Abstract
Direct comparison between perovskite-structured hybrid organic-inorganic methylammonium lead bromide (MAPbBr3) and all-inorganic cesium lead bromide (CsPbBr3), allows identifying possible fundamental differences in their structural, thermal and electronic characteristics. Both materials possess a similar direct optical band gap, but CsPbBr3 demonstrates a higher thermal stability than MAPbBr3. In order to compare device properties, we fabricated solar cells, with similarly synthesized MAPbBr3 or CsPbBr3, over mesoporous titania scaffolds. Both cell types demonstrated comparable photovoltaic performances under AM1.5 illumination, reaching power conversion efficiencies of ∼6% with a poly aryl amine-based derivative as hole transport material. Further analysis shows that Cs-based devices are as efficient as, and more stable than methylammonium-based ones, after aging (storing the cells for 2 weeks in a dry (relative humidity 15-20%) air atmosphere in the dark) for 2 weeks, under constant illumination (at maximum power), and under electron beam irradiation.
Original language | English |
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Pages (from-to) | 167-172 |
Number of pages | 6 |
Journal | Journal of Physical Chemistry Letters |
Volume | 7 |
Issue number | 1 |
DOIs | |
State | Published - 7 Jan 2016 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2015 American Chemical Society.
Funding
This research work was supported by the Israel Ministry of Science’s Tashtiot, Israel−China and India−Israel programs, the Israel National Nanoinitiative, and the Sidney E. Frank Foundation through the Israel Science Foundation. D.C. holds the Sylvia and Rowland Schaefer Chair in Energy Research.
Funders | Funder number |
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Israel Ministry of Science’s Tashtiot | |
Israel National Nanoinitiative | |
Sidney E. Frank Foundation | |
Israel Science Foundation |
Keywords
- CsPbBr
- perovskite solar cells
- stability