Raws li kev tshaj tawm xov xwm txawv teb chaws, pab pawg tshawb fawb coj los ntawm xibfwb Zhou Shengjun ntawm Wuhan University tau tsim lub siab -kev ua tau zoo GaN-raws li ntsuab LED ntawm sapphire substrate. Pab neeg tshawb fawb tau thov kom siv cov txheej txheem hybrid nucleation (Hybrid Nucleation Layer) tsim los ntawm sputtered AIN (Sputtered AlN) thiab nruab nrab -kub GaN cov cuab yeej los txhim kho quantum efficiency ntawm GaN-raws li ntsuab LEDs.
Tam sim no, txoj kev loj hlob ntawm siab -efficiency III-nitride emitters nyob rau hauv tag nrho cov pom ntau yam yog heev txaus nyiam, thiab fusion ntawm ntau yam xim III -nitride emitters enables npaum thiab meej hybrid spectral tswj. , ua rau muaj siab - daws teeb meem thiab ntau yam kev siv teeb pom kev zoo, tab sis qhov teeb meem tseem ceeb tam sim no yog qhov ua tsis tau zoo ntawm III -nitride emitters nyob rau hauv ntsuab mus rau tan spectral cheeb tsam.
Txog rau qhov kawg no, cov kws tshawb fawb ntawm Wuhan University tau siv cov txheej txheem tshiab hybrid nucleation los tsim kom muaj -kev ua tau zoo InGaN/GaN ntsuab LEDs ntawm sapphire substrates. Thaum lub sij hawm tsim cov txheej txheem, cov txheej txheej nucleation sib xyaw thiab GaN nto yuav tsim cov txheej txheem Stacking Fault, uas yuav pab ua kom tiav Misfit Stress Compensation.
Tau txais txiaj ntsig los ntawm kev pib thermal mismatch kev ntxhov siab so, Disloaction Density thiab Residual Stress hauv ntsuab LEDs raug txo. Raws li qhov tshwm sim, pab pawg tshawb fawb tau txhim kho qhov ua tau zoo li ntawm 16 feem pua thaum lub sijhawm tsim khoom loj.
Pab pawg tshawb fawb Wuhan University tau hais tias daim ntawv thov kev cia siab ntawm cov txheej txheem hybrid nucleation yog qhov muaj txiaj ntsig zoo rau kev ua tiav siab -efficiency III-nitride emitters nyob rau hauv ntsuab mus rau daj- cheeb tsam xim av.
