Enhanced Performance of PDPP3T/ ${\rm PC}_{60}{\rm BM}$ Solar Cells Using High Boiling Solvent and UV - Ozone Treatment
作者： Prajwal Adhikary , Swaminathan Venkatesan , Purna P. Maharjan , David Galipeau , Qiquan Qiao
关键词: Solar cell 、 Ultraviolet 、 Energy conversion efficiency 、 Spin coating 、 Analytical chemistry 、 Polymer solar cell 、 Chemistry 、 Open-circuit voltage 、 Short circuit 、 PEDOT:PSS
摘要: Using higher temperature without any additives, poly(diketopyrrolopyrrole-terthiophene) was successfully dissolved with PC60BM in a commonly used high-boiling point solvent namely chlorobenzene (CB). Use of CB allowed us to heat the blend solution at temperature, which leads improved nanoscale phase separation between donor and acceptor, is important for an efficient exciton dissociation. Devices were fabricated both regular inverted bulk heterojunction structure comparison by spin coating active layer. Inverted solar cells exhibited power conversion efficiency than significant improvement current density, possibly attributed increased light absorption layer due less parasitic PEDOT:PSS Ca layer, normal structures. Furthermore, ultraviolet (UV) ozone treatment ZnO film cell performance. A UV 5 min found be optimal time resulting highest device (4.45%) short circuit density 9.3 mA/cm2, open voltage 0.69, fill factor 69.5% need additives.
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