Tshiab technology rau LED manufacturers
Raws li cov lus ceeb toom, cov kws tshawb fawb ntawm Saudi Arabia King Abdullah University of Science thiab Technology (KAUST) tau tsim cov khoom siv nanocrystalline uas tuaj yeem hloov lub teeb xiav mus rau lub teeb dawb.
Thaum cov thev naus laus zis xws li Wi-Fi thiab Bluetooth tau loj hlob, tseem muaj ntau yam txiaj ntsig los ua kom luv luv lub wavelengths ntawm electromagnetic tsis siv los xa cov ntaub ntawv.
Yog li-hu ua pom lub teeb sib txuas lus (VLC) siv cov khoom siv hluav taws xob tsis muaj zog thiab tej zaum yuav siv zog ntau dua. VLC kuj tseem muaj txoj hauv kev los sib txuas cov ntaub ntawv xa mus, teeb pom kev zoo thiab cov thev naus laus zis, xws li siv cov teeb ci qab nthab los muab kev sib txuas hauv internet rau laptops.
Ntau qhov pom kev sib txuas lus (VLC) daim ntawv thov xws li cov no xav tau LEDs dawb, feem ntau yog siv los ntawm kev sib txuas xiav -emitting diodes nrog phosphors uas hloov lub teeb rau liab thiab ntsuab. Txawm li cas los xij, txoj kev hloov pauv no tsis nrawm txaus kom phim qhov hloov pauv ceev ntawm LED rau thiab tawm.
"VLC tus nqi ua tiav nrog lub teeb dawb uas tsim los ntawm txoj kev saum toj no yog txwv rau 100 lab khoom ib ob," said Boon Ooi, tus xibfwb ntawm hluav taws xob engineering ntawm KAUST.
Ooi, tus tswv cuab ntawm Photonics Laboratory ntawm King Abdullah University of Science thiab Technology (KAUST), Osman Bakr, tus kws tshaj lij nyob rau hauv Laboratory of Functional Nanomaterials ntawm KAUST, thiab lawv cov npoj yaig siv nanocrystal-raws li converters uas ua rau kom cov ntaub ntawv siab dua tus nqi.
Raws li qhov yooj yim, tus nqi - cov tshuaj zoo, ua ke nrog cov pa nitride phosphors, pab pawg tshawb fawb tau tsim cov cesium lead bromide nanocrystals txog li 8 nanometers loj. Thaum illuminated los ntawm ib tug xiav laser, lub nanocrystals ci ntsuab, thaum lub nitrides ci liab, uas ua ke los tsim ib tug inviting dawb lub teeb.
Cov kws tshawb fawb tau siv cov txheej txheem hu ua "femtosecond transient spectroscopy" los qhia cov khoom siv kho qhov muag ntawm cov khoom siv nanocrystalline. Lawv muaj peev xwm qhia tau tias cov txheej txheem kho qhov muag ntawm cesium lead bromide nanocrystals siv sijhawm li 7 nanoseconds. Qhov no txhais tau hais tias lawv tuaj yeem kho lub teeb emission zaus mus rau 491 megahertz, uas muaj peev xwm 40 npaug sai dua li siv phosphors, ua kom cov ntaub ntawv hloov pauv ntawm 2 billion khoom ib ob.
"Cov tshuaj tiv thaiv sai yog ib feem vim qhov loj ntawm cov muaju," Bakr hais. "Lub steric confinement ua rau nws muaj feem ntau tias electrons thiab qhov yuav recombine thiab emit photons."
Qhov tseem ceeb, qhov zoo ntawm lub teeb dawb uas tsim los ntawm perovskite nanostructures yog piv rau LED technology tam sim no.
