Effect of oligothiophene spacer length on photogenerated charge transfer from perylene diimide to boron-doped diamond electrodes

0561890 - FZÚ 2023 RIV NL eng J - Journal Article
Lopez-Carballeira, D. - Raymakers, J. - Artemenko, Anna - Lenaerts, R. - Čermák, Jan - Kuliček, J. - Nicley, S.S. - Kromka, Alexander - Haenen, K. - Maes, W. - Rezek, B.
Effect of oligothiophene spacer length on photogenerated charge transfer from perylene diimide to boron-doped diamond electrodes.
Solar Energy Materials and Solar Cells. Roč. 248, Dec. (2022), č. článku 111984. ISSN 0927-0248. E-ISSN 1879-3398
Research Infrastructure: e-INFRA CZ - 90140; CzechNanoLab - 90110
Institutional support: RVO:68378271
Keywords : diamond * donor-acceptor molecules * photovoltage * charge transfer * time-dependent DFT
OECD category: Coating and films
Impact factor: 6.9, year: 2022
Method of publishing: Limited access
https://doi.org/10.1016/j.solmat.2022.111984

Organic-based photovoltaic devices emerged as a complementary technology to silicon solar cells with specific advantages in terms of cost, ease of deployment, etc. In this work, thin-film B:NCD electrodes are employed for their useful optical, electronic, and chemical properties. A set of oligothiophene perylene diimide donor-acceptor chromophores is designed and synthesized in order to investigate the influence of the oligothiophene spacer length when the molecule is attached to a B:NCD. XPS shows that the surface coverage decreases with increasing oligothiophene length. The maximum photovoltage is obtained for an intermediate oligothiophene length, providing an optimum between decreasing transport efficiency and increasing efficiency of charge separation and reduced recombination with increasing oligothiophene length. Holes transferred from nT-PDI to diamond persist there even after the illumination is switched off. Such features may be beneficial for application in solar cells.

Permanent Link: https://hdl.handle.net/11104/0334320