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1、ThedevelopmentandapplicationofsemiconductormaterialsOutline1，Backgroundintroduction2,Thesimpleprincipleofsemiconductormaterials3,Theperformanceofsemiconductormaterials4,Applicationandadvantagesofsemiconductormaterials5,Prospectsforthedevelopmentofsemiconductor
2、devicesBackgroundIn1947,thefirsttransistorwasinventedbyJohnBardeenandWalterBrattaininBelllabs.In1954,thefirstsolarcellwasinventedbyChapinBelllabs.In1958-1959，asimpleintegratedcircuitcameouttothepublicIn1962,HallinventedthefirstsemiconductorlaserThesimpleprinci
3、pleofsemiconductormaterialsasubstanceasgermanium(锗)orsilicon（硅）whoseelectricalconductivityisintermediatebetweenthatofametalandaninsulator.Theperformanceofsemiconductoritsconductivityincreaseswithincreasingtemperatureandinthepresenceofimpurities.Photovoltaiceff
4、ect.photoconductiveeffect.UnidirectionalConductivity.ApplicationandadvantagesofsemiconductormaterialssolarcellsLightEmittingDiode(LED)integratedcircuit(IC)semiconductorlaserWhenthesolarcellsurfaceexposedtothelight,makingtheelectronstransition,gatheringtoformap
5、otentialdifferenceonbothsidesoftheP-Njunction.solarcellsadvantages:1),Solarpowerisnon-polluting2),Thelightandenergyfromthesunisfree3),Solarcellsrequireverylittlemaintenance4),solarpowerissilentpoweredLEDLEDconvertselectricalenergyintolight.advantages:ledlighti
6、ngwithenergyefficient,low-carbonenvironment,smallsize,highstrength,lowvoltagedrive,highstabilityofthelamp,highwaterproof,etcintegratedcircuitTheadvantagesofintegratedcircuitsasfollows:smallsize,lightweight,longlife,highreliabilityandperformance.semiconductorla
7、sercomparedtotheOrdinarylaser，advantages：1），longerlife，2），smallersize，3），Lessconsumptionofelectricity4），HigherefficiencyProspectsforthedevelopmentofsemiconductordevicessomeproductionsshowingthesemiconductorusedindifferentareassummaryThesimpleprincipleofsemicon
8、ductormaterial,Applicationandadvantagesofsemiconductormaterial,Prospectsforthedevelopmentofsemiconductordevices:Semiconductorstreetlights,thermometer,air-conditioningthankyouforyou
