当前位置: X-MOL 学术Inorg. Chem. Commun. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Improved photoluminescence properties of red YVO4: Eu3+ thin films deposited by laser ablation: Influence of deposition time
Inorganic Chemistry Communications ( IF 3.8 ) Pub Date : 2021-08-30 , DOI: 10.1016/j.inoche.2021.108876
F.B. Dejene 1
Affiliation  

YVO4:Eu3+ thin films were deposited at room temperature, using pulse laser deposition with deposition time ranging from 30, 45, and 60 min. The oxygen deposition background pressure was kept constant at 5 mTorr. XRD analysis confirmed that samples were tetragonal in shape. An improvement in crystallinity of the films was observed when deposition time was increased. The estimated crystallite size increased from 52 to 69 nm as the deposition time increased from 30 to 60 min, respectively. According to SEM images, particles agglomerated as deposition time increased, and a homogeneous surface was observed for a film deposited at 45 min. A rough surface with larger particles was observed for the sample deposited at 60 min. PL emission spectra of YVO4:Eu3+ showed that the prominent emission peaks were due to 5Dj7Fj transitions of Eu3+. The strongest red emission peak at 618 nm is due to transition 5D07F2. An increase in deposition time showed an improvement in the PL intensity of the thin films.



中文翻译:

改进的红色 YVO4 的光致发光特性:通过激光烧蚀沉积的 Eu3+ 薄膜:沉积时间的影响

YVO4:Eu 3+薄膜在室温下沉积,使用脉冲激光沉积,沉积时间为 30、45 和 60 分钟。氧沉积背景压力保持恒定在 5 mTorr。XRD 分析证实样品的形状为四边形。当沉积时间增加时,观察到薄膜结晶度的改善。随着沉积时间分别从 30 分钟增加到 60 分钟,估计的微晶尺寸从 52 纳米增加到 69 纳米。根据 SEM 图像,颗粒随着沉积时间的增加而聚集,并且对于在 45 分钟沉积的薄膜观察到均匀的表面。对于在 60 分钟沉积的样品,观察到具有较大颗粒的粗糙表面。YVO 4 :Eu 3+ 的PL发射光谱表明突出的发射峰是由于Eu 3+ 的5 D j7 F j跃迁造成的。618 nm 处最强的红色发射峰是由于跃迁5 D 07 F 2。沉积时间的增加表明薄膜的 PL 强度有所提高。

更新日期:2021-08-30
down
wechat
bug