A time-resolved luminescence spectroscopy study of self-trapped excitons in NH4H2PO4 crystals

Огородников, И. Н.; Пустоваров, В. А.; Kirm, M.; Cheremnykh, Vlad S.

doi:10.1016/j.jlumin.2005.02.016

Cited by 8 publications

(6 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The characteristics of the 4.7 eV PL band of ADP (Figs. 1-3) correlate well with the characteristics of the STE luminescence band of KDP (Ogorodnikov et al, 2004). Thus, the low-temperature PL band of ADP at 4.7 eV has also the same origin arising from the radiative annihilation of STEs.…”

Section: Resultssupporting

confidence: 62%

“…Analysis of our results ( Figs. 1 and 2), the data of Ogorodnikov et al (2001Ogorodnikov et al ( , 2003Ogorodnikov et al ( , 2004 and Diéguez et al (1984) showed that, at temperatures below 50 K, PL bands at 2.5-2.6 eV and PL bands at 4.7-5.2 eV with similar properties are observed in the PL spectra of undoped KDP and ADP crystals. At low temperatures, these bands are dominant both in the PL spectra upon photoexcitation in the FA region and in the X-ray induced luminescence spectra.…”

Section: Resultsmentioning

confidence: 61%

“…Such features are characteristic of the luminescence due to the radiative annihilation of self-trapped excitons (STEs). Ogorodnikov et al (2003Ogorodnikov et al ( , 2004 revealed previously an STE luminescence with similar properties in KDP, which belongs to the same family as ADP. The characteristics of the 4.7 eV PL band of ADP (Figs.…”

Section: Resultsmentioning

confidence: 65%

“…At low temperatures, these bands are dominant both in the PL spectra upon photoexcitation in the FA region and in the X-ray induced luminescence spectra. The temperature quenching of both bands in the spectra of ADP and KDP crystals occurs in the same way above 20 K. Ogorodnikov et al (2001Ogorodnikov et al ( , 2003Ogorodnikov et al ( , 2004 showed that these PL bands in KDP have an intrinsic origin. Similarity of these systems leads us to the opinion that the 2.6 and 4.7 eV PL bands in the ADP crystals can have similar origin.…”

Section: Resultsmentioning

confidence: 75%

“…Simultaneously, time-integrated PL spectra were recorded. The other experimental details were the same as reported by us earlier (Ogorodnikov et al, 2004).…”

Section: Methodsmentioning

confidence: 90%

See 4 more Smart Citations

Luminescence of the hydrogen bonded crystals

Огородников¹,

Kirm

Пустоваров³

2007

Radiation Measurements

View full text Add to dashboard Cite

A complex investigation of the dynamics of electronic excitations in the hydrogen bonded crystals of potassium and ammonium dihydrophosphates-KH 2 PO 4 (KDP) and NH 4 H 2 PO 4 (ADP)-is performed by the means of the low-temperature time-resolved vacuum ultraviolet (VUV) optical luminescence spectroscopy with subnanosecond time resolution and with selective photoexcitation by synchrotron radiation. For KDP and ADP crystals, data on the kinetics of the photoluminescence (PL) decay, the time-resolved PL spectra (2-6.2 eV), and the time-resolved excitation PL spectra (4-24 eV) at 8 K were obtained. The intrinsic character of the PL of KDP (5.2 eV) and ADP (4.7 eV), which is caused by the radiative annihilation of self-trapped excitons (STEs), is ascertained. Possible channels of generation and decay of relaxed and unrelaxed electronic excitations in KDP and ADP crystals are discussed.

show abstract

Section: Resultssupporting

confidence: 62%

Section: Resultsmentioning

confidence: 61%

Section: Resultsmentioning

confidence: 65%

Section: Resultsmentioning

confidence: 75%

“…Simultaneously, time-integrated PL spectra were recorded. The other experimental details were the same as reported by us earlier (Ogorodnikov et al, 2004).…”

Section: Methodsmentioning

confidence: 90%

See 3 more Smart Citations

Luminescence of the hydrogen bonded crystals

Огородников¹,

Kirm

Пустоваров³

2007

Radiation Measurements

View full text Add to dashboard Cite

show abstract

Optical studies of hydrogenbonded dielectrics TlH₂PO₄

Kawai¹,

Ohno²

2008

Phys. Status Solidi (c)

View full text Add to dashboard Cite

We have for the first time investigated optical properties of thallium dihydrogen phosphate TlH2PO4 (TDP) up to vacuum ultraviolet energy region at low temperature. The remarkable dispersion‐like structures due to the first exciton transitions are observed around 5.8 eV above the fundamental absorption edge at 5.2 eV. The origin of the first excitons in TDP is ascribed to the cationic transition from 6s2 to 6s 6p electronic states in Tl+ ions. In the higher energy region, characteristic peak structures appear at 15.6 and 16.7 eV. The peak structures are attributed to the core excitons based on the transitions from 5d106s2 to 5d96s26p states in Tl+ions. A broad luminescence band with a large Stokes shift is observed at 2.9 eV, stimulated efficiently at the first exciton transition region. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

show abstract