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Temperature shift of the optical gap in some PbO?ZnO?P2O5 glasses

Autoři: Schwarz Jiří | Tichá Helena | Tichý Ladislav

Rok: 2007

Druh publikace: článek v odborném periodiku

Název zdroje: Materials Letters

Název nakladatele: Elsevier Science BV

Místo vydání: Amsterdam

Strana od-do: 520-522

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
cze	Teplotní posun optické šířky zakázaného pásu skel systému PbO?ZnO?P2O5	The optical gap (Eg) between 4.54 eV?4.88 eV at room temperature was determined for PbO?ZnO?P2O5 glasses with the formal content of P2O5 in the region of 30 to 50 mol% and with the formal content of PbO in the region of 50 to 45 mol%, respectively. The temperature (T) dependence of the optical gap (Eg(T)) in the region 80<T[K]<600 was determined, and an electron?phonon interaction is suggested to be a major contribution to the temperature shift of the optical gap. In the temperature region of 300?600 K, the Eg(T) dependence can be approximated by a simple linear relation with the temperature coefficient (γ) of the optical gap in the region 6.04≤γ×10000 [eV/K]≤7.39.
eng	Temperature shift of the optical gap in some PbO?ZnO?P2O5 glasses	The optical gap (Eg) between 4.54 eV?4.88 eV at room temperature was determined for PbO?ZnO?P2O5 glasses with the formal content of P2O5 in the region of 30 to 50 mol% and with the formal content of PbO in the region of 50 to 45 mol%, respectively. The temperature (T) dependence of the optical gap (Eg(T)) in the region 80<T[K]<600 was determined, and an electron?phonon interaction is suggested to be a major contribution to the temperature shift of the optical gap. In the temperature region of 300?600 K, the Eg(T) dependence can be approximated by a simple linear relation with the temperature coefficient (γ) of the optical gap in the region 6.04≤γ×10000 [eV/K]≤7.39.	Temperature shift of the optical gap P2O5 glasses

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