Improved transient electroluminescence technique based on time-correlated single-photon counting technology to evaluate organic mobility.

ABSTRACT: The transient electroluminescence (EL) technique is widely used to evaluate the carrier mobility in the field of organic light emitting diodes. The traditional analog detection strategy using oscilloscopes is generally limited since the background noise causes an underestimation of the mobility value. In this paper, we utilize time-correlated single-photon counting (TCSPC) to probe the transient EL for mobility calculation. The measurements on tris(8-hydroxyquinoline) aluminum (Alq₃) show that the electron mobilities obtained using the TCSPC technique are slightly higher than those obtained from the analog method at all the investigated voltages. Moreover, the TCSPC mobilities demonstrate weaker dependence on the root of electrical field compared to the oscilloscope mobilities.

SUBMITTER: Qiao X 

PROVIDER: S-EPMC9756201 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature