TY - JOUR
T1 - Exploring New Cadmium Salts to Enhance the Photovoltaic Conversion Efficiency of Cu2ZnSn(S,Se)4 Solar Cells
AU - Gao, Haixuan
AU - Ma, Chuanhe
AU - Zhang, Jinhui
AU - Jiang, Jinchun
AU - Chen, Ye
AU - Sun, Lin
AU - Wang, Hailong
N1 - Publisher Copyright:
© 2024 American Chemical Society
PY - 2024/2/15
Y1 - 2024/2/15
N2 - In the prior art of CZTSSe solar cells, the traditional cadmium salt (Cd-salt) CdSO4 is widely considered as a common raw material for preparing CdS buffer layers. However, in this study, we systematically demonstrated the phase structure and transmission spectra improvement effect of the other three types of Cd-salts, Cd(NO3)2, CdCl2, and CdAc2, on the CZTSSe/CdS heterojunction (HJT) compared to CdSO4. CZTSSe/CdS HJT prepared by Cd(NO3)2 showed the strongest CdS phonon characteristic peaks at 295.9 and 597.6 cm-1, indicating a pure crystal phase. The transmittance of CdS films prepared by Cd(NO3)2 is 20-35% higher than the other three Cd-salts in the light range of 350-1000 nm, which effectively improved the band gap of the films (2.41 eV) and depressed the photon absorption and scattering. Accordingly, CZTSSe solar cells based on the aforementioned Cd-salts showed that Cd(NO3)2 possessed the best ability to improve the photovoltaic conversion efficiency (PCE), about 5.7% more than the traditional CdSO4 salt. After Sn2+ replaced by Sn4+ in the precursor solution, the PCE of CZTSSe solar cells using Cd(NO3)2 exceeded 10% (Total area = 0.21 cm2, PCE = 10.23%, VOC = 0.485 V, JSC = 31.4 mA/cm2, FF = 67.1%, without MgF2 antireflective layer).
AB - In the prior art of CZTSSe solar cells, the traditional cadmium salt (Cd-salt) CdSO4 is widely considered as a common raw material for preparing CdS buffer layers. However, in this study, we systematically demonstrated the phase structure and transmission spectra improvement effect of the other three types of Cd-salts, Cd(NO3)2, CdCl2, and CdAc2, on the CZTSSe/CdS heterojunction (HJT) compared to CdSO4. CZTSSe/CdS HJT prepared by Cd(NO3)2 showed the strongest CdS phonon characteristic peaks at 295.9 and 597.6 cm-1, indicating a pure crystal phase. The transmittance of CdS films prepared by Cd(NO3)2 is 20-35% higher than the other three Cd-salts in the light range of 350-1000 nm, which effectively improved the band gap of the films (2.41 eV) and depressed the photon absorption and scattering. Accordingly, CZTSSe solar cells based on the aforementioned Cd-salts showed that Cd(NO3)2 possessed the best ability to improve the photovoltaic conversion efficiency (PCE), about 5.7% more than the traditional CdSO4 salt. After Sn2+ replaced by Sn4+ in the precursor solution, the PCE of CZTSSe solar cells using Cd(NO3)2 exceeded 10% (Total area = 0.21 cm2, PCE = 10.23%, VOC = 0.485 V, JSC = 31.4 mA/cm2, FF = 67.1%, without MgF2 antireflective layer).
UR - https://www.scopus.com/pages/publications/85184829710
U2 - 10.1021/acs.energyfuels.3c04627
DO - 10.1021/acs.energyfuels.3c04627
M3 - 文章
AN - SCOPUS:85184829710
SN - 0887-0624
VL - 38
SP - 3428
EP - 3435
JO - Energy and Fuels
JF - Energy and Fuels
IS - 4
ER -
