电场极化(1-x)NaBiTiO-xNaKNbO:0.002Er 光致变色陶瓷中的可调谐发光对比度。
Tunable Luminescence Contrast in Photochromic Ceramics (1 - x)NaBiTiO- xNaKNbO:0.002Er by an Electric Field Poling.
机构信息
Department of Microelectronic Science and Engineering, School of Science , Ningbo University , Ningbo 315211 , China.
出版信息
ACS Appl Mater Interfaces. 2018 Dec 5;10(48):41525-41534. doi: 10.1021/acsami.8b15784. Epub 2018 Nov 26.
A binary solid solution of Er-doped (1 - x)NaBiTiO- xKNaNbO ( x = 0.02, 0.04, 0.06, 0.08, 0.10, 0.12) ferroelectric ceramics has been developed, and a reversible photochromic (PC) reaction and its associated luminescence modulation are realized via alternating the 405 nm light irradiation and thermal stimulation (200 °C). The basic crystal structure, domain structure, ferroelectricity, and dielectric behavior of the ceramics were measured. A moderate luminescence contrast Δ R over 50% is obtained in the fresh samples. Meanwhile, a greatly enhanced luminescence contrast Δ R is obtained via an electric poling for compositions x = 0.02, 0.04, 0.06. For example, Δ R is promoted from 53.4 to 85.3% for x = 0.02. However, the luminescence contrast Δ R of compositions x = 0.08, 0.10, 0.12 is depressed after poling. The mechanisms of enhanced PC reaction and luminescence contrast Δ R are discussed and proposed. The present study may open a window for enhancing the PC reaction.
掺铒（1 - x）NaBiTiO- xKNaNbO（x = 0.02、0.04、0.06、0.08、0.10、0.12）二元固溶体铁电陶瓷已经研制成功，通过交替 405nm 光辐照和热刺激（200°C）实现了可逆光致变色（PC）反应及其相关的发光调制。测量了陶瓷的基本晶体结构、畴结构、铁电性和介电行为。在新鲜样品中获得了超过 50%的中等发光对比度ΔR。同时，通过对 x = 0.02、0.04、0.06 等组成进行电极化，可以获得更大的发光对比度ΔR。例如，对于 x = 0.02，ΔR 从 53.4%提高到 85.3%。然而，x = 0.08、0.10、0.12 组成的发光对比度ΔR 在极化后会降低。讨论并提出了增强 PC 反应和发光对比度ΔR 的机制。本研究可能为增强 PC 反应开辟了一个窗口。
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