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Issue 31, 2014
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Fully solution processed all inorganic nanocrystal solar cells

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Abstract

The effects of solution (sol) processed contacts of indium tin oxide (ITO-sol) and gold (Au-sol) on solar cells are tested. When combined with solution processed active layers of CdTe/CdSe, all-inorganic fully solution processed solar cells are produced on non-conductive glass substrates. Under AM 1.5G illumination, open circuit voltages (Voc), short circuit currents (Jsc) and efficiencies (η) of solar cells processed with evaporated Au and commercial ITO were found to be (Voc = 0.56 ± 0.04 V, Jsc = 17.2 ± 2.2 mA cm−2, η = 3.8 ± 0.4%), with Au-sol replacement (Voc = 0.54 ± 0.03 V, Jsc = 12.6 ± 1.0 mA cm−2, η = 2.0 ± 0.1%), with ITO-sol (Voc = 0.38 ± 0.04 V, Jsc = 12.3 ± 0.8 mA cm−2, η = 1.3 ± 0.2%), and with each layer solution processed (Voc = 0.49 ± 0.01 V, Jsc = 10.0 ± 1.5 mA cm−2, η = 1.5 ± 0.2%) with the champion fully-solution processed all-inorganic device showing η = 1.7%. Layers and devices were characterized with UV/Vis spectroscopy, optical profilometry, XRD, XPS and SEM. The results indicate that the reduced performance of the all-solution devices results primarily from increased roughness of the Au film and decreased conductivity of the ITO layer.

Graphical abstract: Fully solution processed all inorganic nanocrystal solar cells

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Publication details

The article was received on 01 Jun 2014, accepted on 23 Jun 2014 and first published on 23 Jun 2014


Article type: Paper
DOI: 10.1039/C4CP02403F
Author version available: Download Author version (PDF)
Citation: Phys. Chem. Chem. Phys., 2014,16, 16458-16464
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    Fully solution processed all inorganic nanocrystal solar cells

    T. K. Townsend and E. E. Foos, Phys. Chem. Chem. Phys., 2014, 16, 16458
    DOI: 10.1039/C4CP02403F

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