Superconductivity at 33 K in potassium-doped 1,2:8,9-dibenzopentacene
  We report the observation of superconductivity at 33 K in K-doped 1,2:8,9-dibenzopentacene (C30H18). This is higher than any Tc reported previously for an organic superconductor besides the alkali-metal doped C60. This finding provides an indication that superconductivity at much higher temperature may be possible in such system, if PAHs with longer benzene rings can be synthesized. 
Mianqi Xue, Tingbing Cao, Duming Wang, Yue Wu, Huaixin Yang, Xiaoli   Dong, Junbao He, Fengwang Li, G. F. Chen
cond-mat.supr-con cond-mat.mtrl-sci