Neeta Mohite, Yogesh B Waghadkar, Parvin A Shaikh, Shankar S Kekade, Reshma Ballal, Sunit B Rane, Ratna Chauhan, Suresh W Gosavi
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引用次数: 0
Abstract
In this study, we have hydrothermally synthesized Nb2O5 nanorods of various dimensions at different reaction times. These synthesized samples were physio-chemically characterized by UV-visible, XRD, FESEM, HRTEM and XPS techniques. The absorbance spectrum has shown blue-shift than the bulk counterpart, whereas XRD and XPS confirm the formation of Nb2O5. FESEM and HRTEM reveal the formation of rod-like structures. The annealing temperature affects the surface porosity of the samples as the porous rod like Nb2O5 formed at higher annealing temperature. Further, the Nb2O5 was used as photoanode material in dye-sensitized solar cells and characterized by different photovoltaic characterization parameters (photocurrent density–voltage (J–V) curve, IPCE, FF and cell efficiency). The enhanced photovoltaic parameters were obtained for NB-2 with photocurrent value of 8.40 mA cm−2 and efficiency (η) of 3.43%. This enhanced performance is the result of high surface roughness and porosity, which assisted in improving the efficiency, dye loading and better electronic conduction pathway. Electrochemical impedance spectroscopy (EIS) was studied to understand the charge transfer and recombination at Nb2O5|dye|electrolyte interfaces.
期刊介绍:
The Bulletin of Materials Science is a bi-monthly journal being published by the Indian Academy of Sciences in collaboration with the Materials Research Society of India and the Indian National Science Academy. The journal publishes original research articles, review articles and rapid communications in all areas of materials science. The journal also publishes from time to time important Conference Symposia/ Proceedings which are of interest to materials scientists. It has an International Advisory Editorial Board and an Editorial Committee. The Bulletin accords high importance to the quality of articles published and to keep at a minimum the processing time of papers submitted for publication.