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Paper on ternary sensitized modules with efficiencies exceeding 8 % in Energy & Environmental Science

Our new paper on ternary sensitized modules with module efficiencies exceeding 8 % just went online in Energy & Environmental Science.

Ternary blend organic solar cells (OSCs) comprising multiple donor or acceptor materials in an active layer have emerged as a fascinating alternative to design customized photovoltaic composites. In the recent years we have engineered ternary composites such as to

  1. guarantee spectrally broad absorption
  2. maximize open circuit voltages and
  3. reduce parasitic loss mechanisms like non-radiative recombination

Nicola showed in a previous manuscript (N. Gasparini et al, Nature Energy 2016) a novel approach to design ternary composites with dramatically reduced recombination losses yielding fill factors (FF) as high as 77 %. Building on that understanding Nicola sensitized a commercial polymer with PTB7-th such that he could form 300 nm thick active layers without running into recombination losses. This allowed us to demonstrate +8 % mini-modules on glass and app 7% mini-modules on flex.

Paper online at Energy & Environmental Science