Spivak Yuliya, Muratova Ekaterina, Moshnikov Vyacheslav, Tuchkovsky Alexander, Vrublevsky Igor, Lushpa Nikita
Saint Petersburg Electrotechnical University "LETI", 197376 Saint Petersburg, Russia.
R&D Laboratory of Materials and Components of Electronics and Superconducting Equipment, Belarusian State University of Informatics and Radioelectronics, 220013 Minsk, Belarus.
Materials (Basel). 2022 Jan 27;15(3):990. doi: 10.3390/ma15030990.
Among conductive polymers, PEDOT films find the widest application in electronics. For photovoltaic applications, studies of their optical properties, stability, and electrical conductivity are of greatest interest. However, the PEDOT:PSS transport layers, when used in photovoltaic cells, have a high electrical resistance, which prevents solar cells from increasing their efficiency. One of the promising ways to improve their electrical properties is the use of composite materials based on them, in which the conductivity can be increased by introducing various additives. In this work, conductive polymer films PEDOT:PSS (poly (3,4-ethylenedioxythiophene):polystyrene sulfonate acid) doped with a number of amines (Pentylamine, Octylamine, Diethylamine, Aniline with carbon nanotubes) were obtained and studied. It is shown that, depending on the concentration of dopants, the electrical conductivity of PEDOT:PSS films can be significantly improved. In this case, the light transmission of the films practically does not change. The process of improving the conductivity by treating the surface of the finished film with amines, followed by heat treatment, was studied. It is assumed that the improvement in conductivity is the result of the self-assembly of monolayers of organic molecules on the surface of the PEDOT:PSS film leading to its -doping due to intermolecular interaction.
在导电聚合物中，聚（3,4 - 乙撑二氧噻吩）：聚苯乙烯磺酸（PEDOT:PSS）薄膜在电子领域有着最广泛的应用。对于光伏应用而言，对其光学性质、稳定性和电导率的研究最受关注。然而，PEDOT:PSS传输层在用于光伏电池时具有高电阻，这阻碍了太阳能电池提高其效率。改善其电学性能的一种有前景的方法是使用基于它们的复合材料，其中通过引入各种添加剂可以提高导电性。在这项工作中，制备并研究了掺杂多种胺（戊胺、辛胺、二乙胺、苯胺与碳纳米管）的导电聚合物薄膜PEDOT:PSS。结果表明，根据掺杂剂的浓度，PEDOT:PSS薄膜的电导率可以显著提高。在这种情况下，薄膜的透光率实际上没有变化。研究了通过用胺处理成品薄膜表面然后进行热处理来提高电导率的过程。据推测，电导率的提高是由于有机分子单层在PEDOT:PSS薄膜表面自组装，通过分子间相互作用导致其n型掺杂的结果。
