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1、外文文献资料收集：苏州大学应用技术学院11电子班（学号1116405035）徐云刚LightEmittingDiodeFirstLEDSummaryLED(LightEmittingDiode)，light-emittingdiode，isasolidstatesemiconductordevices,whichcanbedirectlyconvertedintoelectricitytolight.LEDistheheartofasemiconductorchip，thechipisattachedtoone
2、endofastent，isthenegativeside,theotherendofthepowerofthecathode,theentirechippackagetobeepoxyresin.Semiconductorchipiscomposedoftwoparts,partoftheP-typesemiconductor,itinsidethehole-dominated,theothersideistheN-typesemiconductor,hereismainlyelectronic.Butlin
3、kingthetwosemiconductors,amongthemtheformationofanPNjunction.'*Whenthecurrentthroughthewiresroleinthischip,willbepushinge-P，Pzoneintheholewithelectroniccomposite,andthentobeissuedintheformofphotonenergy,andthisistheprincipleofLEDluminescence.Thewavelengthofl
4、ightthatisthecoloroflight,isformedbythePNjunctionofthedecisionsofthematerial.SecondLEDhistoryanddevelopment50yearsago,peoplehavetounderstandsemiconductormaterialscanproducelightofthebasicknowledge,thefirstcommercialdiodesin1960.EnglishistheLEDlightemittingdi
5、ode(LED)acronym,anditsbasicstructureisanelectroluminescentsemiconductormaterials,placedinawirerack,thensealedwithepoxyresinaround，thatis，solidpackage，Therefore，theprotectionoftheinternalbatteriescanplaytheroleofline,sotheseismicperformanceLEDgood.LEDisthecor
6、eoftheP-typesemiconductorandcomponentsoftheN-typesemiconductorchips，theP-typesemiconductorandN-typesemiconductorbetweenatransitionlayer,calledthePNjunction.InsomesemiconductormaterialsinthePNjunction,theinjectionofasmallnumberofcarrier-carrierandthemajorityo
7、ftheextratimewillbeintheformoflightenergytorelease，thusthepowertodirectconversionofsolarenergy.PNjunctiononreversevoltage,afewhard-carrierinjection,itisnotluminous.Thisuseofinjectionelectroluminescentdiodesisproducedbytheprincipleoflight-emittingdiodes,commo
8、nlyknownasLED.Whenitinapositivestateofthework(thatis，atbothendswithforwardvoltage)，thecurrentflowsfromtheLEDanode,cathode,semiconductorcrystalsontheissuefromtheultraviolettoinfraredlightofdiffer
