01693nas a2200193   4500008004100000022001400041245015300055210006900208260011000277300001600387490000600403520084100409100002401250700002401274700002001298700002401318700002501342856013201367       2014                        eng d  a2046-206900aNanophase CulnS(2) nanosheets/CuS composite grown by the SILAR method leads to high performance as a counter electrode in dye sensitized solar cells0 aNanophase CulnS2 nanosheetsCuS composite grown by the SILAR meth  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcMAY  a21989-219960 v43 a<p>Single phase CulnS(2) (CIS) nanosheets are synthesized on TiO2 coated FTO by the simple technique of Successive Ionic Layer Adsorption Reaction (SILAR) followed by annealing at 500 degrees C. Annealing at a lower temperature of 250 degrees C is found to yield CuS nanoparticles in addition to the CIS phase. Both single phase CIS and the CuS/CIS nanocomposite were examined as counter electrodes for a dye-sensitized solar cell (DSSC). The CIS-CuS composite is found to have a synergistic effect on the catalytic performance toward the reduction of tri-iodide, yielding a power conversion efficiency of 6.3% as compared to pristine CIS (5%) or CuS (3.5%). The possible reasons behind the high performance of the composite are elucidated using cyclic voltammetry (CV) measurements and electrochemical impedance spectroscopy (EIS).</p>1 aBhosale, Reshma, K.1 aAgarkar, Shruti, A.1 aAgrawal, Ishita1 aNaphade, Rounak, A.1 aOgale, Satishchandra  uhttps://library.ncl.res.in/content/nanophase-culns2-nanosheetscus-composite-grown-silar-method-leads-high-performance-counter-002068nas a2200193   4500008004100000022001400041245010300055210006900158260000800227300001200235490000600247520137700253100002401630700002401654700001901678700002001697700002501717856013201742       2014                        eng d  a2050-748800aPlasmonic light harvesting of dye sensitized solar cells by Au-nanoparticle loaded TiO2 nanofibers0 aPlasmonic light harvesting of dye sensitized solar cells by Auna  cFEB  a975-9840 v23 a<p>We report a significant enhancement in the performance of dye sensitized solar cells by using in situ Au nanoparticle (Au NP) loaded TiO2 nanofibers (Au: TiO2 NFs) as the light harvesting (LH) layer as compared to the use of only TiO2 nanofibers (NFs) as the LH layer. The Au NP: TiO2 nanofibers are prepared by electro-spinning of a precursor mixture whereby nanostructured porous TiO2 nanofibers are formed and get in situ loaded with only 4-5 nm AuNPs. The as-synthesized nanofibers are characterized by X-ray diffraction, Raman, photoluminescence (PL) and Mott-Schottky analyses. The presence of gold nanoparticles shows considerable improvements in light harvesting and the electrochemical properties of TiO2 nanofibers. A remarkable enhancement in the efficiency by 25% is achieved with the AuNF LH layer as compared to 12% with the NF layer, over the value without any light harvesting layer. The IPCE and impedance analyses reveal commensurate improvements. The impedance study shows a decrease in the transport resistance (R-TiO2) and an increment in the chemical capacitance and life time of the solar cell. Systematic analyses of the optical properties suggest that the enhanced light harvesting by Au NP loaded TiO2 nanofibers is caused by the role of plasmon-polariton modes at the distributed nanoscale Schottky junctions in the Au: TiO2 nanofibers.</p>
1 aNaphade, Rounak, A.1 aTathavadekar, Mukta1 aJog, Jyoti, P.1 aAgarkar, Shruti1 aOgale, Satishchandra  uhttps://library.ncl.res.in/content/plasmonic-light-harvesting-dye-sensitized-solar-cells-au-nanoparticle-loaded-tio2-nanofibers01505nas a2200253   4500008004100000022001400041245010000055210006900155260008100224300001100305490000700316520057200323653001100895653001900906653001500925100002400940700002800964700002400992700002801016700002301044700002501067700002901092856013001121       2016                        eng d  a0022-372700aSynthesis, microstructure, optical and field emission studies of iron vanadium oxide nanosheets0 aSynthesis microstructure optical and field emission studies of i  aTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLANDbIOP PUBLISHING LTDcAPR  a1453010 v493 a<p>We report a single step growth of thin graphene-like, densely packed FeV3O8 (FVO) nanosheets on silicon substrates via facile hydrothermal synthesis. These nanosheets have dimensions of a few microns with thin edges, offering very high aspect ratio. These FVO nanosheets exhibit excellent field emission behaviour with low turn on and threshold voltages of 1.3 V mu m(-1) and 1.7 V mu m(-1), respectively. The corresponding emitter delivers high emission current density of (similar to 1.650 mA cm(-2)) at fairly low applied field (similar to 4.00 V mu m(-1)).</p>10aFeV3O810afield emission10ananosheets1 aBadadhe, Satish, S.1 aSuryawanshi, Sachin, R.1 aNaphade, Rounak, A.1 aChaudhary, Minakshi, V.1 aMore, Mahendra, A.1 aShelke, Manjusha, V.1 aOgale, Satishchandra, B.  uhttps://library.ncl.res.in/content/synthesis-microstructure-optical-and-field-emission-studies-iron-vanadium-oxide-nanosheets01788nas a2200193   4500008004100000245017200041210006900213260000800282520098400290100002401274700001701298700002601315700001901341700002701360700002401387700002201411700002901433856013201462       2017                        eng d00aHigh quality hybrid perovskite semiconductor thin films with remarkably enhanced luminescence and defect suppression via quaternary alkyl ammonium salt based treatment0 aHigh quality hybrid perovskite semiconductor thin films with rem  cJUL3 aSignificant enhancement in the luminescence and superior photophysical properties of CH3NH3PbBr3 thin films prepared via simple single step spin coating process involving a novel additive mediated solvent extraction step is reported. This process results in significantly lower disorder in CH3NH3PbBr3 perovskites with Urbach energies reducing from ≈35 to ≈17 meV, which is the lowest reported value to date. The additive mediated process also results in a remarkable improvement in the photoluminescence quantum yields (PLQYs) from 1% to 30%. Coupled with the overall increase in surface roughness, a significant increase in the internal PLQY from 7% to 77% is estimated, indicating the superior quality of the treated thin films. The resultant high quality CH3NH3PbBr3 perovskites with remarkable photophysical properties can be used in realizing highly efficient optoelectronic devices. Highly efficient light emitting diodes using these perovskites are demonstrated here.1 aNaphade, Rounak, A.1 aZhao, Baodan1 aRichter, Johannes, M.1 aBooker, Edward1 aKrishnamurthy, Shrreya1 aFriend, Richard, H.1 aSadhanala, Aditya1 aOgale, Satishchandra, B.  uhttps://library.ncl.res.in/content/high-quality-hybrid-perovskite-semiconductor-thin-films-remarkably-enhanced-luminescence-and