Журнал "Макрогетероциклы"

Vlad V. Travkin, Anton N. Fedoseev, Yury I. Sachkov, and Georgy L. Pakhomov^@ 

Institute for Physics of Microstructures of the Russian Academy of Sciences (IPM RAS), 603950 Nizhny Novgorod, Russian Federation

^@Corresponding author E-mail: pakhomov@ipmras.ru

DOI: 10.6060/mhc190448p

Macroheterocycles 2019 12(2) 198-201

The effect of titanyl phthalocyanine TiOPc in the methylammonium lead triiodide (MAPbI₃) perovskite based solar cells is studied. The photovoltaic output of cells at low intensity illumination with l_max= 840 nmis greatly enhanced when using TiOPc as a NIR-absorbing hole conductor. Compared to the reference cells with a standard cuprous iodide CuI as a hole-transporting layer, the photocurrent increases by a factor of 15, so that the narrow-band power conversion efficiency (PCE) exceeds 2 %. It should be pointed out that the irradiation wavelength lies beyond the intrinsic absorption of MAPbI₃ or any other material in the device scheme except TiOPc. The improvement is associated with the photoactivity of TiOPc molecules in the near infrared region due to the largely splitted Q-band, as confirmed by the dependence of parameters on the polymorph transition in the TiOPc films.