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RESEARCH PRODUCT
Luminescence of biexcitons in silver halide crystals
Donats MillersVladimir PankratovLarisa Grigorjevasubject
PhotoluminescenceSilver halideExcitonBinding energyBiophysicsGeneral ChemistryCondensed Matter PhysicsBiochemistryAtomic and Molecular Physics and Opticschemistry.chemical_compoundchemistryAbsorption edgeFrenkel defectAtomic physicsLuminescenceBiexcitondescription
Abstract As it is known from Urbach rule, free excitons defining the fundamental absorption edge in AgBr 1 − x Cl x (0 ⩽ x ⩽ 1). The process of primary Frenkel defect creation which involves free exciton states even in AgCl and biexciton creation in AgCl are discussed. The fast luminescence band at ≈3.0 eV observed in AgCl under high-density pulsed electron beam and laser excitation has been studied. It is shown that its intensity is a non-linear function of the excitation density. We suggest that the fast luminescence comes from biexcitons; binding energies of such biexcitons in AgBr 1 − x Cl x (0 ⩽ x ⩽ 1) are estimated.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1998-02-01 | Journal of Luminescence |