Observation of Mediated Cascade Energy Transfer in Europium-Doped ZnO Nanowalls by 1,10-Phenanthroline

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• 作者：Jung-Soo Kang ; Yong-Kwang Jeong ; Jun-Gill Kang ; Liyan Zhao ; Youngku Sohn ; Debabrata Pradhan ; K. T. Leung
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：January 29, 2015
• 年：2015
• 卷：119
• 期：4
• 页码：2142-2147
• 全文大小：358K
• ISSN：1932-7455

文摘

Embedding rare earth ions into a host material such as alkali halides, semiconductors, and metal oxides has been extensively studied, with the goal to improve performance in light emitting devices and biomedicine. Here, Europium-embedded ZnO nanowall structures have been achieved by a facile electrochemical deposition method. Upon Eu embedment, the nanowalls were found to become thicker and stacked. X-ray photoemission study revealed that Zn(OH)₂ was more dominant than ZnO near the surface and it confirmed that Eu(III) was uniformly distributed in the ZnO鈥揨n(OH)₂ core鈥搒hell structure. We also measured the photoluminescence spectra of as-grown, heat-treated and 1,10-phenanthroline surface-functionalized ZnO nanowalls samples, which led us to propose a unique cascade energy transfer model between ZnO, 1,10-phenanthroline, and Eu³⁺ ion.