Abstract

In this Letter, we experimentally study the temperature dependence of the thermal radiation spectra of an Al₂O₃ : Ti³⁺ single crystal in the visible and near-infrared regions of the spectrum under laser-thermal heating. The thermal spectra of Al₂O₃ : Ti³⁺ in the temperature range of T = 330–900 K were found to differ significantly from the blackbody radiation spectrum and to be selective with a maximum at λ ≈ 1060 nm. The conversion of thermal energy into electrical energy due to the photovoltaic conversion of the selective radiation of a heated Al₂O₃ : Ti³⁺ single crystal by silicon photodiodes of the spectrometer receiving line was demonstrated. The possibility of applying the effect in thermovoltaic electric generators is discussed.

中文翻译：

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激光热加热下Al 2 O 3：Ti 3+的选择性辐射光谱

摘要

在这封信中，我们通过实验研究了激光加热下Al ₂ O ₃：Ti ³⁺单晶在光谱的可见光和近红外区域的热辐射光谱的温度依赖性。发现在T = 330–900 K的温度范围内，Al ₂ O ₃：Ti ³⁺的热光谱与黑体辐射光谱明显不同，并且在λ≈1060 nm处具有最大选择性。通过加热的Al ₂ O ₃：Ti ³⁺的选择性辐射的光电转换，将热能转换为电能用分光计接收线的硅光电二极管对单晶进行了说明。讨论了将这种效应应用到热电发电机中的可能性。