Abstract
Low cost single stoichiometric target sputtering of Cu2ZnSnS4 (CZTS) precursor has been adopted to fabricate CZTS solar cells. The effect of a series of deposition pressures and deposition durations on the device performance has been investigated. A 3.74% efficient solar cell has been achieved at a base pressure of 1 × 10−4 Torr with a stoichiometric target, which to the authors’ knowledge, is the record efficiency for such a stoichiometric target.
Highlights
Cu2 ZnSnS4 (CZTS) is one of the most promising thin film solar cell absorber candidates owing to its natural earth abundance, direct band gap with the optimal value of 1.45 eV, and its environmentally compatible nature [1,2]
A record efficiency of 3.74% was achieved for single stoichiometric target sputtering CZTS solar
A record efficiency of 3.74% was achieved for single stoichiometric target sputtering CZTS solar cells at a low processing pressure of 5 mTorr and a short duration of 30 min
Summary
Cu2 ZnSnS4 (CZTS) is one of the most promising thin film solar cell absorber candidates owing to its natural earth abundance, direct band gap with the optimal value of 1.45 eV, and its environmentally compatible nature [1,2]. Sputtering is a low cost option for the production of CZTS solar cells due to the large material usage, uniform large area deposition, and the ease of scale-up [3,4]. Single target sputtering is even cost effective due to the lower power supply required and easier control of the precursor deposition in comparison with multi-target sputtering; it requires less diffusion of elements. Single target sputtering leads to less voids, better film quality, and higher efficiency compared with the co-sputtering technique [5]. The highest efficiency of a single target sputtering CZTS solar cell is 6.48%, with a target composition of Cu:Zn:Sn = 1.68:1.1:1 and sulfurization in a H2 S atmosphere which has proven to be superior to S powder sulfurization [5,6]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
