A facile pathway for solid-state material luminescence enhancement is proposed here by coating graphene on the surface of luminescent material. Ln³⁺ (Yb³⁺/Er³⁺)-doped germanium tellurite glasses are prepared by conventional melting and quenching method. With the excitation of 980 nm laser diode, the photo-luminescence intensities of the graphene-coated and uncoated glass samples are measured with different incidence angle of excitation light. When the incidence angle is less than 15°, luminescence enhancement can be observed in the coated samples compared with uncoated one. The insight for the enhancement is also discussed.

中文翻译：

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通过涂石墨烯增强掺Ln 3+（Yb 3+ / Er 3+）的锗亚碲酸盐玻璃的近红外发光

通过在发光材料的表面涂覆石墨烯，提出了一种用于增强固态材料发光的简便途径。掺Ln ³⁺（Yb ³⁺ / Er ³⁺）的锗亚碲酸盐玻璃是通过常规的熔化和淬火方法制备的。通过980 nm激光二极管的激发，可以在不同的激发光入射角下测量石墨烯涂层和未涂层​​玻璃样品的光致发光强度。当入射角小于15°时，与未涂布样品相比，在涂布样品中可以观察到发光增强。还讨论了增强功能的见解。