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“Edge stabilization in reduced-dimensional perovskites”. Quan LN, Ma D, Zhao Y, Voznyy O, Yuan H, Bladt E, Pan J, de Arquer FPG, Sabatini R, Piontkowski Z, Emwas A-H, Todorovic P, Quintero-Bermudez R, Walters G, Fan JZ, Liu M, Tan H, Saidaminov M I, Gao L, Li Y, Anjum DH, Wei N, Tang J, McCamant DW, Roeffaers MBJ, Bals S, Hofkens J, Bakr OM, Lu Z-H, Sargent EH, Nature Communications 11, 170 (2020). http://doi.org/10.1038/S41467-019-13944-2
Abstract: Reduced-dimensional perovskites are attractive light-emitting materials due to their efficient luminescence, color purity, tunable bandgap, and structural diversity. A major limitation in perovskite light-emitting diodes is their limited operational stability. Here we demonstrate that rapid photodegradation arises from edge-initiated photooxidation, wherein oxidative attack is powered by photogenerated and electrically-injected carriers that diffuse to the nanoplatelet edges and produce superoxide. We report an edge-stabilization strategy wherein phosphine oxides passivate unsaturated lead sites during perovskite crystallization. With this approach, we synthesize reduced-dimensional perovskites that exhibit 97 +/- 3% photoluminescence quantum yields and stabilities that exceed 300 h upon continuous illumination in an air ambient. We achieve green-emitting devices with a peak external quantum efficiency (EQE) of 14% at 1000 cd m(-2); their maximum luminance is 4.5 x 10(4) cd m(-2) (corresponding to an EQE of 5%); and, at 4000 cd m(-2), they achieve an operational half-lifetime of 3.5 h.
Keywords: A1 Journal article; Engineering sciences. Technology; Electron microscopy for materials research (EMAT)
Impact Factor: 16.6
Times cited: 147
DOI: 10.1038/S41467-019-13944-2
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“Single particle analysis of suspended matter in the Makasar Strait and Flores Sea with particular reference to tin-bearing particles”. Dekov VM, van Put A, Eisma D, Van Grieken R, Journal of sea research 41, 35 (1999). http://doi.org/10.1016/S1385-1101(98)00035-5
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1016/S1385-1101(98)00035-5
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“Electron microprobe analysis of suspended matter in the Angola Basin”. Bernard P, Eisma D, Van Grieken R, Journal of sea research 41, 19 (1999). http://doi.org/10.1016/S1385-1101(98)00043-4
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1016/S1385-1101(98)00043-4
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“Individual particle analysis of Western Mediterranean sediment cores, Rhône suspended matter and Sahara aerosols: investigation of inputs to the sediments”. Wegrzynek D, Jambers W, Van Grieken R, Eisma D, Marine chemistry 57, 25 (1997)
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Particle analysis of sediments from the Gulf of Lions, suspended matter from the Rhone river, and Sahara dust”. Wegrzynek D, Van Grieken R, Eisma D page 51 (1994).
Keywords: H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Individual particle analysis of sediments from the Gulf of Lions, suspensions from the Rhône river and dust of Saharan origin: preliminary results”. Wegrzynek D, Eisma D, Van Grieken R, (1992)
Keywords: P3 Proceeding; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Distribution and composition of suspended matter around Sumbawa Island, Indonesia”. Eisma D, van Put A, Van Grieken R, Mitteilungen aus dem Geologisch-Paläontologischen Institut der Universität Hamburg 70, 137 (1992)
Keywords: A3 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Dispersal of suspended matter in Makasar Strait and the Flores Basin”. Eisma D, Kalf J, Karmini M, Mook WG, Van Put A, Bernard P, Van Grieken R, Netherlands journal of sea research 24, 383 (1989). http://doi.org/10.1016/0077-7579(89)90116-6
Abstract: In November 1984 in Makasar and the Flores Basin water samples were collected (T, S, dissolved O2, total CO2), bottom samples (sediment composition) and suspended matter (particle composition, particle size). A sediment trap was moored in the Flores Basin at 4600 m depth for nearly four months, covering the dry season. In the Flores Basin there are indications for bottom flow resuspending bottom material or preventing suspended material from settling; in Makasar Strait there is probably inflow of deep water both from the south and from the north, resulting in a very slow bottom water flor. Bottom deposits in Makasar Strait and the Flores Basin are predominantly terrigenous, with an admixture of organic carbonate and silica (mostly coccoliths). Volcanic material is primarily present near to the volcanoes in the south and reaches the deeper basins by slumping. In the suspended matter no volcanic particles and little planktonic material were found, although the latter form 10 to 15% of the top sediment and of the material deposited in the sediment trap. In suspension particles with a large concentration of tin (Sn) were found associated mainly with iron. They probably come from northern Kalimantan or northern Sulawesi. Suspended matter concentrations were mainly less than 0.5 mg·dm−3, only off the Mahakam river mouth were concentrations higher than 1 mg·dm−3. Particle size was erratic because of the variable composition of the coarser particles in suspension. Organic matter concentrations in suspension (in mg·dm−3) roughly follow the distribution of total suspended matter but organic content (in %) of the suspended matter does not show any trends. All organic matter in suspension is of marine origin except in the Mahakam river and estuary. Deposition rates, as estimated from the sediment trap results, are 150 mg·cm−2·a−1 for the total sediment, 26 mg·cm−2·a−1 for carbonate and 13 mg·cm−2·a−1 for organic matter. Flocs and fibres in suspension were only found in and below the Mahakam river plume that reaches ca 400 km from the river mouth to the southeast, and in surface waters associated with plankton (diatoms). The formation of these flocs (broken-up macroflocs or marine snow) is primarily related to particle concentration, turbulence, and the presence of organisms that produce sticky material or glue particles together.
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1016/0077-7579(89)90116-6
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“Classification of estuarine particles using automated electron-microprobe analysis and multivariate techniques”. Bernard PC, Van Grieken RE, Eisma D, Environmental science and technology 20, 467 (1986). http://doi.org/10.1021/ES00147A005
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1021/ES00147A005
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“Characterisation of individual suspension particles in the Ems estuary”. Bernard PC, Van Grieken RE, Eisma D, (1986)
Keywords: P3 Proceeding; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Loss of particulate organic matter in estuaries as exemplified by the Ems and Gironde estuaries”. Eisma D, Bernard P, Boon JJ, Van Grieken R, Kalf J, Mook WG, Mitteilungen aus dem Geologisch-Paläontologischen Institut der Universität Hamburg 58, 397 (1985)
Keywords: A3 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Study of individual estuarine suspension particles by automated electron-probe X-ray microanalysis”. Bernard P, Van Grieken R, Eisma D, (1985)
Keywords: P3 Proceeding; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“The major-element composition of suspended matter in the Zaire river and estuary”. Sholkovitz ER, Van Grieken R, Eisma D, Netherlands journal of sea research 12, 407 (1978). http://doi.org/10.1016/0077-7579(78)90042-X
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1016/0077-7579(78)90042-X
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