Lead halide residue as a source of light-induced reversible defects in hybrid perovskite layers and solar cells

0520317 - FZÚ 2020 RIV US eng J - Článek v odborném periodiku
Holovský, Jakub - Amalathas, A.P. - Landová, Lucie - Dzurňák, B. - Conrad, B. - Ledinský, Martin - Hájková, Zdeňka - Pop-Georgievski, Ognen - Svoboda, Jan - Yang, T.C.J. - Jeangros, Q.
Lead halide residue as a source of light-induced reversible defects in hybrid perovskite layers and solar cells.
ACS ENERGY LETTERS. Roč. 4, č. 12 (2019), s. 3011-3017. ISSN 2380-8195. E-ISSN 2380-8195
Grant CEP: GA ČR GJ17-26041Y
Grant ostatní: OPPK(XE) CZ.2.16/3.1.00/21545
Program: OPPK
Institucionální podpora: RVO:68378271 ; RVO:61389013
Klíčová slova: perovskite * X ray photoelectron spectroscopy * perovskite solar cells
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.); Polymer science (UMCH-V)
Impakt faktor: 19.003, rok: 2019
Způsob publikování: Omezený přístup
https://doi.org/10.1021/acsenergylett.9b02080

Advanced characterization methods avoiding transient effects in combination with solar cell performance monitoring reveal details of reversible light-induced perovskite degradation under vacuum. A clear signature of related deep defects in at least the 1 ppm range is observed by low absorptance photocurrent spectroscopy. An efficiency drop, together with deep defects, appears after minutes-long blue illumination and disappears after 1 h or more in the dark. Systematic comparison of perovskite materials prepared by different methods indicates that this behavior is caused by the lead halide residual phase inherently present in material prepared by the two-step method. X-ray photoelectron spectroscopy confirms that lead halide when illuminated decomposes into metallic lead and mobile iodine, which diffuses into the perovskite phase, likely producing interstitial defects. Single-step preparation, as well as preventing lead halide illumination, eliminates this effect.

Trvalý link: http://hdl.handle.net/11104/0305003