Small reorganization energy acceptors enable low energy losses in non-fullerene organic solar cells

Minimizing energy loss is of critical importance in the pursuit of attaining high-performance organic solar cells. Interestingly, reorganization energy plays a crucial role in photoelectric conversion processes. However, the understanding of the relationship between reorganization energy and energy losses has rarely been studied. Here, two acceptors, Qx-1 and Qx-2, were developed. The reorganization energies of these two acceptors during photoelectric conversion processes are substantially smaller than the conventional Y6 acceptor, which is beneficial for improving the exciton lifetime and diffusion length, promoting charge transport, and reducing the energy loss originating from exciton dissociation and…

• CS
  Commonwealth Scientific and Industrial Research Organisation

  Award: 121E32KYSB20190021
• NN
  National Natural Science Foundation of China

  Awards: 21773040, 21822503, 51973043, 21721002, 22073020, XDB36000000, 22135001, 121E32KYSB20190021
• CA
  Chinese Academy of Sciences

  Awards: XDB36000000, No. XDB36000000, 21721002, 121E32KYSB20190021
• BN
  Beijing Normal University