In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 32, No. 5B ( 1993-05-01), p. L734-
Abstract:
This letter reports the detection of thermal excitation of dyes doped in an amorphous material by photochemical hole-burning. Our sample is sulfonated tetraphenylporphin (TPPS) doped in poly (vinyl alcohol) (PVA) at 4.2 K, 15 K and 20 K. We measured the extent of laser-induced hole filling (LIHF) for holes, using the irradiation of longer-wavelength light as a function of wavelength difference between the filled holes and irradiation light. Our results for wavelength difference and temperature dependence of the extent of LIHF can be explained by a cage model: the TPPS dye in PVA is confined to a rigid square well potential ≈0.40 Å long. The energy of the TPPS in the electronic ground state is thermally distributed in the well. The validity of the cage model and the possibilities of more appropriate models are also discussed.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.32.L734
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
1993
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
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