title: Improvement of light extraction of LYSO scintillator by using a combination of self-assembly of nanospheres and atomic layer deposition.
abstract: The self-assembled monolayer periodic array of polystyrene spheres conformally coated with TiO₂ layer using atomic layer deposition is designed to obtain a further enhancement of light extraction for LYSO scintillator. The maximum enhancement is 149% for the sample with polystyrene spheres conformally coated with TiO₂ layer, while the enhancement is only 76% for the sample with only polystyrene spheres. Such further enhancement could be contributed from the additional modes forming by TiO₂ layer due to its high refractive index, which can be approved by the simulation of electric field distribution. The experimental results are agreement with the simulated results. Furthermore, the prepared structured layer exhibits an excellent combination with the surface of scintillator, which is in favor of the practical application. Therefore, it is safely concluded that the combination of self-assembly method and atomic layer deposition is a promising approach to obtain a significant enhancement of light extraction for a large area. This method can be extended to many other luminescent materials and devices.
authors.forename: Zhichao
authors.initials: Z
authors.lastname: Zhu
authors.forename: Bo
authors.initials: B
authors.lastname: Liu
authors.forename: Haifeng
authors.initials: H
authors.lastname: Zhang
authors.forename: Weina
authors.initials: W
authors.lastname: Ren
authors.forename: Chuanwei
authors.initials: C
authors.lastname: Cheng
authors.forename: Shuang
authors.initials: S
authors.lastname: Wu
authors.forename: Mu
authors.initials: M
authors.lastname: Gu
authors.forename: Hong
authors.initials: H
authors.lastname: Chen