Cov ntaub ntawv semiconductor tshiab nyias thiab mos siv tau los ua micro thiabcov khoom siv nano optoelectronic
roperties, tuab ntawm tsuas yog ob peb nanometers, cov khoom zoo optical ... Tus neeg sau xov xwm tau kawm los ntawm Nanjing University of Technology tias pawg tshawb fawb ntawm tus xibfwb ntawm physics Department ntawm lub tsev kawm ntawv tau npaj ib qho ultra-thin zoo ob-seem lead iodide siv lead ua, thiab los ntawm nws kom ua tiav kev tswj hwm ntawm cov khoom optical ntawm ob-seem hloov pauv hlau sulfide cov ntaub ntawv, uas muab lub tswv yim tshiab rau kev tsim cov hnub ci cell thiabphotodetectorsCov txiaj ntsig tau luam tawm hauv tsab ntawv xov xwm thoob ntiaj teb Advanced Materials tshiab kawg.
"Cov nanosheets ua los ntawm cov hlau lead iodide uas peb tau npaj thawj zaug, lo lus siv yog 'atomically thick wide band gap two-dimensional PbI2 crystals', uas yog cov khoom siv semiconductor uas nyias nyias nrog ob peb nanometers xwb." Sun Yan, tus sau thawj zaug ntawm daim ntawv thiab tus neeg sib tw kawm tiav qib siab hauv Nanjing University of Technology, tau hais tias lawv siv txoj kev daws teeb meem los tsim cov khoom siv, uas muaj cov khoom siv tsawg heev thiab muaj qhov zoo ntawm kev yooj yim, ceev thiab ua haujlwm tau zoo, thiab tuaj yeem ua tau raws li qhov xav tau ntawm kev npaj cov khoom siv loj thiab cov khoom siv tau zoo. Cov nanosheets ua los ntawm cov hlau lead iodide uas tau tsim muaj cov duab peb ceg lossis hexagonal, qhov nruab nrab loj ntawm 6 microns, qhov chaw du thiab cov khoom siv kho qhov muag zoo.
Cov kws tshawb nrhiav tau muab cov nanosheet ultra-thin no ntawm cov hlau lead iodide nrog ob-seem hlau hloov pauv sulfides, tsim los ntawm kev dag, sib sau ua ke, thiab tau txais ntau hom heterojunctions, vim tias cov theem zog tau teeb tsa ua ntau txoj hauv kev sib txawv, yog li cov hlau lead iodide tuaj yeem muaj cov teebmeem sib txawv ntawm kev ua haujlwm pom ntawm ob-seem hlau hloov pauv sulfides sib txawv. Cov qauv band no tuaj yeem txhim kho qhov ua tau zoo ntawm lub teeb, uas yog qhov zoo rau kev tsim cov khoom siv xws li lub teeb-emitting diodes thiab lasers, uas tau siv rau hauv kev tso saib thiab teeb pom kev zoo, thiab tuaj yeem siv rau hauv thaj chaw ntawm photodetectors thiabcov khoom siv photovoltaic.
Qhov kev ua tiav no ua tiav qhov kev tswj hwm ntawm cov khoom siv kho qhov muag ntawm cov khoom siv hloov pauv hlau sulfide ob-seem los ntawm ultra-thin lead iodide. Piv nrog cov khoom siv optoelectronic ib txwm muaj raws li cov ntaub ntawv silicon, qhov kev ua tiav no muaj cov yam ntxwv ntawm kev ywj pheej, micro thiab nano. Yog li ntawd, nws tuaj yeem siv rau kev npaj ntawm kev ywj pheej thiab kev sib xyaw ua kecov khoom siv hluav taws xob optoelectronicNws muaj kev thov dav dav hauv thaj chaw ntawm cov khoom siv micro thiab nano optoelectronic, thiab muab lub tswv yim tshiab rau kev tsim cov hlwb hnub ci, photodetectors thiab lwm yam.
Lub sijhawm tshaj tawm: Cuaj hlis-20-2023