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Synthesis, structure, and photovoltaic property of a nanocrystalline 2H perovskite-type novel sensitizer (CH3CH2NH3)PbI3

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      A new nanocrystalline sensitizer with the chemical formula (CH 3CH 2NH 3)PbI 3 is synthesized by reacting ethylammonium iodide with lead iodide, and its crystal structure and photovoltaic property are investigated. X-ray diffraction analysis confirms orthorhombic crystal phase with a = 8.7419(2) Å, b = 8.14745(10) Å, and c = 30.3096(6) Å, which can be described as 2 H perovskite structure. Ultraviolet photoelectron spectroscopy and UV-visible spectroscopy determine the valence band position at 5.6 eV versus vacuum and the optical bandgap of ca. 2.2 eV. A spin coating of the CH 3CH 2NH 3I and PbI 2 mixed solution on a TiO 2 film yields ca. 1.8-nm-diameter (CH 3CH 2NH 3)PbI 3 dots on the TiO 2 surface. The (CH 3CH 2NH 3)PbI 3-sensitized solar cell with iodide-based redox electrolyte demonstrates the conversion efficiency of 2.4% under AM 1.5 G one sun (100 mW/cm 2) illumination.

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          Optical Properties and Electronic Structure of Amorphous Germanium


            Author and article information

            [1 ]School of Chemical Engineering and Department of Energy Science, Sungkyunkwan University, Suwon, 440-746, Republic of Korea
            [2 ]Department of Chemistry, Division of Energy Systems Research, Ajou University, Suwon, 443-749, Republic of Korea
            Nanoscale Res Lett
            Nanoscale Res Lett
            Nanoscale Research Letters
            28 June 2012
            : 7
            : 1
            : 353
            Copyright ©2012 Im et al.; Licensee Springer.

            This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

            Nano Express


            (ch3ch2nh3)pbi3, 2h perovskite, sensitizer, nanodot, dye-sensitized solar cell


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