Sublimed C.sub.60./sub. for efficient and repeatable perovskite-based solar cells

0583023 - FZÚ 2025 RIV US eng J - Journal Article
Said, A.A. - Aydin, E. - Ugur, E. - Xu, Z. - Deger, C. - Vishal, B. - Vlk, Aleš - Dally, P. - Yildirim, B.K. - Azmi, R. - Liu, J. - Jackson, E.A. - Johnson, H.M. - Gui, M. - Richter, H. - Pininti, A.R. - Bristow, H. - Babics, M. - Razzaq, A. - Allen, T.G. - Ledinský, Martin - Yavuz, I. - Rand, B.P. - De Wolf, S.
Sublimed C₆₀ for efficient and repeatable perovskite-based solar cells.
Nature Communications. Roč. 15, č. 1 (2024), č. článku 708. E-ISSN 2041-1723
R&D Projects: GA MŠMT(CZ) LUASK22202; GA MŠMT LM2018110
Institutional support: RVO:68378271
Keywords : fullerene * perovskite solar cells * perovskite-silicon tandem solar cell
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 16.6, year: 2022
Method of publishing: Open access

Thermally evaporated C60 is a near-ubiquitous electron transport layer in state-of-the-art p–i–n perovskite-based solar cells. As perovskite photovoltaic technologies are moving toward industrialization, batch-to-batch reproducibility of device performances becomes crucial. Here, we show that commercial as-received (99.75% pure) C60 source materials may coalesce during repeated thermal evaporation processes, jeopardizing such reproducibility. We find that the coalescence is due to oxygen present in the initial source powder and leads to the formation of deep states within the perovskite bandgap, resulting in a systematic decrease in solar cell performance. However, further purification (through sublimation) of the C60 to 99.95% before evaporation is found to hinder coalescence, with the associated solar cell performances being fully reproducible after repeated processing.
Permanent Link: https://hdl.handle.net/11104/0352940