Izinto ezintsha ezincane nezithambile ze-semiconductor zingasetshenziswa ukwenza izinto ezincane nezithambileamadivayisi e-nano optoelectronic
ama-roperties, ubukhulu bama-nanometer ambalwa kuphela, izakhiwo ezinhle zokukhanya… Intatheli ifunde eNanjing University of Technology ukuthi iqembu locwaningo likaprofesa woMnyango wefiziksi wesikole lilungiselele ikristalu ye-iodide ye-lead encane kakhulu enezilinganiso ezimbili, futhi ngayo ukufeza ukulawulwa kwezakhiwo zokukhanya zezinto ze-sulfide zensimbi yokuguquguquka ezimbili, okunikeza umbono omusha wokwenziwa kwamaseli elanga kanyeama-photodetectorsImiphumela yanyatheliswa kumagazini wakamuva wephephabhuku lamazwe ngamazwe i-Advanced Materials.
“Ama-nanosheet e-lead iodide amancane kakhulu esiwalungiselele okokuqala, igama lobuchwepheshe lithi ‘amakristalu e-PbI2 aqinile kakhulu, anombala obanzi we-atomically,’, okuyizinto ze-semiconductor ezincane kakhulu ezinobukhulu obungama-nanometer ambalwa kuphela.” USun Yan, umbhali wokuqala wephepha kanye nomfundi weziqu zobudokotela eNanjing University of Technology, uthe basebenzise indlela yesisombululo ukuhlanganisa, enezidingo zemishini eziphansi kakhulu futhi inezinzuzo ezilula, ezisheshayo nezisebenzayo, futhi ezingahlangabezana nezidingo zokulungiselela izinto ezinkulu nezikhiqiza kakhulu. Ama-nanosheet e-lead iodide ahlanganisiwe anomumo ojwayelekile ongunxantathu noma ongama-hexagonal, usayizi omaphakathi wama-microns ayi-6, ubuso obubushelelezi kanye nezakhiwo ezinhle zokukhanya.
Abacwaningi bahlanganise leli nanosheet elincane kakhulu le-lead iodide nama-sulfide ensimbi yokuguquguquka amabili, aklanywe ngokwenziwa, bawahlanganisa ndawonye, futhi bathola izinhlobo ezahlukene ze-heterojunctions, ngoba amazinga wamandla ahlelwe ngezindlela ezahlukene, ngakho-ke i-lead iodide ingaba nemiphumela ehlukene ekusebenzeni kokukhanya kwama-sulfide ensimbi yokuguquguquka amabili. Lesi sakhiwo sebhendi singathuthukisa ngempumelelo ukusebenza kahle kokukhanya, okusiza ekukhiqizweni kwamadivayisi afana nama-diode akhipha ukukhanya nama-laser, asetshenziswa ekubonisweni nasekukhanyeni, futhi angasetshenziswa emkhakheni we-photodetectors kanyeamadivayisi e-photovoltaic.
Le mpumelelo ifezekisa ukulawulwa kwezakhiwo ezibonakalayo zezinto ze-sulfide zensimbi ezishintshayo ezinezinhlangothi ezimbili nge-iodide ye-lead encane kakhulu. Uma kuqhathaniswa namadivayisi endabuko e-optoelectronic asekelwe ezintweni ezisekelwe ku-silicon, le mpumelelo inezici zokuguquguquka, ezincane nezincane. Ngakho-ke, ingasetshenziswa ekulungiseleleni okuguquguqukayo nokuhlanganisiweamadivayisi e-optoelectronicInethuba elibanzi lokusetshenziswa emkhakheni wamadivayisi ahlanganisiwe e-micro kanye ne-nano optoelectronic, futhi inikeza umbono omusha wokukhiqiza amaseli elanga, ama-photodetector njalo njalo.
Isikhathi sokuthunyelwe: Septhemba-20-2023