Rational Defect Passivation of Cu2ZnSn(S,Se)4 Photovoltaics with Solution-Processed Cu2ZnSnS4:Na Nanocrystals
Citations Over TimeTop 1% of 2013 papers
Abstract
An effective defect passivation route has been demonstrated in the rapidly growing Cu2ZnSn(S,Se)4 (CZTSSe) solar cell device system by using Cu2ZnSnS4:Na (CZTS:Na) nanocrystals precursors. CZTS:Na nanocrystals are obtained by sequentially preparing CZTS nanocrystals and surface decorating of Na species, while retaining the kesterite CZTS phase. The exclusive surface presence of amorphous Na species is proved by X-ray photoluminescence spectrum and transmission electron microscopy. With Na-free glasses as the substrate, CZTS:Na nanocrystal-based solar cell device shows 50% enhancement of device performance (∼6%) than that of unpassivated CZTS nanocrystal-based device (∼4%). The enhanced electrical performance is closely related to the increased carrier concentration and elongated minority carrier lifetime, induced by defect passivation. Solution incorporation of extrinsic additives into the nanocrystals and the corresponding film enables a facile, quantitative, and versatile approach to tune the defect property of materials for future optoelectronic applications.
Related Papers
- → Phase evolution of Cu2ZnSnS4 (CZTS) kesterite thin films during the sulfurization process(2015)38 cited
- → Kesterite CZTS nanocrystals: pH‐dependent synthesis(2014)27 cited
- → One-step sonochemical synthesis route towards kesterite Cu2ZnSnS4 nanoparticles(2015)23 cited
- → The effect of the Zn/Sn ratio on the formation of single phase kesterite Cu 2 ZnSnS 4 solar cell material(2017)11 cited
- → Na incorporation controlled single phase kesterite Cu2ZnSnS4 solar cell material(2020)12 cited