发光学报
髮光學報
발광학보
Chinese Journal of Luminescence
2015年
12期
1363-1369
,共7页
乔倩%单崇新%刘娟意%陶丽芳%王瑞%张存喜%李炳辉%申德振
喬倩%單崇新%劉娟意%陶麗芳%王瑞%張存喜%李炳輝%申德振
교천%단숭신%류연의%도려방%왕서%장존희%리병휘%신덕진
局域表面等离子体共振%发光二极管%银纳米粒子%电致发光
跼域錶麵等離子體共振%髮光二極管%銀納米粒子%電緻髮光
국역표면등리자체공진%발광이겁관%은납미입자%전치발광
localized surface plasmon resonance%light-emitting diodes%sliver nanoparticles%electroluminescence
采用分子束外延法制备不同密度的银纳米粒子( Ag NPs)修饰的局域表面等离子体共振增强n-ZnO/i-ZnO/MgO/p-GaN 异质结发光二极管( LEDs),并对其电学及光学性质进行表征。结果显示:LEDs中引入适当浓度的Ag NPs有利于Ag NPs局域表面等离子体激元与ZnO激子相耦合,可以显著提高器件的电致发光性能;随着Ag NPs浓度的增加,LEDs发光增强倍数先增大后减小,分析认为这是Ag NPs局域表面等离子体共振耦合增强过程和Ag NPs的消光过程两者之间相互博弈而导致的结果。
採用分子束外延法製備不同密度的銀納米粒子( Ag NPs)脩飾的跼域錶麵等離子體共振增彊n-ZnO/i-ZnO/MgO/p-GaN 異質結髮光二極管( LEDs),併對其電學及光學性質進行錶徵。結果顯示:LEDs中引入適噹濃度的Ag NPs有利于Ag NPs跼域錶麵等離子體激元與ZnO激子相耦閤,可以顯著提高器件的電緻髮光性能;隨著Ag NPs濃度的增加,LEDs髮光增彊倍數先增大後減小,分析認為這是Ag NPs跼域錶麵等離子體共振耦閤增彊過程和Ag NPs的消光過程兩者之間相互博弈而導緻的結果。
채용분자속외연법제비불동밀도적은납미입자( Ag NPs)수식적국역표면등리자체공진증강n-ZnO/i-ZnO/MgO/p-GaN 이질결발광이겁관( LEDs),병대기전학급광학성질진행표정。결과현시:LEDs중인입괄당농도적Ag NPs유리우Ag NPs국역표면등리자체격원여ZnO격자상우합,가이현저제고기건적전치발광성능;수착Ag NPs농도적증가,LEDs발광증강배수선증대후감소,분석인위저시Ag NPs국역표면등리자체공진우합증강과정화Ag NPs적소광과정량자지간상호박혁이도치적결과。
Localized surface plasmon resonance enhanced n-ZnO/i-ZnO/MgO/p-GaN heterostruc-ture light-emitting diodes ( LEDs) with different sliver nanoparticles ( Ag NPs) density were fabrica-ted using molecular-beam epitaxy technique. It is found that the introduction of Ag NPs with suitable density is favorable for the effective resonant coupling between excitons in ZnO and the localized sur-face plasmons of Ag NPs, and thereby significantly improves the electroluminescence ( EL) perform-ance of the device. Note that the enhancement ratio increases firstly with the Ag NPs density and then decreases, and the variation is believed to be resulted from balance between the enhancement caused by the resonant coupling between the excitons in ZnO and the localized surface plasmons of Ag NPs and the extinction of the emitted photons by the Ag NPs.