Publications (4)4.54 Total impact
Article: The role of energy level matching in organic solar cells-Hexaazatriphenylene hexacarbonitrile as transparent electron transport material[show abstract] [hide abstract]
ABSTRACT: We introduce the material hexaazatriphenylene hexacarbonitrile (HATCN) as electron conducting window layer for separating the photoactive region from the cathode in organic p-i-n type solar cells. HATCN has a wide band gap of 3.3 eV and is thus transparent in the visible range of the solar spectrum. Its electrical properties can be tuned by means of molecular n-doping which leads to an increase of electron conductivity by several orders of magnitude up to 2.2 x 10(-4) S/cm. However, an application in photovoltaic devices is restrained by its exceptionally high electron affinity, estimated 4.8 eV, which introduces an electron injection barrier to the photoactive acceptor material C-60. Here, we present a strategy to remove this barrier by means of introducing doped and undoped C-60 intermediate layers, thus demonstrating the importance of energy level matching in a multiple layer structure and the advantages of Fermi level control by doping. (C) 2010 Elsevier B.V. All rights reserved.Solar Energy Materials and Solar Cells 12/2011; 95:927-932. · 4.54 Impact Factor
Article: Structure and Optical Absorption of Oligo(p- and m-phenylenevinylenes) and Their Radical Anions: A Comparative Theoretical Study04/2002;
Article: The role of energy level matching in organic solar cells-Hexaazatriphenylene hexacarbonitrile as transparent electron transport materialSolar Energy Materials and Solar Cells, v.95, 927-932 (2011).