ИСТИНА

Currently a wide range of organic hole-transport materials based on triphenylamine (TPA) derivatives, which are important components of organic electronics and photonics devices, have been developed. Among them special attention is paid to polymers [1, 2], since compared with low molecular weight compounds TPA-based polymers have better thermal stability, good film-forming properties, and improved adhesion to the substrate. The optoelectronic properties of conjugated polymers can be effectively controlled by intramolecular charge transfer via donor–acceptor (D-A) interactions [3, 4]. The introduction of electron-withdrawing groups makes it possible to change the light absorption region, vary the energy of the HOMO and LUMO levels, and reduce the band gap of hole-transport materials. The currently known examples of D-A polymers based on triphenylamine, as a rule, are obtained by cross-coupling reactions using expensive catalysts [4]. The simplest method for synthesizing such polymers is oxidative polymerization with FeCl3 [3]. In this work, D-A polymers based on TPA were obtained by oxidative polymerization with FeCl3 (Fig. 1). The properties of the obtained compounds were studied. The data obtained in the study of polymers as hole-transport layers of perovskite solar cells are presented. Figure 1 - Structural formulas of D-A homopolymers This work was supported by the Ministry of Science and Higher Education of the Russian Federation (grant № 075-15-2024-532).