A Polybenzo[1,2-b:4,5-b′]dithiophene Derivative with Deep HOMO Level and Its Application in High-Performance Polymer Solar Cells


  • The authors would like to acknowledge the financial support from AFOSR (Grant No. FA9550-07-1-0264). J.H. designed the polymer structures and synthesis routes. L.H. and S.Z. performed the synthesis of polymers. H.Y.C. performed the polymer solar cell fabrication experiments and measurements. Y.Y. and J.H. conceptualized and directed the research project. All authors discussed the results and commented on the manuscript.


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Sun catcher: The new benzo[1,2-b:4,5-b′]dithiophene-containing polymer PBDTTBT exhibits a power conversion efficiency of up to 5.66 %. The high open-circuit voltage (0.92 V) originates from the low HOMO level of the polymer and the high internal and external quantum efficiencies over a wide spectral range. PBDTTBT is a promising donor material for application in polymer solar cells.