Non-Polar Wurtzite (112¯0) GaN/AlN Quantum Dots for Highly Efficient Opto-Electronic Devices

Electronics

Doyeol Ahn¹  Seoung-Hwan Park² 

[1] Department of Electrical and Computer Engineering, University of Seoul, Seoulsiripdae-ro 163, Tongdaimoon-Gu, Seoul 02504, Korea;Department of Electronics Engineering, Catholic University of Daegu, Hayang, Kyeongsan 38430, Gyeongbuk, Korea;

关键词: GaN;    AlN;    quantum dot;    non-polar;    light emission;   

DOI  :  10.3390/electronics9081256

来源: DOAJ

【 摘 要 】

In III-nitride quantum dots (QDs), optical transition rate is very low because of the large built-in electrostatic field caused by the spontaneous polarization (SP) and piezoelectric (PZ) effects. In this work, we study the screening potential which is a solution of the self-consistent Hartree equation taking into account the built-in electrostatic field and its effect on light emission characteristics of non-polar wurtzite (WZ) $\left(11\overline{2}0\right)$ GaN/AlN QD. It is found that the light emission intensity of the non-polar $\left(11\overline{2}0\right)$ GaN/AlN QD structure is expected to be about four times larger than that of the c-plane (0001) GaN/AlN QD structure because the y-polarized matrix elements in the non-polar QD are larger than that in the c-plane QD. These predictions indicate that non-polar GaN/AlN QD structure have strong potential for highly efficient opto-electronic devices.

【 授权许可】

Unknown