Yofalitsidwa pa Ogasiti 9, 2024, nthawi ya 15:30 EE Times Japan
Gulu lofufuza kuchokera ku Japan Hokkaido University lapanga limodzi "transistor ya oxide thin-film" yokhala ndi electron mobility ya 78cm2/Vs komanso yokhazikika bwino ndi Kochi University of Technology. Zidzakhala zotheka kuyendetsa zowonetsera za ma TV a 8K OLED a m'badwo watsopano.
Pamwamba pa filimu yopyapyala yogwira ntchito pamakhala ndi filimu yoteteza, zomwe zimapangitsa kuti pakhale bata kwambiri.
Mu Ogasiti 2024, gulu lofufuza kuphatikizapo Wothandizira Pulofesa Yusaku Kyo ndi Pulofesa Hiromichi Ota wa Research Institute for Electronic Science, Hokkaido University, mogwirizana ndi Pulofesa Mamoru Furuta wa Sukulu ya Sayansi ndi Ukadaulo, Kochi University of Technology, adalengeza kuti apanga "transistor yopyapyala ya oxide" yokhala ndi electron mobility ya 78cm2/Vs komanso kukhazikika kwabwino. Zidzakhala zotheka kuyendetsa zowonetsera za ma TV a 8K OLED a m'badwo wotsatira.
Ma TV a 4K OLED omwe alipo pano amagwiritsa ntchito ma transistors a oxide-IGZO thin-film (a-IGZO TFTs) kuti ayendetse ma screen. Kuyenda kwa ma electron kwa transistor iyi ndi pafupifupi 5 mpaka 10 cm2/Vs. Komabe, kuti ayendetse screen ya TV ya 8K OLED ya m'badwo wotsatira, transistor ya oxide thin-film yokhala ndi kuyenda kwa ma electron kwa 70 cm2/Vs kapena kuposerapo imafunika.
Wothandizira Pulofesa Mago ndi gulu lake adapanga TFT yokhala ndi kuyenda kwa ma elekitironi kwa 140 cm2/Vs 2022, pogwiritsa ntchito filimu yopyapyala yaokusayidi wa indium (In2O3)pa gawo logwira ntchito. Komabe, silinagwiritsidwe ntchito kwenikweni chifukwa kukhazikika kwake (kudalirika) kunali kofooka kwambiri chifukwa cha kuyamwa ndi kusungunuka kwa mamolekyu a mpweya mumlengalenga.
Nthawi ino, gulu lofufuza linaganiza zophimba pamwamba pa gawo lochepa la ntchito ndi filimu yoteteza kuti mpweya usalowe mumlengalenga. Zotsatira za kafukufukuyu zinasonyeza kuti ma TFT okhala ndi mafilimu oteteza ayttrium okusayidindiokusayidi wa erbiumZinali ndi kukhazikika kwakukulu. Komanso, kuyenda kwa ma elekitironi kunali 78 cm2/Vs, ndipo makhalidwe ake sanasinthe ngakhale magetsi a ±20V atagwiritsidwa ntchito kwa maola 1.5, n’kukhalabe okhazikika.
Kumbali inayi, kukhazikika sikunawongoke mu ma TFT omwe amagwiritsa ntchito hafnium oxide kapenaokusayidi wa aluminiyamungati mafilimu oteteza. Pamene dongosolo la atomu linawonedwa pogwiritsa ntchito maikulosikopu ya elekitironi, zinapezeka kutiokusayidi wa indiamu ndiyttrium okusayidi Zinali zomangiriridwa mwamphamvu pamlingo wa atomu (heteroepitaxial growth). Mosiyana ndi zimenezi, zinatsimikiziridwa kuti mu ma TFT omwe kukhazikika kwawo sikunawongoke, kulumikizana pakati pa indium oxide ndi filimu yoteteza kunali kosasintha.