DataVXAdvanced Materials InterfacesPaper
journal article·2025-06Open access

Direct Evidence of the Presence of Hybrid Charge Transfer State in a Perovskite Nanocrystal‐Polythiophene Blend Solid State Film

Tersilla Virgili, Mariacecilia Pasini, Michele Guizzardi, Edoardo Mosconi, Stefania Milanese, Luca Gregori, Asma A. Alothman, Maria Luisa De Giorgi, Arianna Creti, Maryna Bodnarchuk, Mauro Lomascolo, Marco Anni

Advanced Materials Interfaces· Volume 12· Issue 11
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Abstract

Abstract In this paper, the photophysical properties of a hybrid material, composed of a conjugated polymer and perovskite nanocrystals, are investigated by ultrafast spectroscopy and morphological characterization. The relaxation dynamics of a drop‐casted film from the semiconducting polythiophene (P3HT) and a green‐emitting CsPbBr3 (zwitterionic sulfobetaine ‐capped) perovskite nanocrystals (NCs) solution is studied. The transient spectroscopy presents a very long photobleaching signal peaked at 516 nm not present in the single components of the blend. The scanning electron and confocal fluorescence microscopy images show that the P3HT and the CsPbBr3 NCs are finely mixed in the film. The presence of a very efficient hole transfer from the nanocrystal to the polymeric chain that induces the formation of a long ‐lived charge‐transfer state as shown in the pump‐probe measurements is proposed. The theoretical model reveals the important role of the zwitterionic sulfobetaine capper in this process. The perovskite strongly adsorbs the surfactant, while the polythiophene chain is not directly bound to the perovskite. Instead, it interacts with the surfactant itself, contributing to the electronic properties of the overall system.
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Research context

PolymersNanomaterialsElectronic materials

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Solid-state spectroscopy and crystallography

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

Affiliations

Istituto di Fotonica e Nanotecnologie – Consiglio Nazionale delle Ricerche (CNR) Piazza Leonardo da Vinci 32 Milano 20133 Italy

Istituto di Scienze e Tecnologie Chimiche “Giulio Natta”— SCITEC—CNR via Corti 12 Milano 20133 Italy

Dipartimento di Fisica Politecnico di Milano Piazza Leonardo da Vinci 32 Milano 20133 Italy

Computational Laboratory for Hybrid and Organic Photovoltaics – Istituto CNR di Scienze e Tecnologie Chimiche SCITEC‐CNR Via Elce di Sotto 8 Perugia 06123 Italy

Chemistry Department College of science King Saud University Riyadh 11451 Saudi Arabia

Dipartimento di Matematica e Fisica " Ennio De Giorgi" Università del Salento Via per Arnesano Lecce 73100 Italy

Department of Chemistry, Biology and Biotecnology University of Perugia and INSTM Via Elce di Sotto 8 Perugia 06123 Italy

CNR‐IMM Institute for Microelectronic and Microsystems Unit of Lecce Via per Monteroni Lecce 73100 Italy

Laboratory for Thin Films and Photovoltaics Empa − Swiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129 Dübendorf CH‐8600 Switzerland

Institute of Inorganic Chemistry Department of Chemistry and Applied Bioscience ETH Zürich Vladimir Prelog Weg 1 Zürich CH‐8093 Switzerland

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