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Cu2SnS3 based thin film solar cells from chemical spray pyrolysis
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 °C. The as-pre...
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Published in: | Thin solid films 2019-01, Vol.669, p.436-439 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | 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 °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 °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 °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.
•Cu2SnS3 thin films are grown by water-based chemical spray pyrolysis process•Phase transition into monoclinic Cu2SnS3 polymorph during high temperature annealing•Low temperature air annealing of the complete Cu2SnS3 cell improves the performance•The highest PCE of 2.28% obtained from chemical spray pyrolysis is reported |
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ISSN: | 0040-6090 1879-2731 |
DOI: | 10.1016/j.tsf.2018.11.002 |