Works (41)

2019 | journal article

Structural characteristics of m-plane AlN substrates and homoepitaxial films

JOURNAL OF CRYSTAL GROWTH, 507, 389–394.

By: M. Graziano, I. Bryan, Z. Bryan, R. Kirste, J. Tweedie, R. Collazo, Z. Sitar

Source: NC State University Libraries
Added: January 28, 2019

2017 | journal article

High free carrier concentration in p-GaN grown on AlN substrates

Applied Physics Letters, 111(3).

By: B. Sarkar, S. Mita, P. Reddy, A. Klump, F. Kaess, J. Tweedie, I. Bryan, Z. Bryan ...

Source: NC State University Libraries
Added: August 6, 2018

2017 | journal article

Nonlinear analysis of vanadium- and titanium-based contacts to Al-rich n-AlGaN

Japanese Journal of Applied Physics, 56(10).

By: B. Haidet, B. Sarkar, P. Reddy, I. Bryan, Z. Bryan, R. Kirste, R. Collazo, Z. Sitar

Source: NC State University Libraries
Added: August 6, 2018

2016 | journal article

Point defect reduction in wide bandgap semiconductors by defect quasi Fermi level control

Journal of Applied Physics, 120(18).

By: P. Reddy, M. Hoffmann, F. Kaess, Z. Bryan, I. Bryan, M. Bobea, A. Klump, J. Tweedie ...

Source: NC State University Libraries
Added: August 6, 2018

2016 | journal article

Surface kinetics in AlN growth: A universal model for the control of surface morphology in III-nitrides

Journal of Crystal Growth, 438, 81–89.

By: I. Bryan, Z. Bryan, S. Mita, A. Rice, J. Tweedie, R. Collazo, Z. Sitar

Source: NC State University Libraries
Added: August 6, 2018

2016 | journal article

Very slow decay of a defect related emission band at 2.4 eV in AlN: Signatures of the Si related shallow DX state

Journal of Applied Physics, 119(15).

By: M. Lamprecht, C. Grund, B. Neuschl, K. Thonke, Z. Bryan, R. Collazo, Z. Sitar

Source: NC State University Libraries
Added: August 6, 2018

2016 | journal article

The role of surface kinetics on composition and quality of AlGaN

Journal of Crystal Growth, 451, 65–71.

By: I. Bryan, Z. Bryan, S. Mita, A. Rice, L. Hussey, C. Shelton, J. Tweedie, J. Maria, R. Collazo, Z. Sitar

Source: NC State University Libraries
Added: August 6, 2018

2015 | journal article

Charge neutrality levels, barrier heights, and band offsets at polar AlGaN

Applied Physics Letters, 107(9).

By: P. Reddy, I. Bryan, Z. Bryan, J. Tweedie, S. Washiyama, R. Kirste, S. Mita, R. Collazo, Z. Sitar

Source: NC State University Libraries
Added: August 6, 2018

2015 | journal article

Electronic biosensors based on III-nitride semiconductors

Annual Review of Analytical Chemistry, Vol 8, 8, 149–169.

Source: NC State University Libraries
Added: August 6, 2018

2015 | journal article

Growth and characterization of AlxGa1-xN lateral polarity structures

Physica Status Solidi. A, Applications and Materials Science, 212(5), 1039–1042.

By: M. Hoffmann, R. Kirste, S. Mita, W. Guo, J. Tweedie, M. Bobea, I. Bryan, Z. Bryan ...

Source: NC State University Libraries
Added: August 6, 2018

2015 | journal article

High internal quantum efficiency in AlGaN multiple quantum wells grown on bulk AlN substrates

Applied Physics Letters, 106(14).

By: Z. Bryan, I. Bryan, J. Xie, S. Mita, Z. Sitar & R. Collazo

Source: NC State University Libraries
Added: August 6, 2018

2015 | journal article

KOH based selective wet chemical etching of AlN, AlxGa1-xN, and GaN crystals: A way towards substrate removal in deep ultraviolet-light emitting diode

Applied Physics Letters, 106(8).

By: W. Guo, R. Kirste, I. Bryan, Z. Bryan, L. Hussey, P. Reddy, J. Tweedie, R. Collazo, Z. Sitar

Source: NC State University Libraries
Added: August 6, 2018

2015 | journal article

Long-term stability assessment of AlGaN/GaN field effect transistors modified with peptides: Device characteristics vs. surface properties

AIP Advances, 5(9).

Source: NC State University Libraries
Added: August 6, 2018

2015 | journal article

Strain dependence on polarization properties of AlGaN and AlGaN-based ultraviolet lasers grown on AlN substrates

Applied Physics Letters, 106(23).

By: Z. Bryan, I. Bryan, S. Mita, J. Tweedie, Z. Sitar & R. Collazo

Source: NC State University Libraries
Added: August 6, 2018

2015 | journal article

A conduction model for contacts to Si-doped AlGaN grown on sapphire and single-crystalline AlN

Journal of Applied Physics, 117(24).

Source: NC State University Libraries
Added: August 6, 2018

2014 | journal article

AlGaN/GaN field effect transistors functionalized with recognition peptides

Applied Physics Letters, 105(13).

Source: NC State University Libraries
Added: August 6, 2018

2014 | conference paper

Effects of environmental exposure on stability and conductance poly-l-lysine coated AlGaN/GaN high electron mobility transistors

In Wide bandgap semiconductor materials and devices 15 (Vol. 61, pp. 147–151).

Source: NC State University Libraries
Added: August 6, 2018

2014 | journal article

Exciton transitions and oxygen as a donor in m-plane AlN homoepitaxial films

Journal of Applied Physics, 115(13).

Source: NC State University Libraries
Added: August 6, 2018

2014 | journal article

Fermi level control of compensating point defects during metalorganic chemical vapor deposition growth of Si-doped AlGaN

Applied Physics Letters, 105(22).

By: Z. Bryan, I. Bryan, B. Gaddy, P. Reddy, L. Hussey, M. Bobea, W. Guo, M. Hoffmann ...

Source: NC State University Libraries
Added: August 6, 2018

2014 | journal article

HVPE-GaN grown on MOCVD-GaN/sapphire template and ammonothermal GaN seeds: Comparison of structural, optical, and electrical properties

Journal of Crystal Growth, 394, 55–60.

By: T. Sochacki, Z. Bryan, M. Amilusik, M. Bobea, M. Fijalkowski, I. Bryan, B. Lucznik, R. Collazo ...

Source: NC State University Libraries
Added: August 6, 2018

2014 | journal article

Homoepitaxial AlN thin films deposited on m-plane (1(1)over-bar00) AlN substrates by metalorganic chemical vapor deposition

Journal of Applied Physics, 116(13).

Source: NC State University Libraries
Added: August 6, 2018

2014 | conference paper

Properties of AlN based lateral polarity structures

In Physica status solidi c: current topics in solid state physics, vol 11, no 2 (Vol. 11, pp. 261–264).

By: R. Kirste, S. Mita, M. Hoffmann, L. Hussey, W. Guo, I. Bryan, Z. Bryan, J. Tweedie ...

Source: NC State University Libraries
Added: August 6, 2018

2014 | journal article

Sapphire decomposition and inversion domains in N-polar aluminum nitride

Applied Physics Letters, 104(3).

By: L. Hussey, R. White, R. Kirste, S. Mita, I. Bryan, W. Guo, K. Osterman, B. Haidet ...

Source: NC State University Libraries
Added: August 6, 2018

2014 | journal article

Schottky contact formation on polar and non-polar AlN

Journal of Applied Physics, 116(19).

By: P. Reddy, I. Bryan, Z. Bryan, J. Tweedie, R. Kirste, R. Collazo, Z. Sitar

Source: NC State University Libraries
Added: August 6, 2018

2014 | journal article

Stimulated emission and optical gain in AlGaN heterostructures grown on bulk AlN substrates

Journal of Applied Physics, 115(10).

By: W. Guo, Z. Bryan, J. Xie, R. Kirste, S. Mita, I. Bryan, L. Hussey, M. Bobea ...

Source: NC State University Libraries
Added: August 6, 2018

2014 | conference paper

Surface preparation of non-polar single-crystalline AlN substrates

In Physica status solidi c: current topics in solid state physics, vol 11, no 3-4 (Vol. 11, pp. 454–457).

Source: NC State University Libraries
Added: August 6, 2018

2014 | journal article

The effect of polarity and surface states on the Fermi level at III-nitride surfaces

Journal of Applied Physics, 116(12).

Source: NC State University Libraries
Added: August 6, 2018

2014 | journal article

The role of the carbon-silicon complex in eliminating deep ultraviolet absorption in AlN

Applied Physics Letters, 104(20).

By: B. Gaddy, Z. Bryan, I. Bryan, J. Xie, R. Dalmau, B. Moody, Y. Kumagai, T. Nagashima ...

Source: NC State University Libraries
Added: August 6, 2018

2013 | journal article

Compensation effects in GaN: Mg probed by Raman spectroscopy and photoluminescence measurements

Journal of Applied Physics, 113(10).

By: R. Kirste, M. Hoffmann, J. Tweedie, Z. Bryan, G. Callsen, T. Kure, C. Nenstiel, M. Wagner ...

Source: NC State University Libraries
Added: August 6, 2018

2013 | journal article

Fermi level control of point defects during growth of Mg-doped GaN

Journal of Electronic Materials, 42(5), 815–819.

By: Z. Bryan, M. Hoffmann, J. Tweedie, R. Kirste, G. Callsen, I. Bryan, A. Rice, M. Bobea ...

Source: NC State University Libraries
Added: August 6, 2018

2013 | journal article

Ge doped GaN with controllable high carrier concentration for plasmonic applications

Applied Physics Letters, 103(24).

By: R. Kirste, M. Hoffmann, E. Sachet, M. Bobea, Z. Bryan, I. Bryan, C. Nenstiel, A. Hoffmann ...

Source: NC State University Libraries
Added: August 6, 2018

2013 | journal article

Lasing and longitudinal cavity modes in photo-pumped deep ultraviolet AlGaN heterostructures

Applied Physics Letters, 102(17).

By: J. Xie, S. Mita, Z. Bryan, W. Guo, L. Hussey, B. Moody, R. Schlesser, R. Kirste ...

Source: NC State University Libraries
Added: August 6, 2018

2013 | journal article

Preparation of free-standing GaN substrates from thick GaN layers crystallized by hydride vapor phase epitaxy on ammonothermally grown GaN seeds

Applied Physics Express, 6(7).

By: T. Sochacki, Z. Bryan, M. Amilusik, R. Collazo, B. Lucznik, J. Weyher, G. Nowak, B. Sadovyi ...

Source: NC State University Libraries
Added: August 6, 2018

2013 | journal article

Strain relaxation by pitting in AlN thin films deposited by metalorganic chemical vapor deposition

Applied Physics Letters, 102(6).

By: I. Bryan, A. Rice, L. Hussey, Z. Bryan, M. Bobea, S. Mita, J. Xie, R. Kirste, R. Collazo, Z. Sitar

Source: NC State University Libraries
Added: August 6, 2018

2013 | journal article

Vacancy compensation and related donor-acceptor pair recombination in bulk AlN

Applied Physics Letters, 103(16).

By: B. Gaddy, Z. Bryan, I. Bryan, R. Kirste, J. Xie, R. Dalmau, B. Moody, Y. Kumagai ...

Source: NC State University Libraries
Added: August 6, 2018

2013 | journal article

X-ray characterization techniques for the assessment of surface damage in crystalline wafers: A model study in AlN

Journal of Applied Physics, 113(12).

By: M. Bobea, J. Tweedie, I. Bryan, Z. Bryan, A. Rice, R. Dalmau, J. Xie, R. Collazo, Z. Sitar

Source: NC State University Libraries
Added: August 6, 2018

2012 | journal article

On the origin of the 265 nm absorption band in AlN bulk crystals

Applied Physics Letters, 100(19).

By: R. Collazo, J. Xie, B. Gaddy, Z. Bryan, R. Kirste, M. Hoffmann, R. Dalmau, B. Moody ...

Source: NC State University Libraries
Added: August 6, 2018

2012 | journal article

Optical signature of Mg-doped GaN: Transfer processes

Physical Review. B, Condensed Matter and Materials Physics, 86(7).

By: G. Callsen, M. Wagner, T. Kure, J. Reparaz, M. Bugler, J. Brunnmeier, C. Nenstiel, A. Hoffmann ...

Source: NC State University Libraries
Added: August 6, 2018

| journal article

Nanostructure surface patterning of GaN thin films and application to AlGaN/AlN multiple quantum wells: A way towards light extraction efficiency enhancement of III-nitride based light emitting diodes

Guo, W., Kirste, R., Bryan, Z., Bryan, I., Gerhold, M., Collazo, R., & Sitar, Z. Journal of Applied Physics, 117(11).

By: W. Guo, R. Kirste, Z. Bryan, I. Bryan, M. Gerhold, R. Collazo, Z. Sitar

Source: NC State University Libraries
Added: August 6, 2018

| conference paper

On the origin of the 4.7 eV absorption and 2.8 eV emission bands in bulk AlN substrates

Alden, D., Bryan, Z., Gaddy, B. E., Bryan, I., Callsen, G., Koukitu, A., … Collazo, R. In Wide bandgap semiconductor materials and devices 17 (Vol. 72, pp. 31–40).

By: D. Alden, Z. Bryan, B. Gaddy, I. Bryan, G. Callsen, A. Koukitu, Y. Kumagai, A. Hoffmann ...

Source: NC State University Libraries
Added: August 6, 2018

| conference paper

Point defect management in GaN by Fermi-level control during growth

Hoffmann, M. P., Tweedie, J., Kirste, R., Bryan, Z., Bryan, I., Gerhold, M., … Collazo, R. In Gallium nitride materials and devices ix (Vol. 8986).

By: M. Hoffmann, J. Tweedie, R. Kirste, Z. Bryan, I. Bryan, M. Gerhold, Z. Sitar, R. Collazo

Source: NC State University Libraries
Added: August 6, 2018