The effect of impurities on the doping and VOC of CdTe/CdS thin film solar cells Zhao, H. ; Farah, Alvi ; Morel, D. ; Ferekides, C. S. Abstract Publication: Thin Solid Films Pub Date: February 2009 DOI: 10.1016/j.tsf.2008.11.041 Bibcode: 2009TSF...517.2365Z