Author:
Im Jeong-Hyeok,Chung Jaehoon,Kim Seung-Joo,Park Nam-Gyu
Abstract
Abstract
A new nanocrystalline sensitizer with the chemical formula (CH3CH2NH3)PbI3 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 CH3CH2NH3I and PbI2 mixed solution on a TiO2 film yields ca. 1.8-nm-diameter (CH3CH2NH3)PbI3 dots on the TiO2 surface. The (CH3CH2NH3)PbI3-sensitized solar cell with iodide-based redox electrolyte demonstrates the conversion efficiency of 2.4% under AM 1.5 G one sun (100 mW/cm2) illumination.
Publisher
Springer Science and Business Media LLC
Subject
Condensed Matter Physics,General Materials Science
Reference19 articles.
1. Alivisatos AP: Perspectives on the physical chemistry of semiconductor nanocrystals. J Phys Chem 1996, 100: 13226. 10.1021/jp9535506
2. Alivisatos AP: Semiconductor clusters, nanocrystals, and quantum dots. Science 1996, 271: 933. 10.1126/science.271.5251.933
3. Gaponenko: Optical properties of semiconductor nanocrystals. Cambridge University Press, Cambridge; 1998.
4. Lee J, Sundar VC, Heine JR, Bawendi MG, Jensen KF: Full color emission from II-VI semiconductor quantum dot-polymer composites. Adv Mater 2000, 12: 1311.
5. Michalet X, Pinaud FF, Bentolila LA, Tsay JM, Doose S, Li JJ, Sundaresan G, Wu AM, Gambhir SS: Quantum dots for live cells, in vivo imaging, and diagnostics. Science 2005, 307: 538. 10.1126/science.1104274
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