引用本文:
华缜, 靳正国, 武卫兵, 程志捷. Cu(SCN)2-水系电沉积制备CuSCN薄膜[J]. 应用化学,
2005, 22(2): 138-141.
Citation: HUA Zhen, JIN Zheng-Guo, WU Wei-Bing, CHENG Zhi-Jie. Preparation of p-CuSCN Thin Film by Electrochemical Deposition in Aqueous Solution[J]. Chinese Journal of Applied Chemistry, 2005, 22(2): 138-141.
Citation: HUA Zhen, JIN Zheng-Guo, WU Wei-Bing, CHENG Zhi-Jie. Preparation of p-CuSCN Thin Film by Electrochemical Deposition in Aqueous Solution[J]. Chinese Journal of Applied Chemistry, 2005, 22(2): 138-141.
Cu(SCN)2-水系电沉积制备CuSCN薄膜
摘要:
用电化学沉积法,以水作溶剂,在ITO透明导电玻璃上制得p-CuSCN薄膜。探讨了Cu(SCN)2在水溶液中的不稳定性及EDTA络合对提高CuSO4和KSCN水溶液稳定性的作用。研究结果表明,未加EDTA络合剂时,CuSO4和KSCN在水溶液中将分解成CuSCN和(SCN)x;加入EDTA可以制得稳定的CuSO4和KSCN的水溶液;在-400 mV恒电位下,在EDTA与Cu2+的摩尔比为1:1的水溶液中可以制备出在可见光区透光性好的CuSCN薄膜,薄膜的平均粒径约为50 nm,是p型的β-CuSCN半导体,光学带隙为3.8 eV,测得的表面电导率为0.8×10-3 S/cm。
English
Preparation of p-CuSCN Thin Film by Electrochemical Deposition in Aqueous Solution
Abstract:
CuSCN thin films were prepared by the electrodeposition method from an EDTA-chelated Cu(Ⅱ) and KSCN aqueous solution. The instability of Cu(SCN)2 in water and function of EDTA complexant on improving the stability of CuSO4 and KSCN solution were studied. The results show that Cu(SCN)2 can transform into CuSCN and (SCN)x in the absence of EDTA; a stable aqueous electrolyte is obtained in the presence of EDTA. Transparent CuSCN thin film is prepared in an aqueous electrolyte when the molar ratio of Cu2+ to EDTA is 1:1 and Cu2+ to SCN- 4:1. The average crystal size of CuSCN thin film is 50 nm, band gap ~3.8 eV and conductivity up to 0.8×10-3 S/cm.
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Key words:
- p-CuSCN
- / electrochemical deposition
- / EDTA complexant
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