AI Article Synopsis
- Hybrid organic/inorganic perovskites are gaining attention for their effectiveness in photovoltaics, highlighting the need to understand interfacial charge transfer processes to boost device efficiency.
- The study presents the first direct experimental evidence showing how the shape of perovskite nanocrystals (spheres, platelets, and cubes) significantly influences charge transfer dynamics when a molecular acceptor is present.
- Complexation at the nanocrystal surface enhances charge transfer dynamics and controls the reaction mechanism at the interface, suggesting new opportunities for advancing applications based on perovskite nanocrystals.
Article Abstract
Hybrid organic/inorganic perovskites have recently emerged as an important class of materials and have exhibited remarkable performance in photovoltaics. To further improve their device efficiency, an insightful understanding of the interfacial charge transfer (CT) process is required. Here, we report the first direct experimental observation of the tremendous effect that the shape of perovskite nanocrystals (NCs) has on interfacial CT in the presence of a molecular acceptor. A dramatic change in CT dynamics at the interfaces of three different NC shapes, spheres, platelets, and cubes, is recorded. Our results clearly demonstrate that the mechanism of CT is significantly affected by the NC shape. More importantly, the results demonstrate that complexation on the NC surface acts as an additional driving force not only to tune the CT dynamics but also to control the reaction mechanism at the interface. This observation opens a new venue for further developing perovskite NCs-based applications.
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| http://dx.doi.org/10.1021/acs.jpclett.6b01910 | DOI Listing |
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