OLED Panel: How it works?

Popular Science最近刊出一份精緻的OLED面板運作圖組，請點小圖見大圖（資料來源：Popular Science Special Issue - How It Works, P70-71）。網路上可以找到很多OLED structure的圖解，但這組圖實在很炫，所以特別挑出來讓大家看看。HTML版本在此： The Thinnest, Most Colorful TV Yet。

左邊的圖解炫歸炫，但是如果要比較清楚了解OLED發光原理，建議看HowStuffWorks提供的文字與圖解（點小圖見大圖）。

1. The battery or power supply of the device containing the OLED applies a voltage across the OLED.
2. An electrical current flows from the cathode to the anode through the organic layers (an electrical current is a flow of electrons).
   
   
   • The cathode gives electrons to the emissive layer of organic molecules.
   • The anode removes electrons from the conductive layer of organic molecules. (This is the equivalent to giving electron holes to the conductive layer.)
3. At the boundary between the emissive and the conductive layers, electrons find electron holes.
   
   
   • When an electron finds an electron hole, the electron fills the hole (it falls into an energy level of the atom that's missing an electron).
   • When this happens, the electron gives up energy in the form of a photon of light (see How Light Works).
4. The OLED emits light.
5. The color of the light depends on the type of organic molecule in the emissive layer. Manufacturers place several types of organic films on the same OLED to make color displays.
6. The intensity or brightness of the light depends on the amount of electrical current applied: the more current, the brighter the light.

上面的大意就是，從陰極出發的帶負電電子到了有機材料區的發射層，而陽極釋放帶正電電洞（失去電子的原子）由有機材料區的傳導層出發。在發射層與傳導層的邊界，電子遇到電洞，產生了光子。

白話文是，來自黑暗料理界的電子先生，遇到心靈空虛的光明料理界電洞小姐，生下光子的故事。

我沒有技術背景，所以上面的敘述有錯，煩請大德們指正。

目前OLED面板離真正商業化量產還有很長一段路。
看看Sony XEL-1這台大出風頭的11吋OLED TV，售價是USD$2,499！