Abstract Due to the shielding effect of the outermost electronic layer 5s and 5p of rare earth, the near-infrared photoluminescence (PL) of Er3+ can not be easily affected by the external environment. However, we have regulated the near-infrared PL of Er3+ by changing temperature, which is ascribed to the phase transition of BaTiO3 from tetragonal to cubic phase and the presence of impurity. It also found that the redshift of wavelength in samples containing tetragonal phase BaTiO3 can reach 13 nm, which is never observed in other materials. The center wavelength shifts from 1530 nm to 1543 nm as the temperature rises from 20 to 200 °C. Moreover, the full width at half maximum (FWHM) of samples containing cubic phase has a growth of 6 nm (up to 85 nm) with increasing temperature. It indicated that temperature-induced phase transition can be an important method to modulate the PL of Er3+ in BaTiO3 with impurity.

中文翻译：

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BaTiO3:Er 中近红外光致发光的温度诱导调制

摘要 由于稀土最外层电子层5s和5p的屏蔽作用，Er3+的近红外光致发光(PL)不易受外界环境影响。然而，我们通过改变温度来调节 Er3+ 的近红外 PL，这归因于 BaTiO3 从四方相到立方相的相变以及杂质的存在。还发现含有四方相 BaTiO3 的样品的波长红移可达 13 nm，这在其他材料中是从未观察到的。随着温度从 20°C 升高到 200°C，中心波长从 1530 nm 移至 1543 nm。此外，随着温度升高，含有立方相的样品的半峰全宽 (FWHM) 增长了 6 nm（高达 85 nm）。