12037-79-5Relevant articles and documents
Triplet-to-singlet conversion in the exciton system in β-ZnP2 - Anti-Stokes exciton luminescence
Nakamura, Kaizo,Shigoku, Minoru,Kondo, Kanji,Arimoto, Osamu
, p. 1890 - 1893 (1998)
A new type of experiment was performed to investigate the effective nonradiative process causing the fast decay of the forbidden 1s triplet exciton luminescence with polarization E//b in β-ZnP2. Excitation spectra of anti-Stokes 1s singlet exciton luminescence with E//c have been measured by varying the excitation energy with E//b around the 1s triplet exciton absorption peak which is located about 2 meV below the singlet exciton luminescence. A sharp peak of excitation efficiency has been confirmed at the triplet exciton resonance for the first time. Temperature dependence of the excitation peak is in accordance with the thermal behavior of the singlet exciton polariton luminescence both from lower- and upper-branches. This anti-Stokes acoustic phonon scattering of triplet exciton into singlet states is one of the main causes of the short lifetime of triplet exciton in β-ZnP2. Spin flip mechanism is briefly discussed.
Two-temperature synthesis of ZnGeP2
Verozubova,Gribenyukov,Mironov
, p. 1040 - 1045 (2007)
We describe a modified two-temperature process for reproducible high-volume (up to 500 g) synthesis of the nonlinear-optical semiconductor ZnGeP 2, which enables the preparation of nominally stoichiometric material. The major reaction intermediates in the two-temperature ZnGeP 2 synthesis are ZnP2, Zn3P2, GeP, and Ge. Using x-ray diffraction, we refined the interplanar spacings in the tetragonal structure of ZnGeP2 and fcc structure of GeP and indexed peaks missing in the PDF cards 33-1471 (ZnGeP2) and 21-353 (GeP).
Kaenel, H. v.,Hauger, R.,Wachter, P.
, p. 619 - 622 (1982)
Two-photon absorption into excited states of excitonic molecules and their inelastic scattering in ZnP2
Dmitruk, I.,Goto, T.,Kasuya, A.,Yanchuk, Z.
, p. 1 - 6 (2008/10/08)
Excited states of excitonic molecules have been observed by the direct method of giant two-photon absorption in a monoclinic ZnP2 single crystal. Their origin and comparison with theoretical expectations are discussed. Photoluminescence of thermalized and nonthermalized cold excitonic molecules was studied under resonant two-photon excitation into their ground and excited states. An alternative mechanism of inelastic scattering of excitonic molecules is suggested.