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Analysis of crystalline phases and integration modelling of charge quenching yields in hybrid lead halide perovskite solar cell materials
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry. Ulsan Natl Inst Sci & Technol, Sch Energy & Chem Engn, UNIST Gil 50, Ulsan, South Korea.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
Ecole Polytech Fed Lausanne, Lab Photomol Sci LSPM, CH-1015 Lausanne, Switzerland..
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2017 (English)In: Nano Energy, ISSN 2211-2855, E-ISSN 2211-3282, Vol. 40, 596-606 p.Article in journal (Refereed) Published
Abstract [en]

Organic inorganic metal halide perovskites (OIHPs) has emerged as promising photovoltaic materials the latest years. Many OIHPs, however, have complex material compositions with mixed cation and halide compositions, phase mixtures, as well as beneficial remains of PbI2 in the final solar cell materials where the complex material composition with dual conduction and valence band states and its effects on the performance remain unclear. Here, we report an approach to analyze the phase mixture, order-disorder phases and the emissive electronic states via a 4-state model of the photoluminescence yield. The approach is applied to scaffold layer perovskite materials with different mixed halide composition. The optical transitions and the full emission spectra are de-convoluted to quantify the band gaps and charge quenching yields in the OIHPs. An approach to extract the excited state coupling parameters within the 4-state model is also briefly given. The integration model is finally utilized in charge quenching yield analysis for the different materials and correlated with solar cell performance from MAPbI(3) and MAPbI(3-x)Cl(x) in mesoporous TiO2 layers where inclusion of Cl improves crystal formation and is compared to alternative approaches using optimized solvents and anti-solvent methods. A band gap grading effect was found to be present for the scaffold MAPbI(3) and increased for MAPbI(3-x)Cl(x), beneficial for decreased hole concentration at the back contact and thus reducing back contact recombination.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV , 2017. Vol. 40, 596-606 p.
Keyword [en]
Charge quenching yield, Photoluminescence, Band gap grading, Hybrid perovskite solar cells, Cl inclusion effect
National Category
Chemical Sciences Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-336442DOI: 10.1016/j.nanoen.2017.08.055ISI: 000411687800066OAI: oai:DiVA.org:uu-336442DiVA: diva2:1165924
Available from: 2017-12-14 Created: 2017-12-14 Last updated: 2017-12-15Bibliographically approved

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Zhang, XiaoliangJohansson, ErikBoschloo, GerritEdvinsson, Tomas

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