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dc.contributor.authorShen, Yalong
dc.contributor.authorYin, Jun
dc.contributor.authorCai, Bo
dc.contributor.authorWang, Ziming
dc.contributor.authorDong, Yuhang
dc.contributor.authorXu, Xiaobao
dc.contributor.authorZeng, Haibo
dc.date.accessioned2020-03-04T07:57:06Z
dc.date.available2020-03-04T07:57:06Z
dc.date.issued2020
dc.date.submitted2019-10-30
dc.identifier.citationShen, Y., Yin, J., Cai, B., Wang, Z., Dong, Y., Xu, X., & Zeng, H. (2020). Lead-free, stable, high-efficiency (52%) blue luminescent FA3Bi2Br9 perovskite quantum dots. Nanoscale Horizons, 5(3), 580–585. doi:10.1039/c9nh00685k
dc.identifier.doi10.1039/c9nh00685k
dc.identifier.urihttp://hdl.handle.net/10754/661863
dc.description.abstractLead halide perovskites are promising candidates as next-generation emitting materials for lighting and displays due to their superior properties. However, the toxicity of lead content severely limits their practical applications. Although lead-free Sn-based and Bi-based perovskites (Cs3Bi2Br9, MA3Bi2Br9) are reported, they all suffer from low photoluminescence quantum yield (PLQY). Here, we report the synthesis of lead-free FA3Bi2Br9 perovskite quantum dots (QDs) and their optical characterization. Through a facile ligand-assisted solution process, the as-synthesized FA3Bi2Br9 QDs exhibit a bright blue emission at 437 nm with a high PLQY of 52%. As to the origins, the observed high exciton binding energy (274.6 meV), direct bandgap nature and low defect density are proposed to guarantee the exciton generation and efficient radiative recombination. Besides, the FA3Bi2Br9 QDs show a good air stability and ethanol stability. A lead-free perovskite blue light-emitting diodes (LED) was successfully fabricated by combining FA3Bi2Br9 QDs/PS composites with a UV light chip. Our results highlight the potential of lead-free perovskites for applications in light-emitting devices.
dc.description.sponsorshipThis work was financially supported by the Natural Science Foundation of Jiangsu Province (BK20180489), NSFC (61874054), Fundamental Research Funds for the Central Universities (30918011208). Most of the experiments were performed at the Materials Characterization Facility of Nanjing University of Science and Technology.
dc.publisherRoyal Society of Chemistry (RSC)
dc.relation.urlhttp://xlink.rsc.org/?DOI=C9NH00685K
dc.rightsArchived with thanks to Nanoscale horizons
dc.titleLead-free, stable, high-efficiency (52%) blue luminescent FA3Bi2Br9 perovskite quantum dots.
dc.typeArticle
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalNanoscale horizons
dc.eprint.versionPost-print
dc.contributor.institutionMIIT Key Laboratory of Advanced Display Materials and Devices, Institute of Optoelectronics & Nanomaterials, College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China.
kaust.personYin, Jun
dc.date.accepted2019-12-06
refterms.dateFOA2020-03-08T12:48:16Z


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