摘要
As a newly discovered member of the ttmgstate famil3~ InWO4 hollow nanospheres with a monoclinic wolframite structure were synthesized successfully. The crystal phase of InWO4 was investigated via a combination of CASTEP geometric optimization and experimental simulation. InWO, has a space group of P2/c with two InWO, formula units per unit cell. The optimized cell dimensions are a = 5.16 A, b = 5.97 A, and c = 5.23 A, with a = 90°, β= 92.11°, 7 = 90°, giving a unit cell volume of 161.10 A^3, which is consistent with the experimental measurements. More importantly, InWO4 was a promising host material for different Ln^3＋ （Ln = Eu and Yb/Er） ions. For InWO4：Yb^3＋/Er^3＋ excited at 980 nm, transitions from the ^4G11/2 （384 nm）, ^2H9/2 （411 nm）, and ^4F7/2 （487 nm） levels to the ground state （^4I15/2） of Er^3＋ were observed. In addition to the aforementioned properties, the InWO4 hollow nanospheres can be used to improve the performance of dye-sensitized solar cells, which is chiefly attributed to their light scattering.
As a newly discovered member of the ttmgstate famil3~ InWO4 hollow nanospheres with a monoclinic wolframite structure were synthesized successfully. The crystal phase of InWO4 was investigated via a combination of CASTEP geometric optimization and experimental simulation. InWO, has a space group of P2/c with two InWO, formula units per unit cell. The optimized cell dimensions are a = 5.16 A, b = 5.97 A, and c = 5.23 A, with a = 90°, β= 92.11°, 7 = 90°, giving a unit cell volume of 161.10 A^3, which is consistent with the experimental measurements. More importantly, InWO4 was a promising host material for different Ln^3＋ （Ln = Eu and Yb/Er） ions. For InWO4：Yb^3＋/Er^3＋ excited at 980 nm, transitions from the ^4G11/2 （384 nm）, ^2H9/2 （411 nm）, and ^4F7/2 （487 nm） levels to the ground state （^4I15/2） of Er^3＋ were observed. In addition to the aforementioned properties, the InWO4 hollow nanospheres can be used to improve the performance of dye-sensitized solar cells, which is chiefly attributed to their light scattering.
