Divya Jyoti

INVESTIGATION OF TRANSPORT AND OPTICAL PROPERTIES OF MESOPOROUS ANATASE AND RUTILE TiO2 FILMS FOR APPLICATION IN DYE-SENSITIZED SOLAR CELLS

The transport of electrons through TiO2 anatase and rutile thin films synthesized via sol–gel route has been investigated using electronic and optical spectroscopic studies. Mesoporosity of the films is confirmed by poroellipsometry. A smaller electron effective mass in anatase can be accounted for larger effective Bohr radius of trap electrons observed in anatase than in rutile. Further, the smaller effective mass in anatase favors high mobility. A mott transition is observed in anatase with change in temperature but not in rutile. Luminescence of self-trapped excitons is observed in anatase thin films, that implies a strong lattice relaxation.

Investigation of the opulent porosity for better performance of dye-sensitized solar cell

The presented research work is an effort to optimize porosity of TiO2 film to get enhanced performance of dye-sensitized solar cell. A novel and economic technique is presented to control the porosity. Poroellipsometry was used to measure porosity of the films. A comparison between microporous (P = 22.3), mesoporous (P = 39.1), and macroporous (63.6) structures has been made by obtaining current density-voltage (JV) characteristics and incident photon to current conversion efficiency curves. It has been found that morphology of mesoporous films with porosity P = 39.1 is best suited for dye-sensitized solar cells. The results are in well agreement with theoretical predictions regarding porosity.

Process optimization of dye-sensitized solar cells using \(\hbox {TiO}_{2}\)–graphene nanocomposites

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To probe the equivalence and opulence of nanocrystal and nanotube based dye-sensitized solar cells

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The growth mechanism of ordered mesoporous electrodes in view of their response in dye-sensitized solar cells

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To investigate opulence of graphene in ZnO/graphene nanocomposites based dye sensitized solar cells

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