Elucidating the role of TiCl.sub.4./sub. post-treatment on percolation of TiO.sub.2./sub. electron transport layer in perovskite solar cells

0538351 - FZÚ 2021 RIV GB eng J - Journal Article
Amalathas, A.P. - Landová, Lucie - Huminiuc, T. - Horák, L. - Conrad, B. - Polcar, T. - Holovský, Jakub
Elucidating the role of TiCl₄ post-treatment on percolation of TiO₂ electron transport layer in perovskite solar cells.
Journal of Physics D-Applied Physics. Roč. 53, č. 38 (2020), s. 1-11, č. článku 385501. ISSN 0022-3727. E-ISSN 1361-6463
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA ČR GA18-24268S
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : hybrid perovskites, * solar cells, * titanium oxide
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.207, year: 2020
Method of publishing: Limited access
https://doi.org/10.1088/1361-6463/ab938c

The ideal electron transport layer of a high performance perovskite solar cell should have good optical transparency, high electron mobility, and an energy level alignment well-matched with the perovskite material. In this work, we investigate the role of TiCl(4)post-treatment of the mesoporous TiO(2)electron transport layer by varying the concentration of TiCl(4)and characterizing optical and electrical properties, charge carrier dynamics, and photovoltaic performance of mesoscopic CH(3)NH(3)PbI(3)solar cells. It is found that the TiCl(4)treatment provides an additional interconnection between the TiO(2)particles, leading to better percolation as evident from high resolution cross-section images and chemical maps. This enhances effective electron mobility in the material as well as significantly reduces average sub-bandgap absorption due to defects and electronic disorder determined by photothermal deflection spectroscopy.

Permanent Link: http://hdl.handle.net/11104/0316161