Control of composition and grain growth in Cu2ZnSnS4 thin films from nanoparticle inks

被引：21

作者：

Ataollahi, Narges ^{[1
]}

Malerba, Claudia ^{[1
,2
]}

Cappelletto, Elisa ^{[1
]}

Ciancio, Regina ^{[3
]}

Edla, Raju ^{[3
]}

Di Maggio, Rosa ^{[1
]}

Scardi, Paolo ^{[1
]}

机构：

[1] Univ Trento, Dept Civil Environm & Mech Engn, Via Mesiano 77, I-30123 Trento, Italy

[2] Enea Casaccia Res Ctr, Via Anguillarese 301, I-00123 Rome, Italy

[3] CNR IOM, TASC Lab, Area Sci Pk, I-34149 Trieste, Italy

来源：

THIN SOLID FILMS | 2019年 / 674卷

关键词：

Kesterite; Copper zinc tin sulphide; Nanoparticles; Nanocrystals; Ink; Carbon; Grain growth; SOLAR-CELLS; LOW-COST; NANOCRYSTALS; EFFICIENCY; CARBON; CONFINEMENT; FABRICATION; PYROLYSIS;

D O I：

10.1016/j.tsf.2019.02.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cu2ZnSnS4 (CZTS) nanocrystals (NCs) were produced via hot-injection from metal chloride precursors. A systematic investigation of the influence of synthesis conditions on composition, size and microstructure of CZTS NCs is presented. The results show that the solvent amount (oleylamine) is a key parameter in the synthesis of this quaternary chalcogenide: a low solvent content leads to CZTS NCs with a prominent kesterite phase with the desired composition for use as absorber material in thin film photovoltaic cells. It is also observed that lowering the injection temperature (250 degrees C) favours formation of CZTS NCs in the wurtzite phase. The effect of different high temperature thermal treatments on the grain growth is also shown: large crystals are obtained with annealing in inert atmosphere, whereas nanocrystalline films are obtained introducing sulphur vapour during the heat treatment. A correlation between the grain dimension and the carbonaceous residues in the final films is investigated. It is shown that the grain growth is hindered by organic residues, amount and nature of which depend on the heat treatment atmosphere. In fact, oleylamine is removed by a complex pyrolytic process, which is affected by the presence of sulphur vapour. The latter favours the stability of oleylamine residuals against its non-oxidative release.

引用

页码：12 / 21

页数：10

共 58 条

[1] Non-vacuum processed next generation thin film photovoltaics: Towards marketable efficiency and production of CZTS based solar cells [J].