High refractive index structured coating for efficient light extraction from LEDs and pcLEDs

The present specification discloses LEDs, pcLEDs, and arrays of LEDs or pcLEDs wherein the LEDs or pcLEDs include a structured high refractive index coating on the light output surface that improves light extraction from the device through the light output surface. The coating is additionally formed rather than by a subtraction process that removes material from the surface, and thus can avoid the disadvantages associated with the subtraction process. 本说明书公开了LED、pcLED和LED或pcLED的阵列，其中LED或pcLED包括在光输出表面上的结构化的高折射率涂层，其改善了来自器件通过光输出表面的光提取。涂层是附加地形成的，而不是通过从表面移除材料的减法工艺，并且因此可以避免与减法工艺相关联的缺点。