TY - JOUR
T1 - Yb3+ Doping Monoclinic Lu2WO6
T2 - Near-Infrared Emission and Energy-Transfer Luminescence Mechanism
AU - Zhang, Yongyang
AU - Xin, Jiandi
AU - Zheng, Huibing
AU - Zhao, Zhengui
AU - Zhang, Junying
AU - Yang, Yanmin
AU - Zheng, Shukai
AU - Zhao, Rui
AU - Ding, Bangfu
N1 - Publisher Copyright:
© 2018 American Chemical Society.
PY - 2018/9/20
Y1 - 2018/9/20
N2 - Upon 300 nm excitation, monoclinic Lu2-xYbxWO6 (0 ≤ x ≤ 0.3) phosphors displayed concentration-dependent visible (vis) and near-infrared (NIR) luminescence with the strongest peak centers at about 450 and 970 nm. Rietveld refinement indicated that Yb occupancy numbers in three Lu sites depended closely on the impurity concentration. The scanning electron microscopy and transmission electron microscopy characterizations showed that all of the samples were aggregates of particles with different shapes and sizes. Through hybridized density functional theory calculation, this NIR emission was proposed to originate from electron transition in three unoccupied spin down 4f state of Yb3+ with different energy positions in the forbidden band. Energy transfer from WO6 6- to Yb3+ was only a single-step transfer process according to a lifetime spectra and theoretical result. Therefore, Lu2-xYbxWO6 can be used as light-light conversion layer in solar cell, and the first-principles calculation successfully explained the intrinsic nature of luminescence phenomenon.
AB - Upon 300 nm excitation, monoclinic Lu2-xYbxWO6 (0 ≤ x ≤ 0.3) phosphors displayed concentration-dependent visible (vis) and near-infrared (NIR) luminescence with the strongest peak centers at about 450 and 970 nm. Rietveld refinement indicated that Yb occupancy numbers in three Lu sites depended closely on the impurity concentration. The scanning electron microscopy and transmission electron microscopy characterizations showed that all of the samples were aggregates of particles with different shapes and sizes. Through hybridized density functional theory calculation, this NIR emission was proposed to originate from electron transition in three unoccupied spin down 4f state of Yb3+ with different energy positions in the forbidden band. Energy transfer from WO6 6- to Yb3+ was only a single-step transfer process according to a lifetime spectra and theoretical result. Therefore, Lu2-xYbxWO6 can be used as light-light conversion layer in solar cell, and the first-principles calculation successfully explained the intrinsic nature of luminescence phenomenon.
UR - https://www.scopus.com/pages/publications/85053303993
U2 - 10.1021/acs.jpcc.8b06636
DO - 10.1021/acs.jpcc.8b06636
M3 - 文章
AN - SCOPUS:85053303993
SN - 1932-7447
VL - 122
SP - 21607
EP - 21616
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 37
ER -