High Internal Quantum Efficiency Ultraviolet Emission from Phase-Transition Cubic GaN Integrated on Nanopatterned Si(100)
- Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States); Micro and Nanotechnology Technology Lab., Urbana, IL (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Univ. of Illinois at Urbana−Champaign, Urbana, IL (United States)
Ultraviolet emission characteristics of cubic (c-) GaN enabled through hexagonal-to-cubic phase transition are reported. Substrate patterning and material growth are shown to affect phase purity and emission characteristics of c-GaN as studied by electron backscatter diffraction, and photo- and cathodoluminescence, respectively. Raman study shows a tensile strain in the c-GaN. Time-resolved photoluminescence reveals c-GaN band edge emission decay time of 11 ps. The ultraviolet emissions from both phases of GaN are linearly polarized in the same direction, which is along the < 11$$ \overline{20}\ $$ > and < 110 > directions of hexagonal GaN and c-GaN, respectively. Temperature-dependent (5.7 to 280 K) cathodoluminescence studies reveal an internal quantum efficiency of ~29% at room temperature along with intrinsic and extrinsic defect energy levels of ~124 and ~344 meV, respectively, of the phase-transition c-GaN. Using the IQE value and carrier decay lifetime, a radiative lifetime of 38 ps is extracted. Altogether, photonic properties of phase-transition c-GaN and their dependence on substrate patterning and material growth are reported.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- National Aeronautics and Space Administration (NASA); Univ. of Illinois – Urbana-Champaign; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1489243
- Journal Information:
- ACS Photonics, Vol. 5, Issue 3; ISSN 2330-4022
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Photoluminescence Line‐Shape Analysis of Highly n‐Type Doped Zincblende GaN
|
journal | April 2020 |
How to control defect formation in monolithic III/V hetero-epitaxy on (100) Si? A critical review on current approaches
|
journal | August 2018 |
Influence of the free-electron concentration on the optical properties of zincblende GaN up to
|
journal | October 2019 |
Structural and Electronic Properties of Hexagonal and Cubic Phase AlGaInN Alloys Investigated Using First Principles Calculations
|
journal | April 2019 |
Similar Records
Incorporation of indium on cubic GaN epitaxially induced on a nanofaceted Si(001) substrate by phase transition
Growth of non-polar (11-20) InGaN quantum dots by metal organic vapour phase epitaxy using a two temperature method