Photovoltaic characteristics of Pd doped amorphous carbon film/SiO2/Si

Ming Ma; Qingzhong Xue; Huijuan Chen; Xiaoyan Zhou; Dan Xia; Cheng Lv; Jie Xie
August 2010
Applied Physics Letters;8/9/2010, Vol. 97 Issue 6, p061902
Academic Journal
The Pd doped amorphous carbon (a-C:Pd) films were deposited on n-Si substrates with or without a native SiO2 layer using magnetron sputtering. The photovoltaic characteristics of the a-C:Pd/SiO2/Si and a-C:Pd/Si junctions were studied. It is found that under light illumination of 15 mW/cm2 at room temperature, the a-C:Pd/SiO2/Si solar cell fabricated at 350 °C has a high power conversion efficiency of 4.7%, which is much better than the a-C/Si junctions reported before. The enhanced conversion efficiency is ascribed to the Pd doping and the increase in sp2-bonded carbon clusters in the carbon film caused by the high temperature deposition.


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