15 Result(s)

Article

Persistent Photoinduced Changes in Charge States of Donors and Acceptors in Hydrothermally Grown ZnO

Bulk ZnO grown by the hydrothermal technique was investigated using electron paramagnetic resonance (EPR), photoluminescence (PL), and infrared absorption (FTIR) techniques. Isolated subsitutional lithium is t...

Nancy C. Giles, Yongquan Jiang, **aocheng Yang… in MRS Online Proceedings Library (2007)

Article

Determination of the Nitrogen Acceptor Ionization Energy in Zinc Oxide by Photoluminescence Spectroscopy

Photoluminescence (PL) experiments performed on bulk ZnO crystals are used to establish the ionization energy of the substitutional nitrogen acceptor. The temperature dependence of the nitrogen-related electro...

Lijun Wang, N. Y. Garces, L. E. Halliburton, N. C. Giles in MRS Online Proceedings Library (2003)

Article

Thermal diffusion of lithium acceptors into ZnO crystals

Electron paramagnetic resonance (EPR) has been used to monitor the diffusion of lithium ions into single crystals of ZnO. The in-diffusion occurs when a crystal is embedded in LiF powder and then held in air a...

N. Y. Garces, Lijun Wang, N. C. Giles, L. E. Halliburton… in Journal of Electronic Materials (2003)

Article

Optical and EPR Study of Defects in Cadmium Germanium Arsenide

Bulk crystals of CdGeAs₂ have been characterized using photoluminescence (PL), optical absorption, Hall effect, and electron paramagnetic resonance (EPR) techniques. An absorption band near 5.5 microns at room te...

Lihua Bai, N. Y. Garces, Nanying Yang, P. G. Schunemann… in MRS Online Proceedings Library (2003)

Article

Luminescence and EPR Study of Lithium-Diffused ZnO Crystals

Zinc oxide (ZnO) crystals grown by the seeded chemical vapor transport method have been studied using photoluminescence (PL), thermoluminescence (TL), and electron paramagnetic resonance (EPR) techniques. Lith...

N. Y. Garces, Lijun Wang, M. M. Chirila… in MRS Online Proceedings Library (2003)

Article

Photoinduced Changes in the Charge States of Native Donors and Acceptors in ZnGeP₂

Bulk ZnGeP₂ (ZGP) crystals grown for high-power tunable mid-infrared laser systems contain large concentrations of three native defects. Using EPR, these three defects have been identified as the Zn vacancy (an a...

K. T. Stevens, S. D. Setzler, P. G. Schunemann… in MRS Online Proceedings Library (2000)

Article

Photoluminescence and EPR of Phosphorus Vacancies in ZnGep₂

Zinc germanium diphosphide (ZnGeP₂) is a nonlinear optical material used in mid-infrared optical parametric oscillators. The near-infrared photoluminescence (PL) from single crystals of bulk ZnGeP₂ has been studi...

M. Moldovan, K. T. Stevens, L. E. Halliburton… in MRS Online Proceedings Library (2000)

Article

Native Defects in the Ternary Chalcopyrites

N. C. Giles, L. E. Halliburton in MRS Bulletin (1998)

Article

Point defects in Cd_1−xZn_xTe: A correlated photoluminescence and EPR study

Cd_1−xZn_xTe (CZT) is an emerging material for room-temperature x-ray and gamma-ray detectors. The identification and control of point defects and charge compensators in the bulk material are currently important is...

C. I. Rablau, S. D. Setzler, L. E. Halliburton… in Journal of Electronic Materials (1998)

Article

Electron-Nuclear Double Resonance Study of the Zinc Vacancy in Zinc GERMANIUM PHOSPHIDE (ZnGeP₂)

As-grown crystals of ZnGeP₂ are highly compensated and contain significant concentrations of donors and acceptors. The dominant acceptor in ZnGeP₂ is believed to be the zinc vacancy. This center is paramagnetic i...

K. T. Stevens, S. D. Setzler, L. E. Halliburton… in MRS Online Proceedings Library (1997)

Article

Pl and Epr Spectroscopy of Point Defects in Detector-Grade Cd_1-xZn_xTe

Cadmium zinc telluride (CdZnTe) is an emerging material for room-temperature x-ray and gamma ray detectors. The identification and control of point defects and charge compensators are currently important issue...

C. I. Rablau, S. D. Setzler, L. E. Halliburton… in MRS Online Proceedings Library (1997)

Article

Photoluminescence of nitrogen-doped zinc selenide epilayers

Photoluminescence (PL) studies of nitrogen doped ZnSe epilayers grown by molecular beam epitaxy have been performed as a function of excitation wavelength, power density, and temperature. The broad emission fr...

M. Moldovan, S. D. Setzler Zhonghaiyu, T. H. Myers… in Journal of Electronic Materials (1997)

Article

Photoluminescence and Electron Paramagnetic Resonance of Nitrogen-Doped Zinc Selenide Epilayers

Photoluminescence (PL) and electron paramagnetic resonance (EPR) studies were performed on a series of ZnSe samples grown by molecular beam epitaxy. The PL has been studied as a function of excitation waveleng...

M. Moldovan, S. D. Setzler, Z. Yu, T. H. Myers… in MRS Online Proceedings Library (1996)

Article

Electron Paramagnetic Resonance and Photoluminescence Studies of Point Defects in Zinc Germanium Phosphide (ZnGeP₂)

Electron paramagnetic resonance (EPR) has been used to monitor native defects, both acceptors and donors, in ZnGeP₂ crystals grown by the horizontal gradient freeze technique. These active centers include singly ...

S. D. Setzler, L. E. Halliburton, N. C. Giles… in MRS Online Proceedings Library (1996)

Article

Radiation Damage Mechanisms In Scintillator Materials: Applications to BaF₂ and CeF₃

Results from recent radiation damage studies in high quality BaF₂ and CeF₃ crystals are presented. Optical absorption and electron paramagnetic resonance (EPR) techniques are used to identify specific radiation d...

L. E. Halliburton, G. J. Edwards in MRS Online Proceedings Library (1994)