Paʻi ʻia ma ʻAukake 9, 2024, ma 15:30 EE Times Iapana
Ua hoʻomohala pū kekahi hui noiʻi mai ke Kulanui ʻo Iapana ʻo Hokkaido i kahi "transistor ʻili lahilahi oxide" me ka neʻe ʻana o ka electron o 78cm2/Vs a me ke kūpaʻa maikaʻi loa me ke Kulanui ʻenehana ʻo Kochi. E hiki ke hoʻokele i nā pale o nā TV OLED 8K o ka hanauna e hiki mai ana.
Ua uhi ʻia ka ʻili o ka ʻili lahilahi papa hana me kahi ʻili pale, e hoʻomaikaʻi nui ana i ke kūpaʻa
I ʻAukake 2024, ua hoʻolaha kahi hui noiʻi e komo pū ana me ke Kōkua Polopeka Yusaku Kyo lāua ʻo Polopeka Hiromichi Ota o ka Research Institute for Electronic Science, Hokkaido University, me ka laulima ʻana me Polopeka Mamoru Furuta o ke Kula o ka ʻEpekema a me ka ʻenehana, Kochi University of Technology, ua hoʻomohala lākou i kahi "oxide thin-film transistor" me ka neʻe ʻana o ka electron o 78cm2/Vs a me ke kūpaʻa maikaʻi loa. E hiki ke hoʻokele i nā pale o nā TV OLED 8K hanauna e hiki mai ana.
Hoʻohana nā TV 4K OLED o kēia manawa i nā transistors ʻili lahilahi oxide-IGZO (a-IGZO TFTs) e hoʻokele i nā pale. ʻO ka neʻe ʻana o ka electron o kēia transistor ma kahi o 5 a 10 cm2/Vs. Eia nō naʻe, no ka hoʻokele ʻana i ka pale o kahi TV OLED 8K hanauna e hiki mai ana, pono kahi transistor ʻili lahilahi oxide me ka neʻe ʻana o ka electron o 70 cm2/Vs a ʻoi aku paha.
Ua hoʻomohala ʻo Polopeka Kōkua ʻo Mago a me kāna hui i kahi TFT me ka neʻe ʻana o ka electron o 140 cm2/Vs 2022, me ka hoʻohana ʻana i kahi ʻili lahilahi oʻokikene indium (In2O3)no ka papa hana. Eia naʻe, ʻaʻole i hoʻohana pono ʻia no ka mea ʻaʻole maikaʻi loa kona kūpaʻa (hilinaʻi) ma muli o ka adsorption a me ka desorption o nā molekala kinoea i ka lewa.
I kēia manawa, ua hoʻoholo ka hui noiʻi e uhi i ka ʻili o ka papa hana lahilahi me kahi ʻili pale e pale ai i ke kinoea mai ka hoʻopili ʻia ʻana i ka lewa. Ua hōʻike nā hopena hoʻokolohua he mau TFT me nā ʻili pale oʻokikene yttriuma meʻokikene erbiumua hōʻike i ke kūpaʻa kiʻekiʻe loa. Eia kekahi, ʻo ka neʻe ʻana o ka electron he 78 cm2/Vs, a ʻaʻole i loli nā ʻano ʻoiai ke kau ʻia kahi volta o ±20V no 1.5 mau hola, e noho paʻa ana.
Ma ka ʻaoʻao ʻē aʻe, ʻaʻole i hoʻomaikaʻi ka paʻa ma nā TFT i hoʻohana i ka hafnium oxide a i ʻoleʻokikene aluminima ke ʻano he mau kiʻiʻoniʻoni pale. I ka nānā ʻia ʻana o ka hoʻonohonoho atomika me ka hoʻohana ʻana i kahi microscope electron, ua ʻike ʻiaʻokikene indiuma a meʻokikene yttrium ua hoʻopaʻa paʻa ʻia ma ka pae atomika (ulu heteroepitaxial). I ka hoʻohālikelike ʻana, ua hōʻoia ʻia i loko o nā TFT nona ka paʻa ʻole i hoʻomaikaʻi, ʻo ka pilina ma waena o ka indium oxide a me ka ʻili pale he amorphous.