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  • Order enables efficient electron-hole separation at an organic heterojunction with a small energy loss. 

    Menke, Stephen Matthew; Cheminal, Alexandre Georges; Conaghan, Patrick; Ran, Niva A; Greehnam, Neil C; Bazan, Guillermo C; Nguyen, Thuc-Quyen et al.
    Donor-acceptor organic solar cells often show low open-circuit voltages (VOC) relative to their optical energy gap (Eg) which limit power conversion efficiencies to around 12%. This energy loss is attributed, in part, to ...
  • Singlet exciton fission in solution 

    Walker, Brian J; Musser, Andrew Joseph; Beljonne, David; Friend, Richard Henry (Nature Publishing Group, 2013-11-17)
    Singlet exciton fission, the spin-conserving process that produces two triplet excited states from one photoexcited singlet state, is a means to circumvent the Shockley–Queisser limit in single-junction solar cells. Although ...
  • The Role of Spin for Kinetic Control of Recombination in Organic Photovoltaics 

    Akshay, Rao; Philip, CY Chow; Gélinas, Simon; Schlenker, Cody W; Li, Chang-Zhi; Yip, Hin-Lap; Jen, Alex K-Y et al. (Nature Publishing Group, 2013-08-07)
    In biological complexes, cascade structures promote the spatial separation of photogenerated electrons and holes, preventing their recombination. In contrast, the photogenerated excitons in organic photovoltaic cells are ...