Figure 6
From: Effect of ZnCdTe-Alloyed Nanocrystals on Polymer–Fullerene Bulk Heterojunction Solar Cells
Schematic ofVocin ITO/PEDOT:PSS/MEH-PPV:C60(+ZnCdTe)/Al blend film devices with concentration of ZnCdTe. For an undoped MEH-PPV:C60device,Vocis dominated by the system of MEH-PPV:C60(Voc1). With the increasing concentration of ZnCdTe, the limitation for resultingVoc, corresponding to an MEH-PPV:C60 (+ZnCdTe) composite device, at the negative electrode gradually shifts towards the LUMO energy level of ZnCdTe (Vocn). When the LUMO of acceptor (ZnCdTe) completely acts as the limitation forVoc, the resultingVoccan be expressed byVoc2