title: Intense ultra-broadband down-conversion in co-doped oxide glass by multipolar interaction process.
abstract: We report that Eu(2+) can be an efficient sensitizer for Yb(3+) and a broadband absorber for blue solar spectra in the host of oxide glass. The greenish 4f → 5d transition of Eu(2+) and the characteristic near-infrared emission of Yb(3+) were observed, with the blue-light of xenon lamp excitation. The 5d energy can be adjusted by the host and the energy transfer efficiency can be enhanced. The quantum efficiency is up to 163.8%. Given the broad excitation band, high absorption coefficient and excellent mechanical, thermal and chemical stability, this system can be useful as down-conversion layer for solar cells.
authors.affiliation: Huazhong University of Science and Technology, College of Optoelectronic Science and Engineering, Wuhan National Laboratory for Optoelectronics, Wuhan 430074, China.
authors.forename: Zijun
authors.initials: Z
authors.lastname: Liu
authors.forename: Luyun
authors.initials: L
authors.lastname: Yang
authors.forename: Nengli
authors.initials: N
authors.lastname: Dai
authors.forename: Yingbo
authors.initials: Y
authors.lastname: Chu
authors.forename: Qiaoqiao
authors.initials: Q
authors.lastname: Chen
authors.forename: Jinyan
authors.initials: J
authors.lastname: Li
mesh_terms: D000042:Absorption / Q000528:radiation effects; D005063:Europium / Q000737:chemistry* / Q000528:radiation effects; D005898:Glass / Q000737:chemistry* / Q000528:radiation effects; D008027:Light; D008422:Materials Testing; D010087:Oxides / Q000737:chemistry* / Q000528:radiation effects; D012031:Refractometry / Q000379:methods*; D015018:Ytterbium / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D010087:Oxides; D005063:Europium; D015018:Ytterbium