简介：ZnTe/ZnTe∶Culayerisusedasacomplexbackcontact.TheparametersofCdTesolarcellswithandwithoutthecomplexbackcontactsarecompared.Theeffectsofun-dopedlayerthickness,dopedconcentrationandpost-depositionannealingtemperatureofthecomplexlayeronsolarcellsperformanceareinvestigated.TheresultsshowthatZnTe/ZnTe∶CulayercanimprovebackcontactsandlargelyincreasetheconversionefficiencyofCdTesolarcells.Un-dopedlayerandpost-depositionannealingofhightemperaturecanincreaseopenvoltage.Usingthecomplexbackcontact,asmallCdTecellwithfillfactorof73.14%andconversionefficiencyof12.93%isobtained.

简介：Torsionmicromirrorisakeystructureofopticaldevicesinmicro-electro-mechanicalsystem(MEMS),suchasMEMSopticalswitches,MEMSvariableopticalattenuator,MEMSscanningmicromirrorarrayandsoon.Asilicon-basedNiCrAuMEMStorsionmicromirroristheoreticallyanalyzed.Itisshownthatinordertohave15°rotation,thedrivenvoltageshouldbeabout20Vandthethicknessofthesupportingbeammustbecontrolledintherangeofsubmicronordersofmagnitude.Thisverythinbeammakesthestructuremoreunstableandunreliable,andalsomakesthefabricationmorecomplicated.Basedonparallelback-electrodeanalysisandtesting,atiltedback-electrodehasbeendesignedtoreplacetheparallelback-electrodeinordertodecreasethedrivenvoltageanddifficultyoffabricatingprocessing.Bytheoreticalanalysisandsimulation,aconclusioncanbedrownthatthethicknesscanbeimprovedfromsubmicrontomicronbyusingtiltedback-electrodewhenusingthesamedrivenvoltage.Tiltedback-electrodeisveryeffectivetoimprovethestabilityandreliabilityofthemicromirrorstructure.