Hole-trapping in molecularly doped polymers

Paul M. Borsenberger; William T. Gruenbaum; Liang-Bih Lin; Susan A. Visser

doi:10.1117/12.305424

17 April 1998 Hole-trapping in molecularly doped polymers

Paul M. Borsenberger, William T. Gruenbaum, Liang-Bih Lin, Susan A. Visser

Proceedings Volume 3281, Polymer Photonic Devices; (1998) https://doi.org/10.1117/12.305424
Event: Optoelectronics and High-Power Lasers and Applications, 1998, San Jose, CA, United States

Abstract

Hole mobilities have been measured in tri-p-tolylamine (TTA) doped poly(styrene) containing different concentrations of di- p-tolyl-p-anisylamine (DTA) or tri-p-anisylamine (TAA). DTA and TAA are traps with depths of 0.08 and 0.22 eV, respectively. For low concentrations of DTA or TAA, the transport processes are trap controlled and the mobilities decrease with increasing trap concentration. For high TAA concentrations, however, the transport processes are dominated by trap-to-trap hopping and the mobilities increase with increasing trap concentrations. The threshold concentration for the transition from trap controlled to trap-to-trap transport is approximately 10^-1. A transition to trap- to-trap hopping is not observed for TTA containing DTA. The results are discussed within the framework of the Hoesterey- Letson formalism and the recent simulations of Wolf et al. and Borsenberger et al.

Citation Download Citation

Paul M. Borsenberger, William T. Gruenbaum, Liang-Bih Lin, and Susan A. Visser "Hole-trapping in molecularly doped polymers", Proc. SPIE 3281, Polymer Photonic Devices, (17 April 1998); https://doi.org/10.1117/12.305424

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