Proceedings of Perovskite Thin Film Photovoltaics (ABXPV16)
Publication date: 14th December 2015
Investigation of Cuprous Oxide (Cu2O) as Hole Transport Layer in hybrid Lead Halide Perovskite Solar Cells
Leyla Shooshtari1, Antonio Guerrero2, Raheleh Mohammadpour1, Azam Irajizad1,3 and Juan Bisquert *,2,4
a)Institute of Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran
b)Institute of Advanced Materials (INAM), Universitat Jaume I, ES-12071 Castelló, Spain
c)Department of Physics, Sharif University of Technology, Tehran, Iran
d)Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
Perovskite photovoltaic (PV) materials constitute an emerging PV technology due to their high potential to provide low production costs and highly efficient devices. With composition engineering, power conversion efficiency (PCE) exceeding 20% have been obtained [1,2]. Further improvement is expected by a careful selection of the external contacts which should provide selectivity to one of the charge carriers. Beside high efficiency, cost and stability are key parameters for these solar cells to reach maturity. Currently used materials as Hole Transport Layer (HTL) include spiro-MeOTAD, PEDOT: PSS, NiOx, CuI or CuSCN. [3-5]. Cuprous oxide (Cu2O) with direct bandgap of about 2.1 eV is also an attractive candidate due to the low production costs and due to the non-toxic nature of this p-type material [6].
In this study, Cu2O is electrodeposited on Indium Tin doped Oxide (ITO) with several thicknesses being accessed by controlling the total charge in the deposition procedure. First, Cu2O is fully characterized by SEM, absorption measurements, Kelvin Probe and impedance spectroscopy. All these techniques suggest that electrodeposited Cu2O may be used as adequate HTL. Finally, devices are fabricated in the inverted architecture (ITO/Cu2O/MAPI/PCBM/Au) to understand the scope of using this material as an efficient HTL.
References:
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[2] Brushka. J, Pellet. N, Moon. S. Nazeeruddin. M. K, Gratzel. M and et al., M, Nature, 2013,501, 395.
[3] Qin. P, Tanaka. S, Ito. S, Tetrealut. N, Manabe. K, Nazeeruddin. M. K, Gratzel. M, and et al,. 2014, Nat. Commun, 5, 3834.
[4] Christians. J. A, Fung. R.C. M, Kamat. P. V, J.Am.Chem. Soc. 2014, 136,758.
[5] Subbiah. A. S, Halder. A, Ghosh. S, Mahuli. N, Hodesh. G, Sarkar. S. K, 2014, J.Phys.Chem. Lett, 5,17848-1753.
[6] Lee. Y. S, Winkler. M. T, Siah. S. C, Brandt. R and Buonassisi. T, 2011, Appl. Phys. Lett, 98 192115.
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