Cu2SnS3 based thin film solar cells from chemical spray pyrolysis

THIN SOLID FILMS

卷:669

Article; Proceedings Paper

Sayed, Mohamed H.^1,3  Robert, Erika V. C.²  Dale, Phillip J.²  Guetay, Levent¹ 

[1] Carl von Ossietzky Univ Oldenburg, Inst Phys, Energy & Semicond Res Dept, Lab Chalcogenide Photovolta, D-26111 Oldenburg, Germany

[2] Univ Luxembourg, Phys & Mat Sci Res Unit, L-4422 Belvaux, Luxembourg

[3] Natl Res Ctr, Solid State Phys Dept, Cairo 12622, Egypt

关键词: Copper tin sulfide;    Solar cell;    Chemical spray pyrolysis;    Water-based precursor solution;    Phase transition;    Annealing;   

DOI  :  10.1016/j.tsf.2018.11.002

来源: Elsevier

【 摘 要 】

A simple and eco-friendly method for solution processing of Cu2SnS3 p-type semiconductor absorbers using a water-based precursor solution is presented. Cu2SnS3 layers were processed by chemical spray pyrolysis deposition of the precursor solution onto Mo-coated glass substrates at 350 degrees C. The as-prepared layers were placed inside a graphite susceptor with S and SnS powders and were annealed in a tube furnace at 550 degrees C. The impact of the annealing step on structural, morphological and device characteristics of the prepared layers was studied. The as-prepared layers were crack-free with fine grains and dominant tetragonal Cu2SnS3 structure. A denser and compact Cu2SnS3 layer with larger grains was formed upon annealing accompanied by a structural phase transition from the tetragonal polymorph to the monoclinic phase. The as-prepared Cu2SnS3 layers showed no photovoltaic activity, whereas the annealed layers showed a device efficiency of 0.65%. A short air annealing of the complete Cu2SnS3 device at 250 degrees C improved the overall device performance and increased the device efficiency to 1.94%. Mechanical removal of shunt paths led to Cu2SnS3 device with 2.28% efficiency.

【 授权许可】

Free