gap    sys
 0.18  hexacene
 0.44  pentaceneN2Cl4
 0.60  dibenzoindigo
 0.62  pentacene
 0.84  TCNQ-F2
 0.89  indigoCl2
 0.95  DATT
 0.95  indigo
 1.09  PDI
 1.13  PTCDA
 1.14  tetracene
 1.18  TCNQ-F4
 1.18  TCNQ
 1.26  C60