journal article·2023Open access

Surface and optical properties of phase-pure silver iodobismuthate nanocrystals

Anastasia Matuhina, G. Krishnamurthy Grandhi, Ashanti Bergonzoni, Laurent Pedesseau, Roberto Grisorio, Shambhavee Annurakshita, Harri Ali-Löytty, Riya Varghese, Kimmo Lahtonen, George Volonakis, Vincenzo Pecunia, Godofredo Bautista, Jacky Even, Paola Vivo

Nanoscale· Volume 15· Issue 36

Abstract

The study of surface defects is one of the forefronts of halide perovskite research. In the nanoscale regime, where the surface-to-volume ratio is high, the surface plays a key role in determining the electronic properties of perovskites. Perovskite-inspired silver iodobismuthates are promising photovoltaic absorbers. Herein, we demonstrate the colloidal synthesis of phase pure and highly crystalline AgBiI4 nanocrystals (NCs). Surface-sensitive spectroscopic techniques reveal the rich surface features of the NCs that enable their impressive long-term environmental and thermal stabilities. Notably, the surface termination and its passivation effects on the electronic properties of AgBiI4 are investigated. Our atomistic simulations suggest that a bismuth iodide-rich surface, as in the case of AgBiI4 NCs, does not introduce surface trap states within the band gap region of AgBiI4, unlike a silver iodide-rich surface. These findings may encourage the investigation of surfaces of other lead-free perovskite-inspired materials.
Source: europepmc · Quality: candidate unverified · Source record ↗

Research context

OpenAlex topics: Perovskite Materials and Applications · Optical properties and cooling technologies in crystalline materials · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Hybrid Solar Cells, Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 541, FI-33014 Tampere, Finland

Univ Rennes, INSA Rennes, CNRS, Institut FOTON – UMR 6082, F-35000 Rennes, France

Dipartimento di Ingegneria Civile, Ambientale, del Territorio, Edile e di Chimica (DICATECh), Politecnico di Bari, Via Orabona 4, 70125 Bari, Italy

Photonics Laboratory, Physics Unit, Faculty of Engineering and Natural Sciences, Tampere University, FI-33014 Tampere, Finland

Surface Science Group, Photonics Laboratory, Tampere University, P.O. Box 692, FI-33014 Tampere, Finland

Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 692, Tampere FI-33014, Finland

Univ Rennes, ENSCR, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35700 Rennes, France

School of Sustainable Energy Engineering, Simon Fraser University, 5118–10285 University Drive, Surrey, British Columbia V3T 0N1, Canada

Funding

Jane ja Aatos Erkon Säätiö · Jenny ja Antti Wihurin Rahasto · Tekniikan Edistämissäätiö · Institut Universitaire de France · Horizon 2020 Framework Programme · Luonnontieteiden ja Tekniikan Tutkimuksen Toimikunta

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