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Inorganic Colloidal Perovskite Quantum Dots for Robust Solar CO2 Reduction
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2017 (English)In: Chemistry - A European Journal, ISSN 0947-6539, E-ISSN 1521-3765, Vol. 23, no 40, 9481-9485 p.Article in journal (Refereed) Published
Abstract [en]

Inorganic perovskite quantum dots as optoelectronic materials have attracted enormous attention in light-harvesting and emitting devices. However, photocatalytic conversion based on inorganic perovskite halides has not been reported. Here, we have synthesized colloidal quantum dots (QDs, 3-12 nm) of cesium lead halide perovskites (CsPbBr3) as a new type of photocatalytic material. The band gap energies and photoluminescence (PL) spectra are tunable over the visible spectral region according to quantum size effects on an atomic scale. The increased carrier lifetime revealed by time-resolved PL spectra, indicates the efficient electron-hole separation and transfer. As expected, the CsPbBr3 QDs with high selectivity of greater than 99% achieve an efficient yield of 20.9 mmolg(-1) towards solar CO2 reduction. This work has opened a new avenue for inorganic colloidal perovskite materials as efficient photocatalysts to convert CO2 into valuable fuels.

Place, publisher, year, edition, pages
Wiley-VCH Verlagsgesellschaft, 2017. Vol. 23, no 40, 9481-9485 p.
Keyword [en]
CO2 reduction, colloidal quantum dots, perovskite, photocatalysis, solar fuels
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-211603DOI: 10.1002/chem.201702237ISI: 000405695400008Scopus ID: 2-s2.0-85021251636OAI: oai:DiVA.org:kth-211603DiVA: diva2:1131386
Funder
Swedish Energy AgencyKnut and Alice Wallenberg Foundation
Note

QC 20170814

Available from: 2017-08-14 Created: 2017-08-14 Last updated: 2017-08-14Bibliographically approved

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Sun, Licheng

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