有机发光二极管（OLED）发光效率很大程度上受到器件中高折射率材料（ITO/有机物）对导波光能量的制约。

The extraction efficiency of organic light-emitting diode(OLED) is restrained by the high fraction of energy of the guided wave in the high-index materials(ITO/organic).

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后来开发出荧光涂料，其特性是在明亮环境时，吸收并储存光能，在黑暗环境，释放能量而发光。(注：有的荧光材料还因温差而吸收能量)。

Then came fluorescent paints that glowed in the dark by releasing light energy stored while the surrounding light was bright.

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后来开发出荧光涂料，其特性是在明亮环境时，吸收并储存光能，在黑暗环境，释放能量而发光。(注：有的荧光材料还因温差而吸收能量)。

Then came fluorescent paints that glowed in the dark by releasing light energy stored while the surrounding light was bright.

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