Henke Bastian, Keil Patrick, Paßlick Christian, Vogel Dirk, Rohwerder Michael, Wiegand Marie-Christin, Johnson Jacqueline A, Schweizer Stefan
Fraunhofer Center for Silicon Photovoltaics, Walter-Hülse-Str. 1, 06120 Halle (Saale), Germany ; Centre for Innovation Competence SiLi-nano®, Martin Luther University of Halle-Wittenberg, Karl-Freiherr-von-Fritsch-Str. 3, 06120 Halle (Saale), Germany.
Department of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, 40237 Düsseldorf, Germany.
Mater Res Soc Symp Proc. 2010;1262:7956536. doi: 10.1557/PROC-1262-W08-03.
The influence of adding InF as a reducing agent on the oxidation state of Eu in fluorochloro- (FCZ) and fluorobromozirconate (FBZ) glass ceramics was investigated using x-ray absorption near edge (XANES) and photoluminescence (PL) spectroscopy. For both materials, it was found that InF decreases the Eu-to-Eu ratio significantly. PL spectroscopy proved that an annealing step leads to the formation of Eu-doped BaCl and BaBr nanocrystals in the FCZ and FBZ glasses, respectively. In the case of FCZ glass ceramics the hexagonal phase of BaCl could be detected in indium-free and InF-doped ceramics, but only for InF containing FCZ glass ceramics a phase transition of the nanoparticles from hexagonal to orthorhombic structure is observed. For the FBZ glass ceramics, the hexagonal phase of BaBr can be formed with and without indium doping, but only in the indium-free case a phase transition to orthorhombic BaBr could be found.
利用X射线吸收近边（XANES）光谱和光致发光（PL）光谱研究了添加InF作为还原剂对氟氯锆酸盐（FCZ）和氟溴锆酸盐（FBZ）微晶玻璃中Eu氧化态的影响。对于这两种材料，发现InF显著降低了Eu与Eu的比例。PL光谱证明，退火步骤分别导致在FCZ和FBZ玻璃中形成Eu掺杂的BaCl和BaBr纳米晶体。在FCZ微晶玻璃的情况下，在无铟和掺杂InF的陶瓷中都可以检测到BaCl的六方相，但仅对于含InF的FCZ微晶玻璃，观察到纳米颗粒从六方结构到正交结构的相变。对于FBZ微晶玻璃，无论有无铟掺杂都可以形成BaBr的六方相，但仅在无铟的情况下可以发现向正交BaBr的相变。
