| XUE Yu-ming,GAO Lin,YIN Fu-hong,QIAO Zai-xiang,LIU Hao,FENG Shao-jun,SUN Hai-tao,HANG Wei.Research on structural characteristics of large-scale CdS thin films deposited by CBD under low ammonia condition[J].Optoelectronics Letters,2015,11(4):273-276 |
| Research on structural characteristics of large-scale CdS thin films deposited by CBD under low ammonia condition |
| Author Name | Affiliation | | XUE Yu-ming | Tianjin Key Laboratory of Film Electronic and Communication Devices, Department of Electronics Information Engineering, Tianjin University of Technology, Tianjin 300384, China | | GAO Lin | Tianjin Key Laboratory of Film Electronic and Communication Devices, Department of Electronics Information Engineering, Tianjin University of Technology, Tianjin 300384, China | | YIN Fu-hong | Tianjin Key Laboratory of Film Electronic and Communication Devices, Department of Electronics Information Engineering, Tianjin University of Technology, Tianjin 300384, China | | QIAO Zai-xiang | National Key Laboratory of Power Sources, Tianjin Institute of Power Sources, Tianjin 300381, China | | LIU Hao | Tianjin Key Laboratory of Film Electronic and Communication Devices, Department of Electronics Information Engineering, Tianjin University of Technology, Tianjin 300384, China | | FENG Shao-jun | Tianjin Key Laboratory of Film Electronic and Communication Devices, Department of Electronics Information Engineering, Tianjin University of Technology, Tianjin 300384, China | | SUN Hai-tao | Tianjin Key Laboratory of Film Electronic and Communication Devices, Department of Electronics Information Engineering, Tianjin University of Technology, Tianjin 300384, China | | HANG Wei | Tianjin Key Laboratory of Film Electronic and Communication Devices, Department of Electronics Information Engineering, Tianjin University of Technology, Tianjin 300384, China |
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| Abstract: |
| Cadmium sulfide (CdS) buffer layers with the scale of 10 cm×10 cm are deposited by chemical bath deposition (CBD) with different temperatures and thiourea concentrations under low ammonia condition. There are obvious hexagonal phases and cubic phases in CdS thin films under the conditions of low temperature and high thiourea concentration. The main reason is that the heterogeneous reaction is dominant for homogeneous reaction. At low temperature, CdS thin films with good uniformity and high transmittance are deposited by adjusting the thiourea concentration, and there is almost no precipitation in reaction solution. In addition, the low temperature is desired in assembly line. The transmittance and the band gap of CdS thin films are above 80% and about 2.4 eV, respectively. These films are suitable for the buffer layers of large-scale Cu(In,Ga)Se2 (CIGS) solar cells. |
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| This work has been supported by the National High Technology Research and Development Program of China (No.2012AA050701). |
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