Multicolor Depth-Resolved Cathodoluminescence from Eu-Doped SiOC Thin Films

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• 作者：Gabriele Bellocchi ; Filippo Fabbri ; Maria Miritello ; Fabio Iacona ; Giorgia Franz貌
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：August 26, 2015
• 年：2015
• 卷：7
• 期：33
• 页码：18201-18205
• 全文大小：278K
• ISSN：1944-8252

文摘

A very bright room-temperature cathodoluminescence (CL) signal, tunable in the visible range by changing the Eup>2+p> concentration, has been observed in Eu-doped SiOC films. Depth-resolved CL measurements demonstrate that a bilayer consisting of two SiOC films containing different Eu concentrations allows the continuous tuning of the Eup>2+p> emission from blue to green by changing the energy of the exciting electrons. Furthermore, the proper control at the nanoscale of the electron penetration depth allows to obtain a high-quality white light emission. The compatibility of SiOC films with Si technology opens the way to promising applications of Eu-based materials in lighting and display technologies.