DataVXChemistry of MaterialsPaper
journal article·2018-09-11Open access

Inducing Panchromatic Absorption and Photoconductivity in Polycrystalline Molecular 1D Lead-Iodide Perovskites through π-Stacked Viologens

Benny Febriansyah, Teck Ming Koh, Rohit Abraham John, Rakesh Ganguly, Yongxin Li, Annalisa Bruno, Subodh G. Mhaisalkar, Jason England

Chemistry of Materials· Volume 30· Issue 17
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Source abstract

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.
Source: openalex_inverted_index · Quality: baseline

Research context

NanomaterialsElectronic materials

OpenAlex topics: Perovskite Materials and Applications · Chalcogenide Semiconductor Thin Films · Electronic and Structural Properties of Oxides

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

Affiliations

Energy Research Institute at Nanyang Technological University (ERI@N), Research Techno Plaza, X-Frontier Block Level 5, 50 Nanyang Drive, Singapore 637553, Singapore

Interdiscipinary Graduate School (IGS), Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore

Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore

School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore

Funding

Ministry of Education - Singapore · National Research Foundation Singapore · Office of Naval Research Global · Nanyang Technological University

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