Fullerene solar cells with cholesteric liquid crystal doping
Jiang Lulu1, Jiang Yurong1, 2, Zhang Congcong1, Chen Zezhang1, Qin Ruiping1, 2, Ma Heng1, 2, †,
       

XRD spectra of the active layer films with and without HCO doping under the same standard (the ordinate increased a certain values).