Titlebar

Bibliografische Daten exportieren
Literatur vom gleichen Autor
plus auf ERef Bayreuth
plus bei Google Scholar

 

Formation criteria of high efficiency perovskite solar cells under ambient conditions

Titelangaben

Aranda, Clara ; Cristobal, Cesar ; Shooshtari, Leyla ; Li, Cheng ; Hüttner, Sven ; Guerrero, Antonio:
Formation criteria of high efficiency perovskite solar cells under ambient conditions.
In: Sustainable Energy & Fuels. Bd. 1 (2017) Heft 3 . - S. 540-547.
ISSN 2398-4902
DOI: 10.1039/C6SE00077K

Abstract

The field of lead halide perovskites for solar cell applications has recently reported an impressive power conversion efficiency (PCE) above 21 using complex mixed cation formulations. Very importantly, the highest PCE has been obtained using totally dry environmental conditions thereby increasing the processing costs (i.e. use of a glovebox). In this work devices processed in air under different ambient conditions are prepared with a PCE approaching 19 for the simplest lead halide perovskite (MAPbI3, MA = methyl ammonium). It is shown that the PbI2 : MAI : additive complex needs to be generated in the correct stoichiometry where additives are any highly polar molecules that are able to stabilize the complex (i.e. H2O or dimethylsulphoxide (DMSO)). Under high humidity conditions H2O is incorporated into the complex and only small concentrations of further additives are needed. Precursor formulations not adequately balanced for the humidity conditions lead to films with poor morphology as evidenced by SEM. These films show negative multiiodide plumbate chemical defects as observed by absorbance measurements. These chemical defects act as recombination centers thereby reducing the photocurrent and fill factor in photovoltaic devices. In addition, the undesirable high conductivity of the perovskite hydrates (sigma = 8 times 10-1 Scm-1){,} up to seven orders of magnitude higher than the pure MAPbI3{,} is shown{,} indicating that the presence of hydrates may act as shunting pathways that can significantly reduce the open circuit potential.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Juniorprofessur Solarenergie > Juniorprofessur Solarenergie - Juniorprof. Dr. Sven Hüttner
Profilfelder > Advanced Fields > Polymer- und Kolloidforschung
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Juniorprofessur Solarenergie
Profilfelder
Profilfelder > Advanced Fields
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 530 Physik
500 Naturwissenschaften und Mathematik > 540 Chemie
Eingestellt am: 04 Sep 2017 12:58
Letzte Änderung: 04 Sep 2017 12:58
URI: https://eref.uni-bayreuth.de/id/eprint/39259