Absorption bands in the absorption edge region of p-terphenyl crystals
β Scribed by K. Uchida; T. Segawa; Y. Takahashi
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 216 KB
- Volume
- 60-61
- Category
- Article
- ISSN
- 0022-2313
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π SIMILAR VOLUMES
The UV absorption spectrum of a TP smgle crystal IS measured between 297 and 77 K. The UV spectrum shifts to hyhcr encgy as the temperature falls. The temperature dependence of the UV absorption spectrum mdrcates that a disphcwe transltlon occurs rather than an order-disorder one III a TP crystal.
It has been found that higher excited states, populated by two-photon absorption, ionize with an effkiency which, in the energy range of 5.3-6.4 eV, is independent of the energy of the excitation. This behavior is similar to that observed in sequential twostep excitation (exciton photoionization) an