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Seki K, Wojcik M, Tachiya M. Dispersive-diffusion-controlled distance-dependent recombination in amorphous semiconductors. J Chem Phys. 2006;124(4):044702doi: 10.1063/1.2161213.
Seki, K., Wojcik, M., & Tachiya, M. (2006). Dispersive-diffusion-controlled distance-dependent recombination in amorphous semiconductors. The Journal of chemical physics, 124(4), 044702. https://doi.org/10.1063/1.2161213
Seki, Kazuhiko, et al. "Dispersive-diffusion-controlled distance-dependent recombination in amorphous semiconductors." The Journal of chemical physics vol. 124,4 (2006): 044702. doi: https://doi.org/10.1063/1.2161213
Seki K, Wojcik M, Tachiya M. Dispersive-diffusion-controlled distance-dependent recombination in amorphous semiconductors. J Chem Phys. 2006 Jan 28;124(4):044702. doi: 10.1063/1.2161213. PMID: 16460195.
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J Chem Phys. 2006 Jan 28;124(4):044702. doi: 10.1063/1.2161213.

Dispersive-diffusion-controlled distance-dependent recombination in amorphous semiconductors.

The Journal of chemical physics

Kazuhiko Seki, Mariusz Wojcik, M Tachiya

Affiliations

  1. National Institute of Advanced Industrial Science and Technology, AIST Tsukuba Central 5, Tsukuba, Ibaraki 305-8565, Japan. [email protected]

PMID: 16460195 DOI: 10.1063/1.2161213

Abstract

The photoluminescence in amorphous semiconductors decays according to the power law t(-delta) at long times. The photoluminescence is controlled by dispersive transport of electrons. The latter is usually characterized by the power alpha of the transient current observed in the time-of-flight experiments. Geminate recombination occurs by radiative tunneling which has a distance dependence. In this paper, we formulate ways to calculate reaction rates and survival probabilities in the case carriers execute dispersive diffusion with long-range reactivity. The method is applied to obtain tunneling recombination rates under dispersive diffusion. The theoretical condition of observing the relation delta=alpha/2+1 is obtained and theoretical recombination rates are compared to the kinetics of observed photoluminescence decay in the whole time range measured.

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