A time-resolved luminescence spectroscopy study of self-trapped excitons in NH4H2PO4 crystals
- 1. Experimental Physics Department, Urals State Technical University, 19, Mira Street, 620002 Ekaterinburg (Russian Federation)
- 2. Institute of Physics, University of Tartu, 142, Riia Street, 51014 Tartu (Estonia)
Description
A complex investigation of the dynamics of electronic excitations and luminescence in nonlinear optical crystals of ammonium dihydrophosphate NH4H2PO4 was performed using low-temperature vacuum ultraviolet luminescence spectroscopy with time resolution upon selective photoexcitation by synchrotron radiation. Data on the photoluminescence (PL) decay kinetics, time-resolved PL spectra (2-6.2 eV), and time-resolved PL excitation spectra (4-24 eV) were obtained for the first time for NH4H2PO4 crystals at 8 K. It is ascertained that the PL of NH4H2PO4 crystals in the vicinity of 4.7 eV has intrinsic character due to the radiative annihilation of self-trapped excitons. Possible channels of generation and decay of relaxed and unrelaxed electronic excitations in NH4H2PO4 crystals are discussed
Additional details
Identifiers
- DOI
- 10.1016/j.jlumin.2005.02.016;
- PII
- S0022-2313(05)00067-0;
Publishing Information
- Journal Title
- Journal of Luminescence
- Journal Volume
- 115
- Journal Issue
- 1-2
- Journal Page Range
- p. 69-76
- ISSN
- 0022-2313
- CODEN
- JLUMA8
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 37060092
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- AMMONIUM PHOSPHATES; ANNIHILATION; CRYSTALS; DECAY; EV RANGE 01-10; EXCITATION; EXCITONS; PHOTOLUMINESCENCE; SPECTROSCOPY; SYNCHROTRON RADIATION; TIME RESOLUTION; TRAPPING; ULTRAVIOLET RADIATION
- Descriptors DEC
- AMMONIUM COMPOUNDS; BREMSSTRAHLUNG; ELECTROMAGNETIC RADIATION; EMISSION; ENERGY RANGE; ENERGY-LEVEL TRANSITIONS; EV RANGE; INTERACTIONS; LUMINESCENCE; OXYGEN COMPOUNDS; PARTICLE INTERACTIONS; PHOSPHATES; PHOSPHORUS COMPOUNDS; PHOTON EMISSION; QUASI PARTICLES; RADIATIONS; RESOLUTION; TIMING PROPERTIES
Optional Information
- Copyright
- Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.