News Column

Study Findings on Biological Pigments Are Outlined in Reports from Annamalai University

June 24, 2014

By a News Reporter-Staff News Editor at Life Science Weekly -- Fresh data on Biological Factors are presented in a new report. According to news reporting originating in Tamil Nadu, India, by NewsRx journalists, research stated, "The present investigation described the performance of dye-sensitized solar cells (DSSCs) based on various sensitizers applied on TiO2-Nb2O5 core/shell photoanode film. The novel photoanodes were prepared using composite of TiO2 nanoparticles (TNPs) and TiO2 nanorods (TNRs) as core (TNPRs) layer with Nb2O5 shell coating."

The news reporters obtained a quote from the research from Annamalai University, "As well, tantalum pentoxide (Ta2O5), a blocking layer applied over the core/shell film. The DSSCs were fabricated based on various sensitizers namely zinc phthalocyanine, indoline, indigo carmine, zinc porphyrin, N719, coumarin NKX-2700, polymer dye, quantum dots (QDs), perylene and squaraine. The I-V characteristics of the DSSCs, photocurrent density (Jsc), open-circuit voltage (Voc), fill factor (FF), and photoconversion efficiency (PCE) were determined under illumination of AM 1.5 G. Electrochemical impedance spectroscopy (EIS) analysis is carried out to study the charge transport and life-time of charge carriers at photoanode/dye/electrolyte interface of the DSSCs. The I-V and EIS results explicated that the core/shell with blocking layers were able to alleviate the electron transport and suppressed charge recombination at photoanode/dye/electrolyte interface of the DSSCs. Concerning the sensitizers, PCE of the DSSCs exemplify the order N719 > zinc porphyrin > coumarin NKX-2700 > indoline > squaraine > QDs > zinc phthalocyanine > perylene > polymer dye > indigo carmine dye. The results of the present work demonstrated that among the sensitizers studied, N719 showed the highest PCE and fill factor."

According to the news reporters, the research concluded: "Besides, the metal-free organic sensitizers (coumarin NKX-2700 and indoline) exhibited comparable PCE as compared to N719."

For more information on this research see: Performance of dye-sensitized solar cells based on various sensitizers applied on TiO2-Nb2O5 core/shell photoanode structure. Journal of Solid State Electrochemistry, 2014;18(6):1601-1609. Journal of Solid State Electrochemistry can be contacted at: Springer, 233 Spring St, New York, NY 10013, USA. (Springer -; Journal of Solid State Electrochemistry -

Our news correspondents report that additional information may be obtained by contacting R. Elangovan, Annamalai Univ, Dept. of Phys DDE, Annamalainagar, Tamil Nadu, India. Additional authors for this research include N.G. Joby and P. Venkatachalam (see also Biological Factors).

Keywords for this news article include: Asia, India, Tamil Nadu, Porphyrins, Biological Factors, Biological Pigments

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Source: Life Science Weekly

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