Role of a trap in disordered OLED host-guest systems

Andrei Stankevych, Naomi Kinaret, Andriy Zhugayevych, Rishabh Saxena, Alexander Vakhnin, Kun-Han Lin, Denis Andrienko, Heinz Bässler, Anna Köhler and Andriy Kadashchuk

Extrinsic traps created by dopants or impurities are ubiquitous in organic semiconductors and can critically influence charge transport. Here we report a comprehensive study, using low-temperature thermally stimulated luminescence measurements complemented by quantum mechanics and molecular dynamics (QM-MD) calculations, as well as kinetic Monte Carlo (KMC) simulations, to investigate trapping and energetic relaxation of charge […]