Issue 4, 2021

Platinum-free dye-sensitized solar cells by flower-like mixed-phase CoxSy/NixSy/MoxSy composites

Abstract

Many materials have been explored as a counter electrode material to replace platinum electrode in dye-sensitized solar cells (DSSCs). In this work, CoxSy/NixSy/MoxSy composites at two different compositions, namely, CNM10, CNM25 were synthesized via hydrothermal method. The XRD, FE-SEM, and EDX analysis of the samples confirmed the formation of CNM10 and CNM25 composites. The cyclic voltammetry (CV) study of CNM10 and CNM25 electrodes showed faster triiodide ion reduction at the electrode/electrolyte interface than the Pt electrode. The electrochemical impedance spectroscopy studies of CNM10 and CNM25 electrodes showed lower RCT values for both CNM10 and CNM25 electrodes than that of a Pt electrode. Tafel polarization measurement showed a higher limiting current value of CNM25 followed by CNM10 and Pt electrodes. Based on these studies, DSSCs were fabricated using CNM10, CNM25, and Pt CE. CNM25 CE showed an enhanced power conversion efficiency (PCE) (7.8%) with VOC of 824 mV, and JSC of 15.7 mA cm−2, whereas, Pt CE showed PCE of 6.5% with VOC of 775 mV and JSC of 13.2 mA cm−2.

Graphical abstract: Platinum-free dye-sensitized solar cells by flower-like mixed-phase CoxSy/NixSy/MoxSy composites

Supplementary files

Article information

Article type
Paper
Submitted
11 Nov 2020
Accepted
06 Jan 2021
First published
06 Jan 2021

New J. Chem., 2021,45, 1967-1976

Platinum-free dye-sensitized solar cells by flower-like mixed-phase CoxSy/NixSy/MoxSy composites

V. Subbiah, G. Landi, J. J. Wu, S. Anandan and M. Ashokkumar, New J. Chem., 2021, 45, 1967 DOI: 10.1039/D0NJ05512C

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