17 December 2013 Supra gap excitation properties of differently confined PbS-nano structured materials studied with opto-impedance spectroscopy
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Abstract
Nanostructures of lead sulfide (Eg ∼0.67 to 1.7 eV) corresponding to different quantum confinement regimes (weak, moderate, and strong with radii 14, 11, and 7 nm, respectively) have been synthesized through facile aqueous colloidal method and have been capped using poly vinyl alcohol. There is a marked difference in electron-lattice coupling properties as revealed through Fourier transform infrared data with strong quantum confined PbS quantum dots (QDs) exhibiting pronounced electron-lattice coupling characteristics. Opto-impedance characteristics of these samples suggest the enhanced mobility of charges, in particular under the supra gap excitation for strong quantum confined QDs.
© 2013 Society of Photo-Optical Instrumentation Engineers (SPIE)
Syed Abuthahir Ziaudeen, Syed Abuthahir Ziaudeen, Rohit R. Gaddam, Rohit R. Gaddam, Praveen Kumar Pallapothu, Praveen Kumar Pallapothu, Manoj Krishna Sugumar, Manoj Krishna Sugumar, Jagannathan Rangarajan, Jagannathan Rangarajan, } "Supra gap excitation properties of differently confined PbS-nano structured materials studied with opto-impedance spectroscopy," Journal of Nanophotonics 7(1), 073075 (17 December 2013). https://doi.org/10.1117/1.JNP.7.073075 . Submission:
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