observed both in the surface and interface for the sample prepared with NaF. XPS indicated that sodium was rich on the film surface and at the CZTS/Mo interface. Simultaneously the surface and interface identified to be low concentrations of Cu as well as high concentrations of Zn. The I–V curve under light indicated that the performance could be improved by controlling the amount sodium.

AB - In this work, we have studied the influence of sodium in CuZnSnS (CZTS) solar cells. The CZTS films were prepared on soda lime glass substrates with and without sodium barrier layers (the glass substrate served as a sodium source). Alternatively, a 40 nm NaF layer was deposited on the metallic precursor using glass substrates with a sodium barrier layer. The SEM showed a bi-layer structure of CZTS films. The bottom layer with small grains became thicker with sodium doping. Using the UV-Raman spectroscopy, ZnS phase was observed both in the surface and interface for the sample prepared with NaF. XPS indicated that sodium was rich on the film surface and at the CZTS/Mo interface. Simultaneously the surface and interface identified to be low concentrations of Cu as well as high concentrations of Zn. The I–V curve under light indicated that the performance could be improved by controlling the amount sodium.

KW - A. Thin films

KW - B. Sputtering

KW - C. Photoelectron spectroscopy

KW - C. Raman spectroscopy

KW - D. Semiconductivity

UR - http://www.scopus.com/inward/record.url?scp=84982170245&partnerID=8YFLogxK

U2 - 10.1016/j.materresbull.2016.08.003

DO - 10.1016/j.materresbull.2016.08.003

M3 - 文章

AN - SCOPUS:84982170245

SN - 0025-5408

VL - 84

SP - 314

EP - 322

JO - Materials Research Bulletin

JF - Materials Research Bulletin

ER -