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Fabrication of CdSe Sensitized SnO2 Nanofiber Quantum Dot Solar Cells

Publication Type : Journal Article

Thematic Areas : Nanosciences and Molecular Medicine

Publisher : Materials Science in Semiconductor Processing.

Source : Materials Science in Semiconductor Processing, Volume 41, p.370 - 377 (2016)

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Keywords : Cadmium selenide (CdSe), Electrospinning, Quantum dot solar cells (QDSC), Successive-Ionic-Layer Adsorption and Reaction (SILAR), Tin oxide nanofibers

Campus : Kochi

School : Center for Nanosciences

Center : Amrita Center for Nanosciences and Molecular Medicine Move, Nanosciences

Department : Nanosciences and Molecular Medicine

Year : 2016

Abstract : In the present study, we report a cost-effective quantum dot solar cells based on a combination of electrospinning and successive-ionic-layer-adsorption and reaction (SILAR) methods. CdSe nanocrystals are deposited on electrospun SnO2 nanofibers by SILAR method using CdCl2 as the cadmium source and Na2Se as selenium source. The as-prepared materials are characterized by spectroscopy and microscopy. CdSe deposited SnO2 electrodes are also characterized by spectroscopy and microscopy. Cells are fabricated with platinum (Pt)-sputtered FTO glasses used as the counter electrodes and polysulfide solution used as the electrolyte. The efficiency of the cells is studied for different number of SILAR cycles. Current density–voltage (J–V) measurements on a cell having CdSe deposition of 7 SILAR cycles and SnO2 coating area 0.25cm2 showed an overall power conversion efficiency of 0.29 % with a photocurrent density (JSC) of 5.32mA cm−2 and open circuit voltage (VOC) of 0.23V under standard 1Sun illumination of 100mWcm−2 (AM 1.5G conditions). This is improved by carefully coating SnO2 film without losing the structures. Also ZnS passivation layer is coated to obtain an improved efficiency of 0.48% with JSC of 4.68mAcm−2, and VOC of 0.43V

Cite this Research Publication : G. E. Unni, Deepak, T. G., and A. Nair, S., “Fabrication of CdSe Sensitized SnO2 Nanofiber Quantum Dot Solar Cells”, Materials Science in Semiconductor Processing, vol. 41, pp. 370 - 377, 2016.

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