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ISSN : 1225-0562(Print)
ISSN : 2287-7258(Online)
Korean Journal of Materials Research Vol.28 No.10 pp.564-569

The Effects of Sodium Doping on the Electrical Properties of the Cu2ZnSn(S,Se)4 (CZTSSe) Solar Cells

Hongjae Shim1, Jihun Kim1, MyungGil Gang1, Jinhyeok Kim1†
1Department of Materials Science and Engineering, Chonnam National University 300 Yongbong-Dong, Puk-Gu, Gwangju 500-757, Republic of Korea
Corresponding author
E-Mail : H. Kim, Chonnam Nat'l Univ.)


Cu2ZnSn(S,Se)4 (CZTSSe) films were prepared on Mo coated soda lime glass substrates by sulfo-selenization of sputtered stacked Zn-Sn-Cu(CZT) precursor films. The precursor was dried in a capped state with aqueous NaOH solution. The CZT precursor films were sulfo-selenized in the S + Se vapor atmosphere. Sodium was doped during the sulfo-selenization treatment. The effect of sodium doping on the structural and electrical properties of the CZTSSe thin films were studied using FE-SEM(field-emission scanning electron microscopy), XRD(X-ray diffraction), XRF(X-ray fluorescence spectroscopy), dark current, SIMS(secondary ion mass spectrometry), conversion efficiency. The XRD, XRF, FE-SEM, Dark current, SIMS and cell efficiency results indicated that the properties of sulfo-selenized CZTSSe thin films were strongly related to the sodium doping. Further detailed analysis and discussion for effect of sodium doping on the properties CZTSSe thin films will be discussed.

용액법을 이용한 나트륨 도핑에 따른 Cu2ZnSnSe4 (CZTSSe) 박막의 합성 및 특성 평가

심홍재1, 김지훈1, 강명길1, 김진혁1†
1신소재공학과, 광전자융합기술연구소, 전남대학교