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Inorganic Ions Assisted the Anisotropic Growth of CsPbCl3 Nanowires with Surface Passivation Effect
Tech Univ Denmark, Dept Chem, DK-2800 Kongens Lyngby, Denmark.
Tech Univ Denmark, Dept Chem, DK-2800 Kongens Lyngby, Denmark.
Lund Univ, Dept Chem Phys & NanoLund, Box 124, S-22100 Lund, Sweden.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry. South Valley Univ, Qena Fac Sci, Dept Chem, Qena 83523, Egypt.
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2018 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 10, no 35, p. 29574-29582Article in journal (Refereed) Published
Abstract [en]

All-inorganic halide perovskite nanowires (NWs) exhibit improved thermal and hydrolysis stability and could thus play a vital role in nanoscale optoelectronics. Among them, blue-light-based devices are extremely limited because of the lack of a facile method to obtain high-purity CsPbCl3 NWs. Herein, we report a direct and facile method for the synthesis of CsPbCl3 NWs assisted by inorganic ions that served both as a morphology controlling agent for the anisotropic growth of nanomaterials and a surface passivation species modulating the surface of nanomaterials. This new approach allows us to obtain high-purity and size-uniform NWs as long as 500 nm in length and 20 nm in diameter with high reproducibility. X-ray photoelectron spectroscopy and ultrafast spectroscopic measurements confirmed that a reduced band gap caused by the surface species of NWs relative to nanocubes (NCs) was achieved at the photon energy of 160 eV because of the hybrid surface passivation contributed by adsorbed inorganic ions. The resulting NWs demonstrate significantly enhanced photoelectrochemical performances, 3.5-fold increase in the photocurrent generation, and notably improved stability compared to their NC counterparts. Our results suggest that the newly designed NWs could be a promising material for the development of nanoscale optoelectronic devices.

Place, publisher, year, edition, pages
2018. Vol. 10, no 35, p. 29574-29582
Keywords [en]
inorganic halide perovskite, CsPbCl3 nanowires, surface passivation, photoelectrochemical cell, electron and hole injection, ultrafast spectroscopy
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-365656DOI: 10.1021/acsami.8b09113ISI: 000444355700038PubMedID: 30088920OAI: oai:DiVA.org:uu-365656DiVA, id: diva2:1263811
Funder
Swedish Research Council, 2017-05337Available from: 2018-11-16 Created: 2018-11-16 Last updated: 2018-11-16Bibliographically approved

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Hammarström, LeifSá, Jacinto

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