Copper(II) meso-Tetraphenyl- and meso-Tetrafluorenyl Porphyrinates as Charge Carrier Transporting and Electroluminescent Compounds

Andrey Yu Chernyadyev; Alexey E Aleksandrov; Dmitry A Lypenko; Vladimir S Tyurin; Alexey R Tameev; Aslan Yu Tsivadze

doi:10.1021/acsomega.1c06557

Copper(II) meso-Tetraphenyl- and meso-Tetrafluorenyl Porphyrinates as Charge Carrier Transporting and Electroluminescent Compounds

ACS Omega. 2022 Mar 1;7(10):8613-8622. doi: 10.1021/acsomega.1c06557. eCollection 2022 Mar 15.

Authors

Andrey Yu Chernyadyev¹, Alexey E Aleksandrov¹, Dmitry A Lypenko¹, Vladimir S Tyurin¹, Alexey R Tameev¹, Aslan Yu Tsivadze¹

Affiliation

¹ Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky prosp. 31, bld. 4, Moscow 119071, Russia.

Abstract

Studies on copper(II) tetrafluorenyl porphyrinate (CuTFP) and copper(II) tetraphenyl porphyrinate (CuTPP) have been focused on the charge carrier transport in their solid films and electroluminescence of their composites. In the dye layers deposited by resistive thermal evaporation, the mobilities of holes and electrons are on the order of 10^-5 and 10^-6 cm² V^-1 s^-1 for the charge transport under the influence of traps, and the charge mobility reaches the order of 10^-3 cm² V^-1 s^-1 at space-charge-limited current in the nontrapping mode. For the dye molecules, the correlation between the mobility of charge carriers and the distribution of the electron density on the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO), which serve as hopping sites for holes and electrons, respectively, is considered. Organic light-emitting diodes incorporating the dye molecules as emitting dopants demonstrate electroluminescence in the near-infrared (IR) range.