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Keywords:

  • electronic structure;
  • photochemistry;
  • polymers;
  • solar cells
Thumbnail image of graphical abstract

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.