M.S. Roy

Dye‐sensitized Solar Cells for Solar Energy Harvesting

Dye‐sensitized solar cells (DSSCs) also known as Gratzel cells, have attracted the interests of researchers to a great extent because of its cost effective and easy manufacturing process without involving highly sophisticated lithographic technique and high cost raw materials as usually seen in conventional solar cell. Based on simple photo‐electrochemical process, it has got immense potential in converting solar energy to electrical power in remote and desert area where the supply of conventional power is not possible. The overall peak power‐production efficiency of dye‐sensitized solar cells has been reported around 11 percent, so they are best suited to low‐density applications and the price‐to‐performance ratio obtained through these solar cells is superior to others. DSSCs have ability to absorb even diffused sunlight and therefore work in cloudy whether as well without much impact over the efficiency. The present communication deals with a review of our work on DSSCs wherein we have used cost effect...

Low Dose Gamma Radiation Monitoring Through TiO2 Doped Lead Phthalocyanine (Pb‐Pc) Based Schottky Device

The concept of Organic thin film based solid‐state dosimeters is relatively new and more effective. The organic conductor based solid‐state dosimeter provides a mean for low cost, ease to fabricate and sensitive radiation sensor which can be employed as pocket dosimeter for army personals getting exposed to nuclear radiation while working in the radioactive environment This concept is being utilized here for monitoring the effect of nuclear radiation on our organic material based sandwiched devices. In the present communication, lead Phthalocyanine (PbPc) doped with TiO2 (5% by weight) is developed into the form of thin film structure. The developed ITO/PbPc: TiO2/Ag Schottky device structure was characterized in terms of change in its electrical and optical properties before and after exposure to radiation Exposure to radiation imparts an accelerated decrease in forward bias current and capacitance characteristics reveal a linear relationship between dose v/s current behavior which supports its suitabili...

Dye Sensitized Solar Cell Based On Pyronin G Dye and TiO2

Dye sensitized solar cell (DSSC), was fabricated with nano‐crystalline TiO2 absorbed Pyronin G (PYR G) dye using polar solvent treated poly(3,4 elthylene dioxythiophene):poly (sturene sulfate) (PEDOT:PSS) coated conductive glass (Florine doped tin oxide, FTO) as counter electrode. Their absorption spectra, photoaction and photovoltaic properties were studied. Impedance analysis was also employed to analyse the charge transfer kinetics at the electrolyte/counter electrode interface. Using the solvent treated PEDOT:PSS coated FTO as counter electrode, a 1.2% power conversion efficiency of DSSC was obtained under 73 mW cm−2 irradiation.