Fabrication Of Cost Effective Pt And FTO-free Counter Electrode For ZnO Based Dye Sensitized Solar Cell Using Thermally Decomposed Cu2ZnSnS4 Nanoparticles

Chaitanya Bathina1, Krishnaiah Mokurala2*, Prasanth Ravindran1, Parag Bhargava2,Sudhanshu Mallick2*

1Center for Green Energy Technology, Pondicherry University, R.V. Nagar, Kalapet, Puducherry - 605 014, India

2Department of Metallurgical Engineering & Materials Science, Indian Institute of Technology Bombay, Maharashtra 400076, India

Adv. Mater. Lett., 2016, 7 (11), pp 861-865

DOI: 10.5185/amlett.2016.6234

Publication Date (Web): Oct 01, 2016

E-mail:krishna887@iitb.ac.in, mallick@iitb.ac.in

Abstract


Use of Pt and fluorine-doped tin oxide (FTO) substrate together as a counter electrode (CE) significantly increases the fabrication cost of dye-sensitized solar cells (DSSCs). In the present study, we report the cost effective Pt and FTO-free (Cu2ZnSnS4 (CZTS) nanoparticle coated on W substrate) CE for ZnO-based DSSCs. Phase purity, the morphology and elemental composition of synthesized ZnO, CZTS nanoparticles and films were confirmed by physical characteristics such as XRD, FEG-TEM, and FEG-SEM respectively. Cyclic voltammetry study confirmed electrochemical catalytic activity of CZTS films. DSSCs fabricated with CZTS film on W and FTO substrate as CE exhibited efficiencies of 2% and 2.8%, respectively. Conventionally used Pt-based CE demonstrated an efficiency of 3.8 %.

Keywords

Cu2ZnSnS4, thermal decomposition of metal precursors, tungsten (W), dye-sensitized solar cells, I-V characteristics, counter electrode.

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