Volume : 2, Issue : 2, JAN 2018
SPECTROSCOPIC AND DIFFRACTOMETER STUDIES ON CD1SE0.6TE0.4 THIN FILMS
Cliff Orori Mosiori, Duke Ateyh Oeba
Cadmium selenide tellurium is a compound containing cadmium, tellurium and selenium elements
forming a combined solid. Hall measurements suggest that it is an n-type semiconductor. Related optical studies indicate that is transparent to infra-red radiation. Structural studies clearly show that it has a wurtzite, sphalerite crystalline forms. Cadmium is a toxic heavy metal, and selenium is only toxic in large amounts or doses. By this toxicity, cadmium selenide is a known to be carcinogen to humans; however, this does not stop investigating it for optoelectronic applications. Current research has narrowed down to investigating cadmium selenide when in the form of nanoparticles. Cadmium selenide finds applications has found applications in Opto-electronic devices like laser diodes, biomedical imaging, nano-sensing, high-efficiency solar cells and thin-film transistors.By chemical bath deposition, Cd1Se0.6Te0.4 thin films were grown onto glass. Tellurium was gradually introduced as an impurity and its crystalline structure and optical properties were investigated by XRD and UV-VIS spectroscopy. The main Cd1Se0.6Te0.4/glass characteristics were correlated with the conditions of growing and post-growth treatment and it was found out that films were homogeneous films with controllable thickness onto the glass substrate and sultable for n-type “sandwich” heterostructures applications. Comparison of the intensities of equivalent reflexions provided a test for the internal consistency of the measurements. Equivalent reflexions in two specimens differed on average by 1.4 and 0.6% from the mean measured intensity, attesting to the high internal consistency of measurements from extendedface crystals. By comparison from data obtained from all samples showed their average deviation from the mean to be 0.9%.
cadmium selenide tellurium; Cd1Se0.6Te0.4 thin films; glass; chemical bath deposition.
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1. Werlin, R., Priester, J. H., Mielke, R. E., Krämer, S., Jackson, S., Stoimenov, P. K., ... & Holden, P. A. (2011). Biomagnification of cadmium selenide quantum dots in a simple experimental microbial food chain. Nature nanotechnology, 6(1), 65-71. 2. Mosiori, Cliff Orori (2017), Electrical Behavior of Cd0.3Zn1.1x S0.7 Thin Films for Non-Heat Light Emitting Diodes , Science and Education Publishing, Physical Science International Journal, Traektoriâ Nauki, Path of Science. Vol. 3, No 6; ISSN: 2413-9009 3. Liu, Y. H., Wang, F., Wang, Y., Gibbons, P. C., & Buhro, W. E. (2011). Lamellar assembly of cadmium selenide nanoclusters into quantum belts. Journal of the American Chemical Society, 133(42), 17005-17013. 4. Hossain, M. A., Jennings, J. R., Koh, Z. Y., & Wang, Q. (2011). Carrier generation and collection in CdS/CdSe-sensitized SnO2 solar cells exhibiting unprecedented photocurrent densities. Acs Nano, 5(4), 3172-3181. 5. Mosiori, Cliff Orori; Maera, John; Njoroge, Walter. Kamande; Shikambe, T. Reuben; Munji, Matthew; Magare, Robert (2015); Modeling Transfer of electrons between Energy States of an Electrolyte and CdS thin films using Gerischer Model, Engineering International; Asian Business Consortium, Issue No: Vol. 3, Issue 1, pp 35-44; ISSN 2409-3629 6. Owen, J. S., Park, J., Trudeau, P. E., & Alivisatos, A. P. (2008). Reaction chemistry and ligand exchange at cadmium− selenide nanocrystal surfaces. Journal of the American Chemical Society, 130(37), 12279-12281. 7. Mosiori, Cliff Orori (2017), Effect of Surface Passivation on CdxNi1-xS Thin Films Embedded with Nickel Nanoparticles, Science and Education Publishing, Physical Science International Journal, Traektoriâ Nauki, Path of Science. Vol. 3, No 6; ISSN: 2413-9009
8. Yu, W. W., Qu, L., Guo, W., & Peng, X. (2003). Experimental determination of the extinction coefficient of CdTe, CdSe, and CdS nanocrystals. Chemistry of Materials, 15(14), 2854-2860.
9. Chen, J., Gao, Y., Xu, Z., Wu, G., Chen, Y., & Zhu, C. (2006). A novel fluorescent array for mercury (II) ion in aqueous solution with functionalized cadmium selenide nanoclusters. Analytica chimica acta, 577(1), 77-84.
10. Mosiori, Cliff Orori; Kwembur, Morko Isaac; Maera, John. (2016). Thermal Emittance and Solar absorptance of CdS Thin Films, International Journal of Engineering Inventions; Volume 4, Issue 11, pp: 01-05, e-ISSN: 2278-7461, p- ISSN: 2319-6491 11. Skaff, H., Ilker, M. F., Coughlin, E. B., & Emrick, T. (2002). Preparation of cadmium selenide− Polyolefin composites from functional phosphine oxides and ruthenium-based metathesis. Journal of the American Chemical Society, 124(20), 5729-5733. 12. García-Santamaría, F., Brovelli, S., Viswanatha, R., Hollingsworth, J. A., Htoon, H., Crooker, S. A., & Klimov, V. I. (2011). Breakdown of volume scaling in Auger recombination in CdSe/CdS heteronanocrystals: the role of the core− shell interface. Nano letters, 11(2), 687-693. 13. Pradhan, N., Goorskey, D., Thessing, J., & Peng, X. (2005). An alternative of CdSe nanocrystal emitters: pure and tunable impurity emissions in ZnSe nanocrystals. Journal of the American Chemical Society, 127(50), 17586-17587. 14. Robel, I., Subramanian, V., Kuno, M., & Kamat, P. V. (2006). Quantum dot solar cells. Harvesting light energy with CdSe nanocrystals molecularly linked to mesoscopic TiO2 films. Journal of the American Chemical Society, 128(7), 2385-2393. 15. Ithurria, S., Bousquet, G., & Dubertret, B. (2011). Continuous transition from 3D to 1D confinement observed during the formation of CdSe nanoplatelets. Journal of the American Chemical Society, 133(9), 3070-3077. 16. Mosiori, Cliff Orori, Njoroge, Walter N. and Okumu, John (2014), Electrical and optical characterization of CdxZn1-xS thin films deposited by chemical bath deposition in alkaline conditions; Direct Research Journal of Chemistry and Material Science, Vol.2 Issue 1, pp. 13-20, ISSN 2354 - 4163 17. Lee, J. S., Kovalenko, M. V., Huang, J., Chung, D. S., & Talapin, D. V. (2011). Band-like transport, high electron mobility and high photoconductivity in all-inorganic nanocrystal arrays. Nature nanotechnology, 6(6), 348-352.
18. Mosiori, Cliff Orori, and Maera, John. (2017), Electrical Effect of Zinc Nano-Particles on CdS Films grown by slow Solution Process, Journal of Scientific and Engineering Research, ISSN: 2394-2630, Page No. 253-260. 19. Pernik, D. R., Tvrdy, K., Radich, J. G., & Kamat, P. V. (2011). Tracking the adsorption and electron injection rates of CdSe quantum dots on TiO2: linked versus direct attachment. The Journal of Physical Chemistry C, 115(27), 13511-13519. 20. Qian, L., Zheng, Y., Xue, J., & Holloway, P. H. (2011). Stable and efficient quantum-dot light-emitting diodes based on solution-processed multilayer structures. Nature photonics, 5(9), 543-548.