A double-potential-well model is proposed to describe the core-shell thickness-dependent photoluminescence peaks and energy relaxations in semiconductor quantum dots (QDs). The surface effect plays an important role i...A double-potential-well model is proposed to describe the core-shell thickness-dependent photoluminescence peaks and energy relaxations in semiconductor quantum dots (QDs). The surface effect plays an important role in the formation of new states-polaronic states around the surface of QDs. The polaronic states formed emit light due to the strong interaction between the core state (confined state) and the surface state with an enhanced participation of the size effect.展开更多
The carbon-nitride thin films were deposited on the(100)oriented single-crystai KC1 wafers at ambient temperatures by using rf-plasma sputtering.The IR spectrum showed that the Ulins contained carbqn-nitnde bonds.The ...The carbon-nitride thin films were deposited on the(100)oriented single-crystai KC1 wafers at ambient temperatures by using rf-plasma sputtering.The IR spectrum showed that the Ulins contained carbqn-nitnde bonds.The transmission electron microscopy(TEM)and x-ray diffraction(XRD)measurements indicated the existence of predicted polycrystalline P-C_(3)N_(4) Ulins on the KC1(100)wafers.And the TEM and XRD measured lattice spacings well match the calculated data.展开更多
基金Supported by the Bairen Project of the Chinese Academy of Sciences.
文摘A double-potential-well model is proposed to describe the core-shell thickness-dependent photoluminescence peaks and energy relaxations in semiconductor quantum dots (QDs). The surface effect plays an important role in the formation of new states-polaronic states around the surface of QDs. The polaronic states formed emit light due to the strong interaction between the core state (confined state) and the surface state with an enhanced participation of the size effect.
文摘The carbon-nitride thin films were deposited on the(100)oriented single-crystai KC1 wafers at ambient temperatures by using rf-plasma sputtering.The IR spectrum showed that the Ulins contained carbqn-nitnde bonds.The transmission electron microscopy(TEM)and x-ray diffraction(XRD)measurements indicated the existence of predicted polycrystalline P-C_(3)N_(4) Ulins on the KC1(100)wafers.And the TEM and XRD measured lattice spacings well match the calculated data.
