Das, Priyanka and Mondal, Biswanath and Mukherjee, Kalisadhan (2018) Improved efficiency of ZnO hierarchical particle based dye sensitized solar cell by incorporating thin passivation layer in photo-anode. Applied Physics A, 124. pp. 1-9.

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Present article describes the DSSC performances of photo-anodes prepared using hydrothermal route derived ZnO particles having dissimilar morphologies i.e. simple micro-rod and nano-tips decorated micro-rod. The surface of nano-tips decorated micro-rod is uneven and patterned which facilitate more dye adsorption and better scattering of the incident light resulting superior photo-conversion efficiency (PCE) (η ~ 1.09%) than micro-rod ZnO (η ~ 0.86%). To further improve the efficiency of nano-tips decorated micro-rod ZnO based DSSC, thin passivation layer of ZnO is introduced in the corresponding photo-anode and a higher PCE (η ~ 1.29%) is achieved. The compact thin passivation layer here expedites the transportation of photo-excited electrons, restricts the undesired recombination reactions and prevents the direct contact of electrolyte with conducting substrates. Attempt is made to understand the effect of passivation layer on the transportation kinetics of photo-excited electrons by analyzing the electrochemical impedance spectra of the developed cells.

Item Type: Article
Subjects: Dye sensitised solar cell
Depositing User: Dr. Arup Kr. Nandi
Date Deposited: 14 Jul 2020 06:02
Last Modified: 14 Jul 2020 06:02
URI: http://cmeri.csircentral.net/id/eprint/547

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