CAJ | 학술논문

为了考察Cu掺杂量对产物发光性能的影响，本文在PVA 溶液中制备出Cu掺杂ZnO纳米粉体的前驱体，经500℃煅烧3 h获得ZnO∶Cu纳米粉体。利用XRD、T EM 分析了产物的结构和形貌，并采用FS分析了Cu掺杂量对产物发光性能的影响。研究结果表明所制备的产物具有六角纤锌矿结构，C u的掺杂量不高于3∶100（摩尔比）时不影响产物的晶体结构；制得的粉体呈球形，大小均匀，分散性好，平均粒径为20～25 nm 。在以325 nm波长激发的室温PL光谱中可以观察到Cu掺杂显著地抑制了本征态ZnO粉体的带边发射，随着Cu的掺杂量的增加，在400～428 nm范围内出现较弱的蓝紫光发射，发射峰出现红移，且发射强度下降；在458 nm和486 nm处出现较强的蓝光发射，其中458 nm的蓝光发射尤为显著，发射强度随着Cu的掺杂量的增加而下降；由于Cu的掺杂也导致520 nm处的绿光发射减弱。
위료고찰Cu참잡량대산물발광성능적영향，본문재PVA 용액중제비출Cu참잡ZnO납미분체적전구체，경500℃단소3 h획득ZnO∶Cu납미분체。이용XRD、T EM 분석료산물적결구화형모，병채용FS분석료Cu참잡량대산물발광성능적영향。연구결과표명소제비적산물구유륙각섬자광결구，C u적참잡량불고우3∶100（마이비）시불영향산물적정체결구；제득적분체정구형，대소균균，분산성호，평균립경위20～25 nm 。재이325 nm파장격발적실온PL광보중가이관찰도Cu참잡현저지억제료본정태ZnO분체적대변발사，수착Cu적참잡량적증가，재400～428 nm범위내출현교약적람자광발사，발사봉출현홍이，차발사강도하강；재458 nm화486 nm처출현교강적람광발사，기중458 nm적람광발사우위현저，발사강도수착Cu적참잡량적증가이하강；유우Cu적참잡야도치520 nm처적록광발사감약。
The precursors of ZnO∶Cu nano powder were prepared in PVA aqueous solution .Then the products were obtained by calcining under 500 ℃ for 3h .The effect of doping dosage on the photoluminescence of the ZnO ∶Cu nano powder was investigated .The products were characterized by XRD ,TEM and Fluorescence spectrophotometer (FS ) .The results of XRD indicated that all the products had a crystal structure of hexagonal w urtzite .Small quantity of Cu doping had no effect on the structure of the products .The TEM result showed that the nano-powder was spherical with the uniform size of 20~25 nm and had good dispersibility .It was found in the PL spectra excited with 325 nm light that the NBE of eigenstate ZnO was restrained observably by Cu doping .As the doping dosage increased ,the violet-blue emission was observed at 400-428 nm weakly ,the spectral had a red shift and the emission intensity decreased slightly .Two strong blue emission peaks were also observed at 458 nm and 486 nm ,especially at the fomer .However the intensity of emission peak centered at 458 nm decreased slightly while the doping dosage increased .Furthermore ,as a result of Cu doping ,the green emission at 520 nm became weak obviously .