International Conference of Physicists.SPb, October 20-24, 2025, Saint Petersburg

Study of the influence of spin-coating parameters and PEDOT:PSS suspension composition on the performance of $b$-Si/PEDOT:PSS solar cells

V. A. Pozdeev^a, E. A. Vyacheslavova^a, O. P. Mikhaylov^a, A. A. Maksimova^ab, A. S. Gudovskikh^ab, A. V. Uvarov<sup>a

a</sup> Alferov Federal State Budgetary Institution of Higher Education and Science Saint Petersburg National Research Academic University of the Russian Academy of Sciences, 194021 St. Petersburg, Russia
^b Saint Petersburg Electrotechnical University "LETI", 197376 St. Petersburg, Russia

Abstract: The paper studies the influence of spin-coating parameters, annealing and PEDOT:PSS suspension composition on the characteristics of a solar cell based on silicon with a nanostructured surface (“black silicon”). The optimal rotation speeds, annealing temperatures and durations for these substrates and suspension compositions are determined: 3000 rpm, 130$^\circ$C, 10 min. It is shown that a layer of natural silicon oxide formed in 30 min has a positive effect on the characteristics of the solar cell. Also, an improvement in the characteristics of solar cells was revealed when 6 vol.% isopropyl alcohol and 7.5 vol.% dimethyl sulfoxide were added to the PEDOT:PSS suspension as co-solvents.

Received: 05.05.2025
Revised: 01.07.2025
Accepted: 09.07.2025

DOI: 10.61011/FTP.2025.05.61474.8075