35 research outputs found
Synthesis, crystal structure, thermal and nonlinear optical properties of new metal-organic single crystal: Tetrabromo (piperazinium) zincate (II) (TBPZ)
No full textPhotovoltaic Performance of Vapor-Assisted Solution-Processed Layer Polymorph of Cs<sub>3</sub>Sb<sub>2</sub>I<sub>9</sub>
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Thiocyanate-Treated Perovskite-Nanocrystal-Based Light-Emitting Diodes with Insight in Efficiency Roll-Off
No full textLight emitting diodes (LED) based on halide perovskite nanocrystals (NC) have received widespread attention in recent years. In particular, LEDs based on CsPbBr3 NCs were the object of special interest. Here, we report for the first time green LED based on CsPbBr3 NCs treated with ammonium thiocyanate solution before purification with polar solvent. The champion device fabricated based on the treated CsPbBr3 NCs showed high efficiency and high stability during operation as well as during storage. A study on morphology and current distribution of NC films under applied voltages was carried out by conductive atomic force microscopy, giving a hint on efficiency roll-off. The current work provides a facile way to treat sensitive perovskite NCs and to fabricate perovskite NC-based LED with high stability. Moreover, the results shed new light on the relation between film morphology and device performance and on the possible mechanism of efficiency roll-off in NC LED
An insight into the electrochemical activity of Al-doped V2O3
No full textWe design Al-doped V2O3 (AlxV2O3) compounds as cathodes of aluminium battery. A citric acid-assisted simple solid-state synthesis is used to produce AlxV2O3 compounds by heating, at different temperature, a reaction mixture of NH4VO3, Al(NO3)3centerdot9H2O and citric acid under Ar flow. Al-doping in-between layers and at lattice sites of V2O3 is confirmed by structural, vibrational and chemical analyses. The doped compounds obtained at 600 °C and 800 °C are confirmed as Al0.56V2O3 and Al0.53V2O3 corresponding to theoretical capacities 488 and 490 mAh g−1, respectively, for the extraction of doped Al by considering three electron transfer (Al/Al3+). The as-synthesized AlxV2O3 compounds are tested as cathodes in aluminium battery with 1.0 M AlCl3:[EMIM]Cl electrolyte. The electrodes of Al0.56V2O3 and Al0.53V2O3 exhibited the first charge capacity of 415 and 385 mAh g−1, respectively. The electrochemical extraction of doped Al is confirmed by comparisons with bare V2O3 control cathodes and post-cycling structural studies. The extraction of doped Al from AlxV2O3 indicates its promising use in high capacity cathode for Al-ion battery.NRF (Natl Research Foundation, S’pore)Published versio
A dual-functional additive improves the performance of molecular bulk heterojunction photovoltaic cells
No full text[[sponsorship]]應用科學研究中心[[note]]已出版;[SCI];有審查制度;具代表性[[note]]http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Drexel&SrcApp=hagerty_opac&KeyRecord=2046-2069&DestApp=JCR&RQ=IF_CAT_BOXPLO
Using an Airbrush Pen for Layer-by-Layer Growth of Continuous Perovskite Thin Films for Hybrid Solar Cells
No full textInfluence of In doping on the thermoelectric properties of AgSbTe2 compound with enhanced figure of merit
No full text[[sponsorship]]物理研究所[[note]]已出版;有審查制度;具代表性[[note]]http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Drexel&SrcApp=hagerty_opac&KeyRecord=0959-9428&DestApp=JCR&RQ=IF_CAT_BOXPLO
