【求助】4个问题，请求翻译与解答

02045711438 · 发表于 2008-1-22 00:20:40

请求有能力的高手高高手，帮忙我解答下列4个问题，感谢.

1. (a) How do the emitting colors of semi-conducting materials change by p-doping and n-doping, and how do their HOMO (highest occupied molecular orbital in valence band) and LUMO (lowest unoccupied molecular orbital in conduction band) energy levels change by p-doping and n-doping.
(b) Explain why the thin films of semi-conducting materials become more transparent as the conductivity is reduced.
(c) Compare the differences of chemical structural requirements and process conditions in semi-conducting organic (hydrocarbon-related) materials and semi-conducting inorganic (Si-related) materials.

2. (a) What are the definitions of refractive index and dielectric constant.
(b) Explain the principle to measure the refractive index and dielectric constant, and the parameters to influence these values in liquid crystals.
(c) Explain why liquid crystals can be used in displays regarding their refractive and dielectric properties.

3. Describe the techniques to determine if a thin film transistor is amorphous Si or polycrystalline Si type, and show the reasons why they can do it.

4. To characterize a transparent conducting electrode of indium tin oxide for flat panel displays, list a number of possible ways for the measurement of surface roughness and chemical compositions with the related basic principles.

【求助】4个问题，请求翻译与解答

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