Influence of dipping cycles on physical, optical, and electrical properties of Cu2NiSnS4: Direct solution dip coating for photovoltaic applications

JOURNAL OF ALLOYS AND COMPOUNDS

卷:725

Article

Mokurala, Krishnaiah^1,2  Mallick, Sudhanshu²  Bhargava, Parag²  Siol, Sebastian¹  Klein, Talysa R.¹  van Hest, Maikel F. A. M.¹ 

[1] Natl Renewable Energy Lab, Golden, CO 80401 USA

[2] Indian Inst Technol, Bombay 400076, Maharashtra, India

关键词: Dip coating;    Dipping cycles;    Cu2NiSnS4;    Annealing;    Optoelectronic properties;    Photo response;   

DOI  :  10.1016/j.jallcom.2017.07.188

来源: Elsevier

【 摘 要 】

Direct solution coating technique has emerged as a promising economically viable process for earth abundant chalcogenide absorber materials for photovoltaic applications. Here, direct ethanol based dip coating of earth abundant Cu2NiSnS4 (CNTS) films on soda lime glass (SLG), molybdenum coated glass (Mo), and fluorine doped tin oxide coated glass (FTO) substrates is investigated. The structural and morphological properties of pre-annealed and sulfurized CNTS films coated on SLG, FTO, and Mo substrates are reported. The influence of dipping cycles on composition and optoelectronic properties of preannealed and sulfurized CNTS films deposited on SLG substrate is presented. Energy dispersive spectroscopy (EDS) and X-ray fluorescence (XRF) analysis reveal how changes in thickness and elemental composition affect morphology and optoelectronic properties. The obtained absorption coefficient, optical bandgap, resistivity and mobility of pre -annealed and sulfurized films are found to be 104 cm(-1), 1.5 eV, 0.48 cm, 3.4 cm(2)/Vs and 104 cm(-1), 1.29 eV, 0.14 Omega cm, 11.0 cm(2)/Vs, respectively. These properties are well suited for photovoltaic applications and lead to the conclusion that the direct ethanol based dip coating can be an alternative economically viable process for the fabrication of earth abundant CNTS absorber layers for thin film solar cells. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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