AVS 56th International Symposium & Exhibition
    Thin Film Thursday Sessions
       Session TF-ThP

Paper TF-ThP4
Influence of Non-uniformity and Surface Morphology of Sputtering Deposited CdTe Thin Films in a Large-area on Energy Conversion Efficiency of Solar Cells

Thursday, November 12, 2009, 6:00 pm, Room Hall 3

Session: Aspects of Thin Films Poster Session
Presenter: J. Park, Chosun University, Korea
Authors: J. Park, Chosun University, Korea
C. Lim, Chosun University, Korea
S. Ryu, Chosun University, Korea
N. Kim, Chonnam National University, Korea
W Lee, Chosun University, Korea
Correspondent: Click to Email
The thin-film CdTe solar cell technology is theoritically well known that it can improve the conversion efficiency and production costs compared to the conventional silicon solar cell technology. Due to the optimal band gap energy (about 1.4eV) for solar energy absorption, high light absorption capability and low cost requirements for producing solar cells, CdTe has been widely researched as the suitable for the commercializ ation . In this study, the sputtering method, which can improve the cost-efficiency and mass production of solar cells, was employed to deposit the CdTe thin film on the large-area substrates with the various processing conditions such as gas pressure, power, and the distance to the target. The non-uniformity and surface morphology were analyzed using AFM and SEM in the large-areaed surface of CdTe thin-films deposited with the various processing conditions; likewise, the effects of the processing conditions on the non-uniformity and surface-morphology of the thin-film surface were compared. Also, the optical and electrical characteristics of CdTe thin films with the globally and locally difference in non-uniformity and surface morphology in a large-area were compared; thus, the effects of them on the efficiency of the sputter ing deposited thin film CdTe solar cells in a large-area were examined .