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基于无机材料的发光二极管(Inorganic Light-Emitting Diodes,简称ILED)由于效率高、寿命长、响应快、方向性好等优点被广泛应用于各个领域,例如固态发光照明、光学通信和光遗传学等.与柔性衬底相结合制备得到的柔性ILED具备了能够任意弯折、扭转或拉伸这些传统LED所没有的特性,可以实现与大脑、皮肤、器官等柔软组织的集成,这为以后临床需要的医疗检测和诊断提供了可能性.本文针对矩形形状柔性ILED的传热过程建立理论和有限元仿真模型,解析得到LED中的温度场分布及其随着LED尺寸的变化规律,所得的理论预测与有限元仿真结果吻合地较好.通过理论模型,建立了ILED无量纲温升的比例定律,并研究了柔性LED正常发光工作时的无量纲温升随无量纲几何和无量纲材料参数的变化规律,这些结果为矩形柔性LED的热管理提供了理论依据,对柔性LED的设计具有一定的指导意义.
Inorganic Light-Emitting Diodes (ILEDs) are widely used in various fields due to their high efficiency, long lifetime, fast response and good directivity, such as solid-state lighting, optical communication and optogenetics. The flexible ILEDs prepared in combination with a flexible substrate have the properties of traditional LEDs that can be bent, twisted or stretched arbitrarily, and can be integrated with soft tissue such as the brain, skin and organs for future clinical needs Medical detection and diagnosis.Aiming at the heat transfer process of rectangular flexible ILED, a theoretical and finite element simulation model is established, and the temperature field distribution in the LED and its variation with the LED size are analyzed. The theoretical predictions and The simulation results of the finite element method agree well with each other.The theoretic model is used to establish the law of proportionality of dimensionless temperature rise of ILED and the variation of dimensionless temperature rise with dimensionless geometry and dimensionless material parameters , These results provide a theoretical basis for the thermal management of rectangular flexible LEDs and have some guidance on the design of flexible LEDs Righteousness.