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Issue 45, 2015
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Copper thiocyanate (CuSCN): an efficient solution-processable hole transporting layer in organic solar cells

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Abstract

Here, we report copper(I)thiocyanate (CuSCN) as an efficient and solution-processable hole transport layer (HTL) in bulk heterojunction solar cells. Three different combinations of the most studied active layers of P3HT:PC61BM, PCDTBT:PC71BM and PTB7:PC71BM were used for photovoltaic device fabrication with the simplest device structure of ITO/CuSCN/active layer/Al. The use of CuSCN as an HTL has improved light absorption within the active layer and thereby leads to up to 5.94% and 4.60% power conversion efficiencies (PCEs) for the active layers of PCDTBT:PC71BM and PTB7:PC71BM, respectively. These results are slightly better when compared to the devices fabricated using thermal deposition of MoO3 and solution processed deposition of PEDOT:PSS as an HTL under similar conditions. We have observed that the annealing temperature for HTLs in organic solar cells has a significant effect on the PCE, specifically the fill factor (FF) and short-circuit current (Jsc). In the present work, the resulting HTLs were characterized using UV-vis-NIR spectroscopy, scanning electron microscopy (SEM), atomic force microscopy (AFM) and transmission electron microscopy (TEM) for better understanding. Finally, we have provided a further example of solution-processable CuSCN as an efficient HTL in organic solar cells, in general.

Graphical abstract: Copper thiocyanate (CuSCN): an efficient solution-processable hole transporting layer in organic solar cells

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Publication details

The article was received on 30 Sep 2015, accepted on 13 Oct 2015 and first published on 15 Oct 2015


Article type: Paper
DOI: 10.1039/C5TC03124A
J. Mater. Chem. C, 2015,3, 11886-11892

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    Copper thiocyanate (CuSCN): an efficient solution-processable hole transporting layer in organic solar cells

    N. Chaudhary, R. Chaudhary, J. P. Kesari, A. Patra and S. Chand, J. Mater. Chem. C, 2015, 3, 11886
    DOI: 10.1039/C5TC03124A

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