SEBASTIAN, JOSEPH, and C.S. MENON. “Electrical and Optical Characterization of Thermally Evaporated Titanyl Phthalocyanine Thin Films”. Asian Journal of Chemistry, vol. 19, no. 6, Mar. 2010, pp. 4353-62, https://asianpubs.org/index.php/ajchem/article/view/19945.