Ripon Bhattacharjee | Queensland University of Technology (original) (raw)

Ripon Bhattacharjee

Address: Taipei, T'ai-pei, Taiwan

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Papers by Ripon Bhattacharjee

Research paper thumbnail of Material characteristics and electrochemical performance of Sn-doped ZnO spherical-particle photoanode for dye-sensitized solar cells

The aim of this study was to examine the effects of Sn element on the characteristics and electro... more The aim of this study was to examine the effects of Sn element on the characteristics and electrochemical properties of ZnO spherical-particle used as dye sensitized solar cells (DSSCs) photoanode. Spherical nanoparticles were synthesized via a polyol mediated precipitation method and four concentrations of Sn-Zn = 0, 3, 4, and 5 wt.% of photoelectrodes were prepared. Their structures, morphologies, photovoltaic performances and electrochemical properties were studied through XRD, SEM, TEM, J-V, IPCE and EIS. It was observed that the efficiency of dye-sensitized solar cells increased with the addition of Sn element and the SZO4 (Sn-Zn = 4 wt.%) based DSSC had the highest power energy conversion efficiency of 0.80%, which is greatly increased compared to that of the DSSC based on ZnO (0.28%).

Research paper thumbnail of A SnO 2 and ZnO Nanocomposite Photoanodes in Dye-Sensitized Solar Cells

2.02% conversion efficiency Dye-sensitized solar cell (DSSC) is achieved based on an additional i... more 2.02% conversion efficiency Dye-sensitized solar cell (DSSC) is achieved based on an additional insulating layer of Li doped ZnO nanoparticles (LZN) onto SnO 2 nanocomposite photoanode. The morphology, incident photon to current conversion efficiency (IPCE), AC impedance and photovoltaic performance were investigated of nanocomposited, nanoflower and nanoparticle photoanodes based DSSCs. Suppression recombination rate in nanocomposite DSSC, has achieved a high filling factor of 68.9% with 80.6% of IPCE. SnO 2 nanoparticles improved the interconnections between SnO 2 nanoflowers with FTO substrate and LZN. Fully covered SnO 2 nanocomposite by an insulating layer of LZN nanoparticles improved the conversion efficiency of SnO 2 DSSC.

Research paper thumbnail of Effect of different concentration Li-doping on the morphology, defect and photovoltaic performance of LieZnO nanofibers in the dye-sensitized solar cells

Different Li concentrations were used to dope ZnO nanofibers. High amount of oxygen vacancy in Li... more Different Li concentrations were used to dope ZnO nanofibers. High amount of oxygen vacancy in LieZnO nanofibers were found by photoluminescence. Low amount of Li doping ZnO nanofibers have 3e4 times higher efficiency with high OCV. Li doping improved the electron injection efficiency of ZnO nanofibers.

Research paper thumbnail of Performance of the Salt Bridge Based Microbial Fuel Cell

Electricity generation from readily biodegradable organic substrates accompanied by decolorizatio... more Electricity generation from readily biodegradable organic substrates accompanied by decolorization of azo dye was investigated using a Microbial fuel cell (MFC). Biodegradation was the dominant mechanism of the dye removal, and glucose was the optimal substrate for Red Cibacron-2G (RC) decolorization. Batch experiments were conducted to evaluate the performance of the MFC. As compared to traditional anaerobic technology higher decolorization efficiency was achieved by MFC. Effect of initial dye concentration and external resistance on power generation were studied. Polarization experiments were also directed to find the maximum power density. Maximum Power density of 100mW/m 2 (1.04A/m 2 ) was recorded at optimum operating conditions.

Research paper thumbnail of Material characteristics and electrochemical performance of Sn-doped ZnO spherical-particle photoanode for dye-sensitized solar cells

The aim of this study was to examine the effects of Sn element on the characteristics and electro... more The aim of this study was to examine the effects of Sn element on the characteristics and electrochemical properties of ZnO spherical-particle used as dye sensitized solar cells (DSSCs) photoanode. Spherical nanoparticles were synthesized via a polyol mediated precipitation method and four concentrations of Sn-Zn = 0, 3, 4, and 5 wt.% of photoelectrodes were prepared. Their structures, morphologies, photovoltaic performances and electrochemical properties were studied through XRD, SEM, TEM, J-V, IPCE and EIS. It was observed that the efficiency of dye-sensitized solar cells increased with the addition of Sn element and the SZO4 (Sn-Zn = 4 wt.%) based DSSC had the highest power energy conversion efficiency of 0.80%, which is greatly increased compared to that of the DSSC based on ZnO (0.28%).

Research paper thumbnail of A SnO 2 and ZnO Nanocomposite Photoanodes in Dye-Sensitized Solar Cells

2.02% conversion efficiency Dye-sensitized solar cell (DSSC) is achieved based on an additional i... more 2.02% conversion efficiency Dye-sensitized solar cell (DSSC) is achieved based on an additional insulating layer of Li doped ZnO nanoparticles (LZN) onto SnO 2 nanocomposite photoanode. The morphology, incident photon to current conversion efficiency (IPCE), AC impedance and photovoltaic performance were investigated of nanocomposited, nanoflower and nanoparticle photoanodes based DSSCs. Suppression recombination rate in nanocomposite DSSC, has achieved a high filling factor of 68.9% with 80.6% of IPCE. SnO 2 nanoparticles improved the interconnections between SnO 2 nanoflowers with FTO substrate and LZN. Fully covered SnO 2 nanocomposite by an insulating layer of LZN nanoparticles improved the conversion efficiency of SnO 2 DSSC.

Research paper thumbnail of Effect of different concentration Li-doping on the morphology, defect and photovoltaic performance of LieZnO nanofibers in the dye-sensitized solar cells

Different Li concentrations were used to dope ZnO nanofibers. High amount of oxygen vacancy in Li... more Different Li concentrations were used to dope ZnO nanofibers. High amount of oxygen vacancy in LieZnO nanofibers were found by photoluminescence. Low amount of Li doping ZnO nanofibers have 3e4 times higher efficiency with high OCV. Li doping improved the electron injection efficiency of ZnO nanofibers.

Research paper thumbnail of Performance of the Salt Bridge Based Microbial Fuel Cell

Electricity generation from readily biodegradable organic substrates accompanied by decolorizatio... more Electricity generation from readily biodegradable organic substrates accompanied by decolorization of azo dye was investigated using a Microbial fuel cell (MFC). Biodegradation was the dominant mechanism of the dye removal, and glucose was the optimal substrate for Red Cibacron-2G (RC) decolorization. Batch experiments were conducted to evaluate the performance of the MFC. As compared to traditional anaerobic technology higher decolorization efficiency was achieved by MFC. Effect of initial dye concentration and external resistance on power generation were studied. Polarization experiments were also directed to find the maximum power density. Maximum Power density of 100mW/m 2 (1.04A/m 2 ) was recorded at optimum operating conditions.

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