Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/142094
Title: Inducing panchromatic absorption and photoconductivity in polycrystalline molecular 1D lead-iodide perovskites through π-stacked viologens
Authors: Febriansyah, Benny
Koh, Teck Ming
John, Rohit Abraham
Ganguly, Rakesh
Li, Yongxin
Bruno, Annalisa
Mhaisalkar, Subodh Gautam
England, Jason
Keywords: Science::Chemistry::Inorganic chemistry
Science::Physics
Issue Date: 2018
Source: Febriansyah, B., Koh, T. M., John, R. A., Ganguly, R., Li, Y., Bruno, A., . . . England, J. (2018). Inducing panchromatic absorption and photoconductivity in polycrystalline molecular 1D lead-iodide perovskites through π-stacked viologens. Chemistry of Materials, 30(17), 5827-5830. doi:10.1021/acs.chemmater.8b02038
Journal: Chemistry of Materials
Abstract: As a consequence of their quantum- and electronically-confined inorganic lattices, molecular 1D lead-iodide perovskites are ill suited to photovoltaic (PV) applications. In order to circumvent these problems, we utilized electron accepting viologen (N,N′-dialkyl-4,4′-bipyridinium) dications incorporating hydrogen bond donor functionalities, which served to induce π–π stacking interactions. The resulting ‘viologen dimers’ display enhanced charge-transfer (CT) interactions with the 1D lead-iodide nanowires. This manifests in extended light absorption (up to 800 nm), reduced band gaps (1.74 eV to 1.77 eV), and longer photoluminescence lifetimes. More importantly, we demonstrate significant photoconductivity behavior in polycrystalline molecular 1D lead-iodide perovskites for the first time. Thus, this work offers a strategy for inducing the properties required for PV applications in molecular 1D lead-iodide perovskites.
URI: https://hdl.handle.net/10356/142094
ISSN: 0897-4756
DOI: 10.1021/acs.chemmater.8b02038
DOI (Related Dataset): https://doi.org/10.21979/N9/LNO3FF
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Chemistry of Materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.chemmater.8b02038
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:IGS Journal Articles

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