爵士乐具有可调开路电压高效三元混合体异质结太阳能电池.pdfVIP

COMMUNICATION /JACS Efficient Ternary Blend Bulk Heterojunction Solar Cells with Tunable Open-Circuit Voltage Petr P. Khlyabich, Beate Burkhart, and Barry C. Thompson* Department of Chemistry and Loker Hydrocarbon Research Institute, University of Southern California, Los Angeles, California 90089 1661, United States bSupporting Information : To explore the potential of ternary blend bulk heterojunction (BHJ) photovoltaics as a general t form for reasing the attainable performance of organic solar cells, a model system based on poly(3 hexylthiophene) (P3HT) as the donor and two soluble fullerene acceptors, phenyl C61 butyric acid methyl ester (PC61BM) and in dene C60 bisadduct (ICBA), wa amined. In all of the solar cells, the overall ratio of polymer to fullerene was maintained at 1:1, while the composition of the fullerene component (PC61BM:ICBA ratio) was varied. Photovoltaic devices showed high short circuit current densities (Jsc) and fill factors (FF) (0.57) at all fullerene ratios, while the open circuit voltage (Voc) was found to vary from 0.61 to 0.84 V as the fraction of ICBA was reased. These results indicate that the Voc in ternary blend BHJ solar cells is not Figure 1. Structures and corresponding HOMO and LUMO energy levels of P3HT, ICBA, and PC61BM. limited to the smallest Voc of the corresponding binary blend solar cells but can be varied between the extreme V o