WHU pab pawg qhia tau hais tias kev txhim kho quantum efficiency ntawm UV LEDs los ntawm kev qhia AlInGaN / AlGaN superlattice electron thaiv txheej.
Pab pawg tshawb fawb coj los ntawm Shengjun Zhou ntawm Wuhan University tau tshaj tawm txog kev tsim tshwj xeeb ntawm electron thaiv txheej (EBL) txhawm rau txhim kho kev ua haujlwm ntawm ultraviolet lub teeb-emitting diodes (UV LEDs). Lawv tau thov ib qho AlInGaN / AlGaN superlattice electron thaiv txheej (SEBL) los txhawb quantum efficiency ntawm ~ 371 nm UV LEDs.
UV LEDs tau txais kev txaus siab rau cov ntawv thov zoo heev, xws li lithography, kho kho mob, 3D luam ntawv, roj sensing, cog teeb pom kev zoo, thiab siv qhov chaw ntawm cov LEDs dawb. Txawm li cas los xij, qhov qis dua quantum efficiency ntawm UV LEDs cuam tshuam lawv cov kev siv dav ntxiv, piv nrog cov pom pom.
Cov kws tshawb fawb tau pom tias qhov kev taw qhia ntawm AlInGaN / AlGaN SEBL tuaj yeem ua tiav cov txiaj ntsig zoo UV LEDs los ntawm lub zog band hloov kho. Lub zog qis qis qis ntawm quantum qhov dej vim qhov kev cuam tshuam ntawm kev so ntawm SEBL tuaj yeem txo qhov kev sib cais ntawm cov cab kuj yoj ua haujlwm. Qhov ua kom muaj txiaj ntsig zoo thaiv qhov siab rau cov khoom siv hluav taws xob thiab cov ntawv cim hauv cov kab hluav taws xob ntawm SEBL yuav ua rau cov hluav taws xob xau tau zoo.
Tsis tas li ntawd, cov spikes nyob rau hauv lub valance band ntawm SEBL tuaj yeem nyiam qhov, yog li pab txhawb qhov kev txhaj tshuaj rau hauv cheeb tsam nquag. Tau txais txiaj ntsig los ntawm cov txiaj ntsig tseem ceeb no, UV LED nrog AlInGaN / AlGaN SEBL nthuav tawm 21 feem pua siab dua lub teeb tso zis hluav taws xob thiab me me rau pem hauv ntej voltage, piv rau UV LED nrog AlInGaN EBL.
Cov duab saum toj no qhia (a) Hla-sectional TEM cov duab ntawm UV LEDs qauv. (b) EL duab ntawm UV LED nti ntawm 60 mA.
'Rational superlattice electron thaiv txheej tsim rau boosting quantum efficiency ntawm 371 nm ultraviolet lub teeb-emitting diodes'
