The role of anisotropy for defect properties in a-plane GaN

R. Kröger; T. Paskova

doi:10.1117/12.763596

15 February 2008 The role of anisotropy for defect properties in a-plane GaN

R. Kröger, T. Paskova

Proceedings Volume 6894, Gallium Nitride Materials and Devices III; 689403 (2008) https://doi.org/10.1117/12.763596
Event: Integrated Optoelectronic Devices 2008, 2008, San Jose, California, United States

Abstract

Defect formation in wurtzite a-plane gallium nitride grown on r-plane sapphire has been studied using transmission electron microscopy. The observed defect pattern grown along the [11-20] direction shows significant differences compared to films grown along the [0001] direction. Predominant line defects identified in the a-plane GaN are Frank-Shockley partial dislocations bounding basal plane stacking faults and originating at the film/substrate interface. In order to understand the impact of the anisotropic elastic properties of the wurtzite structure on the dislocation formation and the stress around the dislocations anisotropic plane strain elasticity theory was applied and compared with results obtained from isotropic theory calculations. Furthermore, dislocation properties were calculated for AlN and InN. It was found that the line energy found for InN amounts only to about one third of the values obtained for GaN and AlN.

Citation Download Citation

R. Kröger and T. Paskova "The role of anisotropy for defect properties in a-plane GaN", Proc. SPIE 6894, Gallium Nitride Materials and Devices III, 689403 (15 February 2008); https://doi.org/10.1117/12.763596

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available