Assertion: solar cell's efficiency | /r/HasProperty | demonstrated for larger sno 2 composition
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text: An improved efficiency was demonstrated for the larger SnO 2 composition and an overall power conversion efficiency (PCE) observed for SnO 2 : ZnO device was increased from 0.18% (3:97 mol%) to 0.26% for a device with SnO 2 :ZnO (5:95 mol%) photoanode.