Surface Plasmon Enhanced ZnO-Based Light-Emitting Devices
Zinc oxide (ZnO),with a direct band gap of 3.37 eV and a large exciton binding energy of 60meV,is a promising candidate for ultraviolet light-emitting devices (LEDs).Recently,ZnO based homojunction and heterojunction structured UV LEDs have been extensively reported.Nevertheless,the performance of the LEDs is still far below expectation.Surface plasmons (SPs)are local collective oscillations of electrons at interfaces between metal nanoparticles (hiPs) and a dielectric matrix,and the resonant excitation of SPs can lead to selective photon absorption and enhancement of local electromagnetic fields near the metal NPs by several orders of magnitude.Therefore,SPs has been extensively employed to enhance the emission of light-emitting materials and devices.There have been quite a few reports on SPs enhanced photoluminescence of ZnO-based materials,while for surface plasmon enhanced ZnO-based electroluminescence,only a few reports can be found,and they are all realized in ZnO heterojunctions.It is accepted that for efficient luminescence,homojunction is almost indispensible in many cases.Therefore,it will be of greater significance and importance if the luminescence of ZnO-based homojunction can be enhanced by SPs.none report can be found on this subject up to date.
C.X.Shan H.Shen Q.Qian J.S.Liu D.Z.Shen
State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
国内会议
开封
英文
331-331
2012-11-07（万方平台首次上网日期，不代表论文的发表时间）