Donor-accentor injection sensitization of photoeffect: charge phototransfer through a wide dielectric barrier

High probability (up to 100% at 300 K) of charge phototransfer through a wi de (comparable with the exciting light wavelength) dielectric barrier with acceptors-p-elements (S, Se) and donors-nitrogen-containing aromatic molecu les an its boundaries was experimentally confirmed. An earlier unknown long -range D-A interaction was found in such a barrier and it was shown that, s imilar to a very narrow barrier, it is just this interaction which determin es the phototransfer efficiency. (C) 1999 The Optical Society of America. [ S1070-9762(99)00807-6].