Correlation between photoluminescence and oxygen vacancies in ZnO phosphors

Applied Physics Letters - Tập 68 Số 3 - Trang 403-405 - 1996
K. Vanheusden1, C. H. Seager1, W. L. Warren1, D. R. Tallant1, J. Voigt1
1Sandia National Laboratories, Albuquerque, New Mexico 87185-1349

Tóm tắt

By combining electron paramagnetic resonance (EPR), optical absorption, and photoluminescence (PL) spectroscopy, a strong correlation is observed between the green 510 nm emission, the free-carrier concentration, and the density of singly ionized oxygen vacancies in commercial ZnO phosphor powders. From these results, we demonstrate that free-carrier depletion at the particle surface, and its effect on the ionization state of the oxygen vacancy, can strongly impact the green emission intensity. The relevance of these observations with respect to low-voltage field emission displays is discussed.

Từ khóa


Tài liệu tham khảo

1991, IEEE Trans. Electron Devices, ED-38, 2320

1954, J. Chem. Phys., 22, 250

1992, J. Lumin., 54, 35

1978, J. Appl. Phys., 49, 1188

1969, Phys. Rev. Lett., 23, 579

1981, Appl. Opt., 20, 1333

1984, Appl. Phys. Lett., 45, 395

1958, J. Phys. Chem. Solids, 9, 31

1990, Phys. Status Solidi A, 121, 195

1995, Appl. Phys. Lett., 67, 1280

1991, Phys. Status Solidi A, 125, 571

1983, J. Appl. Phys., 54, 3825

1974, Phys. Status Solidi A, 24, 637

1981, J. Appl. Phys., 52, 3960

Thông tin
Thông tin xuất bản

Applied Physics Letters

Tập 68 Số 3

403-405

Thông tin tác giả