Controlled Cu2SnS3 CTS Thin Film Growth by Centrifugal Colloidal Casting for CTS Solar Cell Applications

Abstract

Thin film solar cell technology has attracted substation attention due to its potential to achieve inexpensive, environmentally friendly, and high performance. Especially, Cu2SnS3 (CTS) is considered recently as efficient solar absorbers in thin film solar cells because it composed of earth abundant and non-toxic elements. It also exhibits high absorption coefficient and desirable optical/electrical properties. In this work, we report the CTS thin films fabricated using CTS colloidal quantum dots (CQDs), where the CQDs were synthesized by hot injection method. The ligands and structures of CQDs were controlled for optimized thin film fabrications. The thin films were deposited on substrates by centrifugal casting and subsequent annealing. [1] Through this technique combined with CQDs solution tuning, we could control film thickness as well as resultant film properties. Our method may give some clues for achieving low-cost and high-efficient thin film solar cells.