CAJ | 학술논문

采用高温固相法合成了 Er3+、Yb3+共掺杂的 NaYF4荧光粉。 XRD 测量数据表明合成的样品为纯相。测量了样品的激发谱和发射谱，证明377 nm 的紫外光通过量子剪裁的形式将能量传递给一个 Yb3+，发射一个975 nm 的红外光子，再从4 F9/2能级跃迁到基态发射一个红外光子。测量了377 nm 激发下，监测541 nm 的发光寿命曲线，计算得到最大的量子效率为126.35%。通过监测 Yb3+的975 nm 的近红外发射，证明了 Er3+的4 F7/2和2 H11/2能级通过下转换的形式将吸收的485 nm 和519 nm 的能量传递给 Yb3+。这种将 Er3+在可见光波段的多种光子能量传递给 Yb3+发射975 nm 的近红外光子的思想在以前的研究中从未被提出。
채용고온고상법합성료 Er3+、Yb3+공참잡적 NaYF4형광분。 XRD 측량수거표명합성적양품위순상。측량료양품적격발보화발사보，증명377 nm 적자외광통과양자전재적형식장능량전체급일개 Yb3+，발사일개975 nm 적홍외광자，재종4 F9/2능급약천도기태발사일개홍외광자。측량료377 nm 격발하，감측541 nm 적발광수명곡선，계산득도최대적양자효솔위126.35%。통과감측 Yb3+적975 nm 적근홍외발사，증명료 Er3+적4 F7/2화2 H11/2능급통과하전환적형식장흡수적485 nm 화519 nm 적능량전체급 Yb3+。저충장 Er3+재가견광파단적다충광자능량전체급 Yb3+발사975 nm 적근홍외광자적사상재이전적연구중종미피제출。
Er3 + , Yb3 + doped NaYF4 phosphors were prepared by high-temperature solid state meth-od. Structures of the samples were investigated by X-ray diffraction. The excitation and emission spectra of the phosphors were measured. The 377 nm photon jumped from 4 G11 / 2 to 4 F9 / 2 , and the energy was transferred to 2 F5 / 2 energy level of Yb3 + . A 975 nm near-infrared photon was thus ob-tained. Then, the photon in 4 F9 / 2 jumped to the ground state and emitted a 670 nm red photon. Fur-thermore, the luminescence decay curves of 541 nm emission excited by 377 nm were measured, and the quantum efficiencies were calculated. The maximum quantum efficiency was 126. 35% . By monitoring the 975 nm emission, the energy transfer from 4 F7 / 2 (485 nm) and 2 H11 / 2 (519 nm) of Er3 + to Yb3 + also occurred by down-conversion. This research has not been done before.