02280nas a2200241 4500008004100000022001400041245013700055210006900192260010600261300001200367490000800379520132200387653002801709653002201737653000901759653002101768100002401789700002201813700002401835700002501859700002501884856012901909 2014 eng d a0013-468600aElectronically and catalytically functional carbon cloth as a permeable and flexible counter electrode for dye sensitized solar cell0 aElectronically and catalytically functional carbon cloth as a pe aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcMAR a248-2530 v1233 a

In this work we demonstrate that a conducting carbon cloth obtained by one-step pyrolysis of easily available cellulose fabric competes favorably with the commonly employed expensive platinum/FTO system as a counter electrode for dye sensitized solar cell (DSSC). In view of the low carbonization temperature (1000 degrees C) which forbids full graphitization, the nature of carbon in this case is represented by topologically randomly assembled nanoscale graphene units (turbostratic carbon). This morphology has high density of edge states and oxygen containing surface groups rendering multitude of catalytic sites for the reduction of I-3(-). Moreover the cloth is permeable to the dye and/or liquid electrolyte and its absorption properties also help retain the electrolyte. A fairly high efficiency of 5.8% is achieved using such cloth as a counter electrode as against 7% with the conventional Pt/FTO system. Moreover, the permeable property of the cloth eliminates a complete step of drilling hard TCO substrates for final dispensing of electrolyte into the device and the sealing process is also facile. In fact even the dye can be dispensed through the cloth. Finally, the flexibility of the carbon cloth can adapt easily to flexible/wearable DSSC designs. (C) 2014 Elsevier Ltd. All rights reserved.

10aconducting carbon cloth10acounter electrode10aDSSC10awithout drilling1 aTathavadekar, Mukta1 aBiswal, Mandakini1 aAgarkar, Shruti, A.1 aGiribabu, Lingamallu1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/electronically-and-catalytically-functional-carbon-cloth-permeable-and-flexible-counter-002001nas a2200265 4500008004100000022001400041245008700055210006900142260007100211300001400282490000600296520106100302653003101363653001601394653002001410100002301430700001801453700002401471700002201495700002401517700002001541700002901561700002501590856012001615 2014 eng d a2168-048500aFunctionally engineered egg albumen gel for quasi-solid dye sensitized solar cells0 aFunctionally engineered egg albumen gel for quasisolid dye sensi a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcDEC a2707-27140 v23 a

In this report, we demonstrated an interesting application of a bioderived material for the dye sensitized solar cells (DSSCs). Egg white, the clear liquid in a hen's egg, which possesses a remarkable gelling/cross-linking ability, was applied in the form of a gel electrolyte in a DSSC architecture to enhance its durability. A hybrid gel composed of poly(acrylic acid), polyaniline and egg albumen was synthesized, and the cell efficiency, stability and durability of the corresponding DSSC device were studied in detail. The dye sensitized solar cell with the egg albumen based electrolyte demonstrated a conversion energy efficiency of 4.6%. Further, a chemically modified egg albumen with ethylenediaminetetraacetic dianhydride showed improved cross-linking, microstructural and conductivity properties of the gel, and yielded a remarkable 5.75% conversion efficiency. Electrochemical impedance spectroscopy data showed favorable characteristics for charge transport through the modified gel and supported the efficiency observations very well.

10adye sensitized solar cells10aEgg albumen10agel electrolyte1 aKelkar, Sarika, A.1 aPandey, Komal1 aAgarkar, Shruti, A.1 aSaikhedkar, Nidhi1 aTathavadekar, Mukta1 aAgrawal, Ishita1 aGundloori, Rathna, V. N.1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/functionally-engineered-egg-albumen-gel-quasi-solid-dye-sensitized-solar-cells-001445nas a2200217 4500008004100000022001400041245013000055210006900185260011000254300001400364490000600378520054900384100002000933700002600953700002100979700002401000700002301024700002401047700002901071856012701100 2014 eng d a2046-206900aNickel cobalt sulfide nanoneedle array as an effective alternative to pt as a counter electrode in dye sensitized solar cells0 aNickel cobalt sulfide nanoneedle array as an effective alternati aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcNOV a8289-82940 v43 a

Self supported nickel cobalt sulfide (NCS) nanoneedles are directly formed on FTO glass substrates by sulphurization of nickel cobalt oxide nanoneedles (grown by a hydrothermal method) in the presence of a hydrogen sulfide and argon gas mixture. These NCS nanoneedles when used as a counter electrode for dye sensitized solar cells (DSSCs) show efficient catalytic activity towards the I-/I-3(-) redox couple, and lead to an impressive efficiency of 6.9%, compared with 7.7% obtained with a Pt electrode in similarly constructed devices.

1 aBanerjee, Abhik1 aUpadhyay, Kush, Kumar1 aBhatnagar, Sumit1 aTathavadekar, Mukta1 aBansode, Umesh, P.1 aAgarkar, Shruti, A.1 aOgale, Satishchandra, B. uhttps://library.ncl.res.in/content/nickel-cobalt-sulfide-nanoneedle-array-effective-alternative-pt-counter-electrode-dye-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

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.

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-nanofibers02146nas a2200169 4500008004100000245011600041210006900157260000800226300001600234490000700250520149400257100002501751700002401776700002301800700002101823856013201844 2016 eng d00aModified photo-electrochemical and photo-voltaic properties of solvothermally crystallised TiO2 nanotube arrays0 aModified photoelectrochemical and photovoltaic properties of sol cDEC a12427-124370 v273 aTiO2 nanotube arrays formed by electrochemical anodization of Ti metal foil are crystallized through a solvothermal technique at 200 A degrees C (as compared to conventional annealing at 550 A degrees C), which results in anatase phase with granular morphology. The photo-current measurements reveal a higher current-density under the visible light for solvothermally crystallized samples. The photo-current behavior has been analysed and correlated with defect state characterization using X-ray photo-electron spectroscopy, Photo-luminescence, Electron paramagnetic resonance and Mott-Schottky measurements. These studies indicate an oxygen vacancy related defect state at 1.14 eV below the conduction band. Also, the density of defect states in solvothermally crystallised samples is an order of magnite, the photo-voltaic properties are studied through dye-sensitised solar cells. I-Vude higher than that in conventionally annealed samples. Furthermor characteristics of DSSC fabricated with solvothermally crystallised samples show comparable efficiency but higher dye-adsorption with respect to the conventionally annealed samples. Such a comparable efficiency at a lower thermal budget leads to reduced 'energy pay-back time' in solar cells fabricated with solvothermally crystallised TiO2 nanotube arrays. Finally, we demonstrate a proof-of-concept design of flexible solar cell based on TiO2 nanotubes grown on Kapton substrate and crystallised through the solvothermal technique.1 aBanki, Manmadha, Rao1 aTathavadekar, Mukta1 aChunchu, Venkatrao1 aRoy, Somnath, C. uhttps://library.ncl.res.in/content/modified-photo-electrochemical-and-photo-voltaic-properties-solvothermally-crystallised-tio202279nas a2200361 4500008004100000022001400041245009100055210006900146260000800215490000600223520110800229653001501337653002901352653001601381653005301397653001901450653002401469653003501493653000701528653002601535653001601561100002401577700002701601700002101628700002101649700001801670700002201688700001701710700002301727700002301750700002501773856011901798 2017 eng d a2050-748800aLow-dimensional hybrid perovskites as high performance anodes for alkali-ion batteries0 aLowdimensional hybrid perovskites as high performance anodes for cSEP0 v53 a

State-of-the-art Li (or Na) ion batteries work by insertion/extraction of the alkali metal ions into a porous electrode material, where the overall capacity is strongly dependent on the accessibility of the host material interior to the ions. On the other hand, the performance stability depends on various factors governed by the specific constitution of the electrode. Here we show that molecularly engineered low-dimensional hybrid perovskites can work as excellent anode materials for alkali-ion batteries. We measure a high reversible capacity of 646 mA h g(-1) at 100 mA g(-1) with good stability tested up to 250 cycles for the benzidine mediated lead iodide based 1D system. An ex situ analysis of the electrodes reveals that the storage primarily occurs via the Li-x(or Na-x)Pb alloying/de-alloying process. We anticipate that these results open a new direction for the use of low-dimensional hybrid perovskites for energy storage applications.

10aGeneration10aInorganic-Organic Hybrid10aLead Iodide10alithiation-intramolecular electrophilic reaction10aNa-Air Battery10aNegative Electrodes10aOrganometal Halide perovskites10aPB10aSequential Deposition10aSolar-cells1 aTathavadekar, Mukta1 aKrishnamurthy, Shrreya1 aBanerjee, Aparna1 aNagane, Satyawan1 aGawli, Yogesh1 aSuryawanshi, Anil1 aBhat, Suresh1 aPuthusseri, Dhanya1 aMohite, Aditya, D.1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/low-dimensional-hybrid-perovskites-high-performance-anodes-alkali-ion-batteries01722nas a2200181 4500008004100000245008800041210006900129260000800198300001300206490000600219520108800225100001601313700002401329700002401353700001601377700003301393856011401426 2017 eng d00aPerformance of colloidal CdS sensitized solar cells with ZnO nanorods/nanoparticles0 aPerformance of colloidal CdS sensitized solar cells with ZnO nan cJAN a 210-2210 v83 a

As an alternative photosensitizer in dye-sensitized solar cells, bovine serum albumin (BSA) (a nonhazardous protein) was used in the synthesis of colloidal CdS nanoparticles (NPs). This system has been employed to replace the commonly used N719 dye molecule. Various nanostructured forms of ZnO, namely, nanorod and nanoparticle-based photoanodes, have been sensitized with colloidal CdS NPs to evaluate their effective performance towards quantum dot sensitized solar cells (QDSSCs). A polysulphide (S-x(2-))-based electrolyte and CuxS counter electrode were used for cell fabrication and testing. An interesting improvement in the performance of the device by imposing nanorods as a scattering layer on a particle layer has been observed. As a consequence, a maximum conversion efficiency of 1.06% with an open-circuit voltage (V-OC) of 0.67 V was achieved for the ZnO nanorod/nanoparticle assembled structure. The introduction of ZnO nanorods over the nanoparticle led to a significant enhancement of the overall efficiency compared to the corresponding bare nanoparticles.

1 aRoy, Anurag1 aDas, Partha, Pratim1 aTathavadekar, Mukta1 aDas, Sumita1 aDevi, Parukuttyamma, Sujatha uhttps://library.ncl.res.in/content/performance-colloidal-cds-sensitized-solar-cells-zno-nanorodsnanoparticles01468nas a2200193 4500008004100000245010200041210006900143260000800212300001400220490000700234520077400241100002001015700002101035700001901056700002401075700002201099700002501121856012801146 2017 eng d00aSynthetic manipulation of hybrid perovskite systems in search of new and enhanced functionalities0 aSynthetic manipulation of hybrid perovskite systems in search of cOCT a3722-37390 v103 aOver the past few years the organic-inorganic hybrid perovskite systems have emerged as a promising class of materials for photovoltaic and electroluminescent thin-film device applications, in view of their unique set of tunable optoelectronic properties. Importantly, these materials can be easily solution-processed at low temperatures and as such are amenable to facile molecular engineering. Thus, a variety of low-dimensional forms and quantum structures of these materials can be obtained through strategic synthetic manipulations through small molecule incorporation or molecular ion doping. In this Minireview, we specifically focus on these approaches and outline the possibilities of utilizing these for enhanced functionalities and newer application domains.1 aNaphade, Rounak1 aNagane, Satyawan1 aBansode, Umesh1 aTathavadekar, Mukta1 aSadhanala, Aditya1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/synthetic-manipulation-hybrid-perovskite-systems-search-new-and-enhanced-functionalities