6533b839fe1ef96bd12a6daa
RESEARCH PRODUCT
BiI3 nanoclusters in melt-grown CdI2 crystals studied by optical absorption spectroscopy
Ivan BolestaVladimir PankratovV. LesivtsivS. VelgoshC. BalasubramanianI. RovetskyAnatoli I. PopovIvan Karbovnyksubject
Materials scienceAbsorption spectroscopyExcitonAtmospheric temperature rangeCondensed Matter PhysicsMolecular physicsElectronic Optical and Magnetic MaterialsNanoclustersQuantum dotExcited stateElectrical and Electronic EngineeringAtomic physicsSpectroscopyAbsorption (electromagnetic radiation)description
Optical absorption spectroscopy of CdI2–BiI3 layered crystals has been performed in the temperature range of 77–300 K. The main absorption, observed in these crystals at 2.59 eV is related to quantum confined exciton absorption of bimolecular BiI3 cluster. Low energy absorption peaks at 2.38 eV, 2.06 eV and 1.94 eV can be tentatively assigned to larger clusters composed of 4, 6 or more BiI3 molecules. In ultra-thin samples of CdI2–BiI3 several bands at 2.84 eV, 3.03 eV and 3.27 eV were observed which are ascribed to higher excited states of the excitons in bimolecular BiI3 cluster.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-03-01 | Physica B: Condensed Matter |