Quantum efficiency of Core/ Shell GaN/AlGaN quantum dot photodetector

Vahedi, Ali

doi:10.29252/ijpr.17.5.805

Quantum efficiency of Core/ Shell GaN/AlGaN quantum dot photodetector

Author

Ali Vahedi

https://doi.org/10.29252/ijpr.17.5.805

Abstract

In this work, oscillator strength and quantum efficiency of new spherical GaN/AlGaN quantum dot was investigated. In order to obtain these parameters, at first, Schrödinger equation is solved in GaN/AlGaN spherical coordinate system in effective mass approximation, and energy level, wave function and transition matrix element of the parameter are obtained. The results show that oscillator strength decreases with increase of mol fraction and dot size. This effect is more obvious for high mol fractions. With increasing mol fraction of defect, the peak of quantum efficiency shows blue shift. Increasing the radius of core and shell causes the red shift of quantum efficiency peak. The red and blue shifts can be very useful in tunning and controling the detector wavelenght range

Keywords

AlGaN/GaN nanostructures

infrared photodetectors

quantum efficiency

quantum dots

1. N Chen, Y He, Y Su, X Li, Q Huang, H Wang, X Zhang, R Tai, Ch Fan, Biomaterials 33 (2012) 1238.
2. A Y Liu, Ch Zhang, J Norman, A Snyder, D Lubyshev, J M Fastenau, A W K Liu, A C Gossard, J E Bowers, Appl. Phys. Lett. 104 (2014) 041104.
3. A Kh Nasab, M Sabaeian, M Rezaie, M M Rezaee, J. Eur. Opt. Soc. Rap. Public 9 (2014) 14011.
4. V Wood, V Bulovic, Nano Rev. 1 )2010( 5202.
5. A D Iacovo, C Venettacci, L Colace, L Scopa, S Foglia, Scientific Reports 6 (2016) 37913.
6. Ch H M Chuang, P R Brown, V Bulovic, M G Bwindi, Nat. Mater. 13 (2015) 796.
7. A W Walker, O Theriault, J F Wheeldon, K Hinzer, IEEE J. Photovoltaics 3 (2013) 1118.
8. M Kouhi, A Vahedi, A Akbarzadeh, Y Hanifehpour, S W Joo, Nanoscale Research Letters 9 (2014) 9.
9. K K Choi, The physics of Quantum Well Infrared Photodetectors, World Scientific, 1997.
10. J Bleuse, S Carayon, P Reiss, Physica E 21 (2004) 331.
11. A Aharoni, T Mokari, T Popov, U Banin, J, Am, Ch, Soc. 128 (2006) 257.
12. P K Kandaswamy, F Guillot and et all, J, Appl, Phys, 104 (2008) 093501.
13. O K Chang, W H Sung, K Sung, and et all, Scientific Reports 4 (2014) 5603.
14. S Siontas, P Liu, A Zaslavsky, and D Pacifici, Appl. Phys. Lett. 109 (2016) 053508.
15. R K Gujral, V Damodaran, K Ghosh, Ind. J. of Science and Technology 9 (2016) 102908.
16. G Huang, J Y Bhattacharya, P Ariyawansa, G Perera, Appl. Phys. Lett. 92 (2008) 011117.
17. A Asgari, S Razi, Optic Express 14 (2010) 14604.
18. M Kalafi, L Faraone, Physica E 25 (2005) 431.
19. A Vahedi, M kouhi, A Rostami, Optik - International Journal for Light and Electron Optics 124 (2013) 6669.
20. A Vahedi, M kouhi, A Akbarzade, Optik - International Journal for Light and Electron Optics 136 (2017) 265.