Influence of technological parameters on the characteristics of photosensitive structures based on metal phthalocyanine using a non-fullerene acceptor

Subject of study. This study investigated photosensitive structures with a planar heterojunction based on copper phthalocyanine and 3,4,9,10-perylenetetracarboxylic dianhydride. Aim of study. The aim of this study was to develop organic photosensitive structures based on metal phthalocyanine and a non-fullerene acceptor. Method. Photosensitive structures were fabricated using vacuum thermal deposition. Absorption and photocurrent spectra of these structures were measured. Main results. The optimal parameters for fabricating organic photosensitive structures using a non-fullerene acceptor were determined. The optimal substrate heating temperatures, which influence the quality of the deposited layers, were 60°C and 55°C for copper phthalocyanine and 3,4,9,10-perylenetetracarboxylic dianhydride, respectively. The primary contribution to the photoresponse of the structure was determined to be the charge-carrier generation in copper phthalocyanine. The influence of the evaporated donor mass on the photosensitivity spectra of the structures was also determined. The studied structures exhibited a photoresponse in the energy range of 1.35–2.45 eV. Practical significance . The results of this work can be used in the development of photodetectors based on organic materials for the visible and near-infrared spectral ranges for applications in communication systems, visualization, spectroscopy, medical diagnostics, and other fields. In addition, the developed structures incur lower production costs compared to devices based on conventional inorganic semiconductors.