%0 Journal Article %1 siomadebela2016plasmon %A Sioma Debela, Teshome Senbeta %A Mesfin, Belayneh %D 2016 %E AIRCC, %J International Journal of Recent advances in Physics (IJRAP) %K tag %N 2 %P 1-8 %T PLASMON ENHANCED INTERNAL QUANTUM EFFICIENCY OF CdSe/ZnS QUANTUM DOTS %U http://wireilla.com/physics/ijrap/papers/5216ijrap02.pdf %V 5 %X The effects of surface plasmon oscillations on the radiative recombination rate and internal quantum efficiency of silver coated CdSe/ZnS quantum dots imbedded in quartz matrix is studied theoretically and numerically. The analysis is carried out by introducing the local field enhancement factor for the description of the dielectric function of the quantum dots together with the modified Drude model for the metal-coat that takes into account the effects of interband transitions and the size dependent damping parameter. It is found out that the internal quantum efficiency of photoluminescence emission of the metalcoated CdSe/ZnS quantum dots is enhanced by about 5-folds compared with the quantum dots without metal-coat. Moreover, increasing the metal fraction of the coated CdSe/ZnS quantum dots from 0.80 to 0.92 results in a significant increase of the intensity that is accompanied by a blue-shift of the quantum efficiency curves. The results obtained can be utilized in the design and fabrication of optoelectronic devices that require high intensity of photoluminescence emission.

@article{siomadebela2016plasmon, abstract = {The effects of surface plasmon oscillations on the radiative recombination rate and internal quantum efficiency of silver coated CdSe/ZnS quantum dots imbedded in quartz matrix is studied theoretically and numerically. The analysis is carried out by introducing the local field enhancement factor for the description of the dielectric function of the quantum dots together with the modified Drude model for the metal-coat that takes into account the effects of interband transitions and the size dependent damping parameter. It is found out that the internal quantum efficiency of photoluminescence emission of the metalcoated CdSe/ZnS quantum dots is enhanced by about 5-folds compared with the quantum dots without metal-coat. Moreover, increasing the metal fraction of the coated CdSe/ZnS quantum dots from 0.80 to 0.92 results in a significant increase of the intensity that is accompanied by a blue-shift of the quantum efficiency curves. The results obtained can be utilized in the design and fabrication of optoelectronic devices that require high intensity of photoluminescence emission.}, added-at = {2018-02-07T07:37:36.000+0100}, author = {Sioma Debela, Teshome Senbeta and Mesfin, Belayneh}, biburl = {https://www.bibsonomy.org/bibtex/2c318dc14404df6e91fe3fb0a1e08c31d/johnkenadi1985.}, editor = {AIRCC}, interhash = {34753444fa39906dfd670894b1e59ce5}, intrahash = {c318dc14404df6e91fe3fb0a1e08c31d}, journal = {International Journal of Recent advances in Physics (IJRAP)}, keywords = {tag}, month = {05/2016}, number = 2, pages = {1-8}, timestamp = {2018-02-07T07:37:36.000+0100}, title = {PLASMON ENHANCED INTERNAL QUANTUM EFFICIENCY OF CdSe/ZnS QUANTUM DOTS}, url = {http://wireilla.com/physics/ijrap/papers/5216ijrap02.pdf}, volume = 5, year = 2016 }