Development of low cost thin film solar cells with earth-abundant kesterite absorber

Project: Research project

Project Details


Copper Zinc Tin Sulphide (CZTS) is attracting the researcher’s interest due to its earth abundance and non-toxicity compared to CIGS and CdTe solar cell. CZTS thin film is emerging as a promising absorber layer for solar cell.
Cu2ZnSnS4 is a quaternary semiconductor material can be used as an absorber layer in a photovoltaic cell. Its band gap (1-1.5 eV) and absorption coefficient (104 cm-1) made the material as a perfect competitor for other photovoltaic technologies. It is also abundant material and environmentally benign. Maximum power conversion efficiency (12.6%) of the CZTSSe thin film solar cell was achieved by altering the partial amount of sulphur by selenium. According to the Shockley-Queisser limit, the theoretical conversion efficiency of the CZTS solar cell is 32.2%. The gap between experimental and theoretical efficiency is vast. Pilot studies have been carried out to optimise the quality of CZTS thin films by varying preparative parameters. The stability of the precursor solution was increased by adjusting the pH in the precursor solution. The precursor solution prepared at pH=2 gives the stable solution. Further optimization is needed in spray pyrolysis technique to increase the physical properties of CZTS thin film absorber layer.

Layman's description

Funding agency with sanction number and date: VGST, Govt. of Karnataka, [S. No: VGST/SMYSR/GRD 581/2017], 27-11-2017
Effective start/end date01-04-18 → 31-03-19