Fabrication of Highly Fluorescent Cadmium Based Aqueous Phase Colloidal Quantum Dots for Solar Cell Applications

Abstract:

Highly fluorescent Cadmium based II-VI CQD’s plays a vital role in third generation photovoltaic’s design. In this paper, a novel approach for rapid synthesis of two different high quality cadmium based CQD’s in aqueous phase was presented and the optical stability and the structural properties of those materials were studied out. In this work Tellurium composed CQD’s along with cadmium were prepared by colloidal route. In the above procedure Thio Glycolic Acid (TGA) as well as Mercapto succinic acids (MSA) was used as the capping agents. All these procedures were carried out in aqueous medium at air atmosphere. The size dependent band gaps of the prepared quantum dots were determined from UV-Vis spectra and compared with the other one. The fluorescent properties of CdTe CQDs were investigated by using fluorescence spectra. The surface and structural morphologies were determined by using HRSEM and X-ray diffraction studies. The formation of CdTe quantum dots and the capping effect of the thiol group were investigated from EDAX and FTIR analysis.

• Periodical: Advanced Materials Research (Volume 584)
• Pages: 313-318
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.584.313
• Online since: October 2012
• Authors: Ayyaswamy Arivarasan, Sasikala Ganapathy, Ramasamy Jayavel
• Keywords: CdTe, Colloidal Quantum Dots (CQD’s), Thio Glycolic Acid

References

[1] Coe-Sullivan, S. Quantum dot developments,. Nat. Photonics 2009, 3, 315–316.

[2] Alivisatos, A.P. Semiconductor clusters, nanocrystals, and quantum dots,. Science 271, 933- 937 (1996).

DOI: 10.1126/science.271.5251.933

[3] Bruchez M, Moronne M, Gin P, Weiss S, Alivisatos A. P. Semiconductor nanocrystals as fluorescent biological labels. Science, 1998, 281(5385): 2 013–2 016.

DOI: 10.1126/science.281.5385.2013

[4] Alivisatos A P. Perspectives on the physical chemistry of semiconductor nanocrystals. Journal of Physics Chemistry, 1996, 100(31): 13226–13239.

DOI: 10.1021/jp9535506

[5] Woggon, U. Optical Properties of Semiconductor Quantum Dots,; Springer-Verlag: Berlin, Germany, 1997; Volume 136.

[6] Hernandez-Calderon, Optical Properties and Electronic Structure of Wide Band Gap II-VI Semiconductors" in" II-VI Semiconductor Materials and Their Applications,. By M.C. Tamargo, (Taylor & Francis, Ann Arbor, MI, 2002).

DOI: 10.1201/9780203751305-4

[7] Yu, W.W., Qu, L., Guo, W. & Peng, X. Experimental determination of the extinction coefficient of CdTe, CdSe, and CdS nanocrystals,. Chem. Mater. 15, 2854-2860 (2003).

DOI: 10.1021/cm034081k

[8] Murray, C.B., Norris, D.J. & Bawendi, M.G. Synthesis and characterization of nearly monodisperse CdE (E=S, Se, Te) semiconductor nanocrystallites.,J. Am. Chem. Soc. 115, 8706-8715 (1993).

DOI: 10.1021/ja00072a025

[9] Gao, M.Y., Kirstein, S., Möhwald, H., Rogach, A.L., Kor-nowski, A., Eychmüller,A., Weller, H., Strongly photo-luminescent CdTe nanocrystals by proper surface modifi-cation, J. Phys. Chem. B, 102, 8360—8363(1998).

DOI: 10.1021/jp9823603

[10] Medintz, I.L., Uyeda, H.T., Goldman, E.R. & Mattoussi, H. Quantum dot bioconjugates for imaging, labelling and sensing,. Nat. Mater. 4, 435-446 (2005).

DOI: 10.1038/nmat1390

[11] Ying E, Li D, Guo S, Dong S, Wang J ( 2008) Synthesis and Bio-Imaging Application o f Highly Luminescent Mercaptosuccinic Acid-Coated CdTe Nanocrystals. PLoS ONE 3(5): e2222. doi: 10. 1371/job urnal. pone. 0002 222.

DOI: 10.1371/journal.pone.0002222

[12] Yu WW, Q u L , Guo W, Peng X (2003) Experimental determination of the extinction coefficient of CdTe , CdSe , and CdS nanocrystals. Chem. Mater 15: 2854– 2860.

DOI: 10.1021/cm034081k

[13] Alivisatos AP (199 6) Semiconductor Clusters, Nanocrystals, and Quantum Dots. Science 271: 933–937.

DOI: 10.1126/science.271.5251.933

[14] H. Qian, C. Dong, J. Weng, J. Ren, Small 2 (2006) 747.

[15] Y. Zheng, S. GAO, J.Y. Ying, Ad v. Mate r. 19 (2007) 376.

[16] Peng ZA, Peng X (2001) Formation of High-quality CdTe, CdSe and CdS Nanocrystals Using CdO as Precursor. J. Am. Chem. S oc. 123: 183–184.

DOI: 10.1021/ja003633m