A simple and robust route toward flexible CIGS photovoltaic devices on polymer substrates: Atomic level microstructural analysis and local opto-electronic investigation

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In this work, copper indium gallium selenide (Cu(In,Ga)Se-2; CIGS) absorbers were grown on polyimide (PI)/molybdenum substrates by a three-stage co-evaporation process at various temperatures, film formation was systemically studied using various advanced characterization methods such as transmission electron microscopy, micro-Raman spectroscopy, Kelvin probe force microscopy, and atom probe tomography. The CIGS films on PI were found to exhibit considerable physical and electrical variations with respect to the process temperature of three-stage co-evaporation. In particular, when the process temperature reached 400 degrees C, the CIGS absorber on PI began to exhibit controlled microstructure and intergrain properties. By adjusting the microstructure and intergrain properties of the absorber films by means of the process temperature of three-stage co-evaporation, flexible CIGS solar cells on PI with an efficiency of 16.7% (with anti-refection coating) were achieved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2019-06
Language
English
Article Type
Article
Citation

SOLAR ENERGY MATERIALS AND SOLAR CELLS, v.195, pp.280 - 290

ISSN
0927-0248
DOI
10.1016/j.solmat.2019.03.008
URI
http://hdl.handle.net/10203/262268
Appears in Collection
MS-Journal Papers(저널논문)
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