Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.



Boosting the efficiency of solution-based CZTSSe solar cells by supercritical carbon dioxide treatment

Author affiliations

Abstract

Cu2ZnSn(S,Se)4 (CZTSSe) solar cells have been receiving considerable attention in recent years, owing to their low cost and toxicity as well as a high abundance of their constituent elements. Solution-based (mainly precursor solution) methods have been widely used in the fabrication of CZTSSe-based thin film solar cells. Though most record solar cells since 2009 have been achieved using solution-based methods, carbonaceous residues are always formed during post deposition treatment (PDT). These carbonaceous residues are detrimental to grain growth of CZTSSe to form large grains. The presence of unwanted small grain layers will increase the series resistance and reduce the fill factor of the solar cell, thus consequently decreasing the efficiency of CZTSSe solar cells. Herein, we propose “green” supercritical carbon dioxide (SCCO2) treatment to overcome the challenge of carbonaceous residues. FT-IR, SEM, XRD and Raman characterization studies were used to confirm the reduction of carbonaceous residues in CZTSSe films. The solar cell fabricated from a selenized CZTSSe precursor film with SCCO2 treatment under optimal conditions showed the best conversion efficiency of 11.23% (VOC = 0.456 V, JSC = 36.6 mA cm−2, FF = 67.1%). To the best of our knowledge, this is the first report on boosting the efficiency of solution-based CZTSSe solar cells by using SCCO2 treatment. In addition, this unique SCCO2 treatment may also bring forth new ideas for other solution-based optoelectronic devices.

Graphical abstract: Boosting the efficiency of solution-based CZTSSe solar cells by supercritical carbon dioxide treatment

Back to tab navigation

Supplementary files

Article information


Submitted
17 Apr 2020
Accepted
05 May 2020
First published
06 May 2020

Green Chem., 2020, Advance Article
Article type
Paper

Boosting the efficiency of solution-based CZTSSe solar cells by supercritical carbon dioxide treatment

H. Xiao, W. Zhou, D. Kou, Z. Zhou, Y. Meng, Y. Qi, S. Yuan, Q. Tian and S. Wu, Green Chem., 2020, Advance Article , DOI: 10.1039/D0GC01355B

Social activity

Search articles by author

Spotlight

Advertisements