Abstract
Cadmium sulfide (CdS) nanoparticles of three different sizes of 1.49, 2.0, and 2.1 nm were synthesized by the chemical method using thioglycerol as a capping agent. Optical absorption, wide angle x-ray scattering (WAXS), small angle x-ray scattering (SAXS), and high-resolution transmission electron microscopy (HRTEM) measurements revealed that nearly monodispersed particles of high quality could be obtained using a simple and straightforward method used in the present investigation. The nanoparticles were further used to fabricate heterojunctions with poly-phenylene-vinylene (PPV), and current-voltage characteristics were measured. A large forward current density of 21 mA cm−2 at 1 V is obtained for samples having the smallest average particle size and 13 mA cm−2 for the samples having the largest particle size among the samples investigated.
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Acknowledgements
The author thanks Professor S.N. Mohammad and Dr. S.S. Hullavarad, University of Maryland, and Professor S.K. Kulkarni, University of Pune, for fruitful discussions during this work. The author acknowledges W. Vogel, J. Urban, Fritz-Haber Institut der Max-Planck-Gesselschaft, Berlin, Germany, C. Heske, R. Fink, and E. Umbach, Universitaet of Wuerzburg, Wuerzburg, Germany, for x-ray and electron microscopy measurements. The author also acknowledges the United States Defense Micro Electronics Activity (DMEA) for financial support at the University of Alaska, Fairbanks.
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Deshmukh, N. Chemical Synthesis of Narrow-Sized Distributions of Cadmium Sulfide Nanoparticles for Fabrication of Poly-Phenylene-Vinylene–Cadmium Sulfide (PPV-CdS) Diodes. J. Electron. Mater. 36, 634–640 (2007). https://doi.org/10.1007/s11664-007-0119-3
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DOI: https://doi.org/10.1007/s11664-007-0119-3