Abstract
A quadratic dependence of the charge diffusion coefficient on the diameter of colloidal quantum dots (CQDs) has been established. The charge diffusion coefficient is shown to depend weakly on the polydispersity of a sample. It has been determined that a decrease in the root-mean-square displacement of a charge carrier is an exponential function of the thickness of a ligand shell and the relative fraction of particles that can become charge traps. An explanation has been proposed for the exponential dependence of the conductivity of PbS CQD layers on the CQD size, which consists in a decrease in the fraction of CQDs acting as charge carrier traps.
This is a preview of subscription content, log in via an institution to check access.
REFERENCES
Yu, D., Wang, C., Wehrenberg, B.L., and Guyot-Sionnest, P., Phys. Rev. Lett., 2004, vol. 92, p. 216802-1.
Gilmore, R.H., Lee, E.M.Y., Weidman, M.C., Willard, A.P., and Tisdale, W.A., Nano Lett., 2017, vol. 17, p. 893.
Proppe, A.H., Xu, J., Sabatini, R.P., Fan, J.Z., Sun, B., Kelley, S.O., Voznyy, O., and Sargent, E.H., Nano Lett., 2018, vol. 18, p. 7052.
Weidman, M.C., Beck, M.E., Hoffman, R.S., Prins, F., and Tisdale, W.A., ACS Nano, 2014, vol. 8, p. 6363.
Poddubny, A.N., Litvyak, V.M., Nestoklon, M.O., Cherbunin, R.V., Golubkov, V.V., Onushchenko, P.A., Babkina, A.N., Onushchenko, A.A., and Goupalov, S.V., J. Phys. Chem. C, vol. 121, p. 27766.
Moreels, I., Lambert, K., Smeets, D., Muynck, D., Nollet, T., Martins, J.C., Vanhaecke, F., Vantomme, A., Delerue, C., Allan, G., and Hens, Z., ACS Nano, 2009, vol. 3, p. 3023.
Nevidimov, A.V. and Razumov, V.F., Colloid J., 2016, vol. 78. p. 641.
Funding
This work was supported by the Russian Science Foundation (project no. 21-73-20245) and carried out within the framework of state contract no. AAAA-A19-119070790003-7 in terms of performing calculations using computer resources of the Federal Research Center for Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
The authors of this work declare that they have no conflicts of interest.
Additional information
Translated by V. Makhlyarchuk
Publisher’s Note.
Pleiades Publishing remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Nevidimov, A.V. Computer Simulation of Charge Carrier Transport Processes in the Conducting Layers of Colloidal Quantum Dots. High Energy Chem 57 (Suppl 3), S441–S444 (2023). https://doi.org/10.1134/S0018143923090114
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0018143923090114