Enhanced photoluminescence and electrical properties of 0-3 type ZnO/Bi_3.6Eu_0.4Ti₃O₁₂ nanocomposite thin films

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• 作者：Xiaoye Zhou ; Ni Qin ; Guangheng Wu ; Dinghua Bao ; ^{stsbdh@mail.sysu.edu.cn}
• 关键词：A. Thin films ; B. Chemical synthesis ; D. Dielectric properties ; D. Ferroelectricity ; D. Luminescence
• 刊名：Materials Research Bulletin
• 出版年：2013
• 出版时间：April, 2013
• 年：2013
• 卷：48
• 期：4
• 页码：1397-1402
• 全文大小：1724 K

文摘

0-3 type ZnO/Bi_3.6Eu_0.4Ti₃O₁₂ (BEuT) nanocomposite films with ZnO nanopowders in BEuT host were prepared by chemical solution deposition. The effects of ZnO content on the structure, photoluminescence, and electrical properties of the films were investigated. The ZnO/BEuT molar ratio strongly affected the grain size and growth orientation of BEuT, dielectric and ferroelectric properties, as well as emission intensity. The nanocomposite films showed strong red emission peaks due to ⁵D₀ ¡ú ⁷F₁ and ⁵D₀ ¡ú ⁷F₂ transitions of Eu³⁺ ions. Good electrical properties with high dielectric constant of 480 (at 1 kHz) and large remanent polarization (2P_r) of 32 ¦ÌC/cm² were obtained for the nanocomposite films having a ZnO/BEuT molar ratio of 1:2. The mechanisms for enhanced photoluminescence and electric properties were discussed. The results suggest that the nanocomposite thin films are promising candidate materials for multifunctional optoelectronic devices.