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1、The development and application of semiconductor materials Outline 1 Background introduction 2 The simple principle of semiconductor materials 3 The performance of semiconductor materials 4 Application and advantages of semiconductor materials 5 Prospects for the development of semiconductor devices
2、 Background In 1947 the first transistor was invented by John Bardeen and Walter Brattain in Bell labs In 1954 the first solar cell was invented by Chap in Bell labs In1958 1959 a simple integrated circuit came out to the public In 1962 Hall invented the first semiconductor laser The simple principl
3、e of semiconductor materials a substance as germanium 锗 or silicon 硅 whose electrical conductivity is intermediate between that of a metal and an insulator The performance of semiconductor its conductivity increases with increasing temperature and in the presence of impurities Photovoltaic effect ph
4、otoconductive effect Unidirectional Conductivity Application and advantages of semiconductor materials solar cells Light Emitting Diode LED integrated circuit IC semiconductor laser When the solar cell surface exposed to the light making the electrons transition gathering to form a potential differe
5、nce on both sides of the P N junction solar cells advantages 1 Solar power is non polluting 2 The light and energy from the sun is free 3 Solar cells require very little maintenance 4 solar power is silent powered LED LED converts electrical energy into light advantages led lighting with energy effi
6、cient low carbon environment small size high strength low voltage drive high stability of the lamp high waterproof etc integrated circuit The advantages of integrated circuits as follows small size light weight long life high reliability and performance semiconductor laser compared to the Ordinary l
7、aser advantages 1 longer life 2 smaller size 3 Less consumption of electricity 4 Higher efficiency Prospects for the development of semiconductor devices some productions showing the semiconductor used in different areas summary The simple principle of semiconductor material Application and advantages of semiconductor material Prospects for the development of semiconductor devices Semiconductor street lights thermometer air conditioning thank you for your attention 此课件下载可自行编辑修改 此课件供参考 部分内容来源于网络 如有侵权请与我联系删除
