Annealing behavior of reactively sputtered precursor films for Cu2ZnSnS4 solar cells
2013 (English)In: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 535, 22-26 p.Article in journal (Refereed) Published
Reactively sputtered Cu–Zn–Sn–S precursor films are prepared and recrystallized by rapid thermal processing to generate Cu2ZnSnS4 solar cell absorber layers. We study how the film properties are affected by substrate heating and composition. The stress, density and texture in the films were measured. Compressive stress was observed for the precursors but did not correlate to the deposition temperature, and had no influence on the properties of the annealed films or solar cells. However, the substrate temperature during precursor deposition had a large effect on the behavior during annealing and on the solar cell performance. The films deposited at room temperature had, after annealing, smaller grains and cracks, and gave shunted devices. Cracking is suggested to be due to a slightly higher sulfur content, lower density or to minor differences in material quality. The grain size in the annealed films seems to increase with higher copper content and higher precursor deposition temperature. The best device in the current series gave an efficiency of 4.5%.
Place, publisher, year, edition, pages
Elsevier, 2013. Vol. 535, 22-26 p.
Cu2ZnSnS4, CZTS, Kesterite, Reactive sputtering, Thin film solar cell, Stress, Density
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject Engineering Science with specialization in Electronics
IdentifiersURN: urn:nbn:se:uu:diva-188166DOI: 10.1016/j.tsf.2012.10.081ISI: 000318973600007OAI: oai:DiVA.org:uu-188166DiVA: diva2:576578