Skip to main content Accessibility help

Low Temperature Photoluminescence Spectroscopy of Defect and Interband Transitions in CdSexTe1-x Thin Films

  • Niraj Shrestha (a1), Corey R. Grice (a1), Ebin Bastola (a1), Geethika K. Liyanage (a1), Adam B. Phillips (a1), Michael J. Heben (a1), Yanfa Yan (a1) and Randy J. Ellingson (a1)...


We present the defect analysis by photoluminescence (PL) spectroscopy of CdSexTe1-x thin films, grown with varying Se content by a co-sputtered deposition method. We observe a peak at 1.203 eV in the CdSexTe1-x film for x = 0.21, which shifts towards higher energies with increase in laser power. This peak was assigned to a donor-to-acceptor (DAP) transition, with a measured j-shift of ∼4.7 meV/decade. Temperature dependent PL intensity measurements confirm that the observed DAP peak involves a shallow defect state of binding energy ∼34.7 meV. In contrast, a free-to-bound (FB) peak at 1.294 eV involving a shallow defect of binding energy ∼18.3 meV was observed in the CdSexTe1-x film for x = 0.14. Additionally, we observe band edge emission at 1.452 eV and 1.448 eV in CdSexTe1-x films for x = 0.14 and x = 0.21 respectively. Our analysis shows that the Se concentration not only changes the band gap energy of the resulting CdSexTe1-x alloy thin film, but also modifies the nature of the dominant observed defect emission.


Corresponding author


Hide All
1.Paudel, N. R., Poplawsky, J. D., Moore, K. L. and Yan, Y., IEEE J. Photovolt. 5 (5), 14921496 (2015).
2.Paudel, N. R. and Yan, Y., Appl. Phys. Lett. 105 (18), 183510 (2014).
3.Poplawsky, J. D., Guo, W., Paudel, N., Ng, A., More, K., Leonard, D. and Yan, Y., Nat. Commun. 7, 12537 (2016).
4.Josell, D., Debnath, R., Ha, J. Y., Guyer, J., Sahiner, M. A., Reehil, C. J., Manners, W. A. and Nguyen, N. V., ACS Appl. Mater. Interfaces 6 (18), 1597215979 (2014).
5.Kim, D. U., Hangarter, C. M., Debnath, R., Ha, J. Y., Beauchamp, C. R., Widstrom, M. D., Guyer, J. E., Nguyen, N., Yoo, B. Y. and Josell, D., Sol. Energy Mater. Sol. Cells 109, 246253 (2013).
6.Ma, J. and Wei, S.-H., Phys. Rev. B 87 (24), 241201 (2013).
7.Nacir, T., Ihab, M. O. and Hussain, A., J. Phys.: Condens. Matter 21 (7), 075802 (2009).
8.Wei, S.-H., Zhang, S. B. and Zunger, A., J. Appl. Phys. 87 (3), 13041311 (2000).
9.Paudel, N. R., Grice, C. R., Xiao, C. and Yan, Y., Journal of Applied Physics 116 (4), 044506 (2014).
10.Krustok, J., Mädasson, J. and Hiie, J., Phys. Status Solidi A 165 (2), 517525 (1998).
11.Krustok, J., Valdna, V., Hjelt, K. and Collan, H., J. Appl. Phys. 80 (3), 17571762 (1996).
12.Price, K. J., Grecu, D., Shvydka, D. and Compaan, A. D., presented at the Conference Record of the Twenty-Eighth IEEE Photovoltaic Specialists Conference - 2000 (Cat. No.00CH37036), 2000 (unpublished).
13.Savitskii, A. V., Parfenyuk, O. A., Ilashchuk, M. I., Ulyanitskii, K. S., Chupyra, S. N. and Vakhnyak, N. D., Semiconductors 39 (7), 754758 (2005).
14.Van Gheluwe, J., Versluys, J., Poelman, D. and Clauws, P., Thin Solid Films 480, 264268 (2005).
15.Fernández, P., J. Optoelectron. Adv. Mater. 5, 20 (2003).
16.Schmidt, T., Daniel, G. and Lischka, K., J. Cryst. Growth 117 (1), 748752 (1992).
17.Roland, P. J., Paudel, N. R., Chuanxiao, X., Yan, Y. and Ellingson, R. J., presented at the 2014 IEEE 40th Photovoltaic Specialist Conference (PVSC), 2014 (unpublished).
18.Peter YU, M. C., Fundamentals of Semiconductors, Physics and Materials Properties, 4 ed. (Springer-Verlag Berlin Heidelberg, 2010).
19.Thomas, D. G., Hopfield, J. J. and Augustyniak, W. M., Physical Review 140 (1A), A202A220 (1965).
20.Gustavo, M., Sánchez, P. G. and Carlos, R., physica status solidi (b) 254 (11), 1700332 (2017).
21.Halliday, D. P., Potter, M. D. G., Mullins, J. T. and Brinkman, A. W., J. Cryst. Growth 220 (1), 3038 (2000).
22.Kuciauskas, D., Dippo, P., Zhao, Z., Cheng, L., Kanevce, A., Metzger, W. K. and Gloeckler, M., IEEE J. Photovolt. 6 (1), 313318 (2016).
23.Krustok, J., Collan, H. and Hjelt, K., J. Appl. Phys. 81 (3), 14421445 (1997).
24.Krustok, J., Jagomägi, A., Raudoja, J. and Altosaar, M., Sol. Energy Mater. Sol. Cells 79 (3), 401408 (2003).
25.Krustok, J., Raudoja, J., Schön, J. H., Yakushev, M. and Collan, H., Thin Solid Films 361-362, 406410 (2000).



Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed