“The characterization of chloroboron (III) subnaphthalocyanine thin films and their application as a donor material for organic solar cells,” B. Verreet, S. Schols, D. Cheyns, B.P. Rand, H. Gommans, T. Aernouts, P. Heremans, J. Genoe, J. Mater. Chem., 19,