CAJ | 학술논문

利用球磨法制备了Na源及其比例不同的Tm3+/Yb3+掺杂的NaGdF4发光粉,并对部分样品高温处理。讨论了Na源及其比例的不同和高温对样品上转换发光的影响。结果表明在所选比例中,当各离子的量比n( RE)∶n( Na)∶n( F)=1∶1∶4时,样品在高温处理前后的上转换发光均为最强。高温处理改变了上转换荧光发射的比例,可见光区的发射强度有大幅增加。 XRD测试结果表明,Tm3+和Yb3+掺入到了NaGdF4的晶格内,高温处理改变了部分样品的结晶度和相态,从而导致可见光的发射强度大幅增加。 HRTEM图像显示样品中有α相与β相NaGdF4共存。对上转换发光和顺磁性质之间相互影响的研究结果表明,980 nm红外激光的激发对样品的顺磁性基本没有影响,而变化磁场的存在对上转换发光有负面的影响。
이용구마법제비료Na원급기비례불동적Tm3+/Yb3+참잡적NaGdF4발광분,병대부분양품고온처리。토론료Na원급기비례적불동화고온대양품상전환발광적영향。결과표명재소선비례중,당각리자적량비n( RE)∶n( Na)∶n( F)=1∶1∶4시,양품재고온처리전후적상전환발광균위최강。고온처리개변료상전환형광발사적비례,가견광구적발사강도유대폭증가。 XRD측시결과표명,Tm3+화Yb3+참입도료NaGdF4적정격내,고온처리개변료부분양품적결정도화상태,종이도치가견광적발사강도대폭증가。 HRTEM도상현시양품중유α상여β상NaGdF4공존。대상전환발광화순자성질지간상호영향적연구결과표명,980 nm홍외격광적격발대양품적순자성기본몰유영향,이변화자장적존재대상전환발광유부면적영향。
Tm3+/Yb3+ doped NaGdF4 luminescent powder with different Na sources and ion ratios were synthesized by ball milling method, and part of samples were treated under high temperature. In all selected molar ratios of the ions, n( RE)∶n( Na)∶n( F) =1∶1∶4 is the best. The up-conver-sion luminescence of the samples with this ratio is the strongest before and after high temperature treatment. After high temperature treatment, the intensity of visible light emission increases signifi-cantly. XRD results show that Tm3+ and Yb3+ have doped in the lattices of NaGdF4 . After high tem-perature treatment, part ofβ-phase and amorphous phase turn toα-phase, which results in the crys-tallinity improving. HRTEM image also shows thatα-andβ-phase coexist in the sample. The exci-tation of 980 nm laser hardly has effect on the paramagnetism of the samples, but the changing mag-netic field has negative effect on the up-conversion luminescence of the samples.