Ua lilo nā kukui LED i mea hoʻonā kukui ubiquitous no nā hale a me nā ʻoihana, akā ua kākau nā LED kuʻuna i ko lākou mau hemahema i ka wā e pili ana i nā hōʻike nui a kiʻekiʻe.Nā hōʻike LEDhoʻohana i nā voltages kiʻekiʻe a me kahi mea i kapa ʻia ʻo ka hoʻololi ʻana i ka mana kūloko he haʻahaʻa, ʻo ia hoʻi he kiʻekiʻe ke kumukūʻai ikehu o ka holo ʻana i ka hōʻike, ʻaʻole lōʻihi ke ola hōʻike, a hiki ke holo wela loa.
I loko o kahi pepa i paʻi ʻia ma Nano Research, hōʻike nā mea noiʻi pehea e hiki ai i kahi holomua ʻenehana i kapa ʻia ʻo quantum dots ke hoʻoponopono i kekahi o kēia mau pilikia.ʻO nā kiko kuantum he mau kristal liʻiliʻi liʻiliʻi e hana ana ma ke ʻano he semiconductor.Ma muli o ko lākou nui, loaʻa iā lākou nā waiwai kūʻokoʻa e hiki ke hoʻohana pono iā lākou i ka ʻenehana hōʻike.
Ua ʻōlelo ʻo Xing Lin, he loea kōkua o ka ʻepekema ʻike a me ka ʻenekini uila ma Zhejiang UniversityHōʻike LEDua holomua ma nā kahua e like me ka hōʻike, kukui a me nā kamaʻilio optical.Eia nō naʻe, ʻo nā ʻenehana i hoʻohana ʻia no ka loaʻa ʻana o nā mea semiconductor kiʻekiʻe kiʻekiʻe a me nā mea hana he ikaika loa ka ikaika a me ke kumu kūʻai.Hāʻawi nā Colloidal quantum dots i kahi ala kūʻai kūʻai e kūkulu i nā LED hana kiʻekiʻe me ka hoʻohana ʻana i nā ʻenehana hoʻoponopono hoʻonā maʻalahi a me nā mea hana kemika.Eia kekahi, ma ke ʻano he mea anorganic, ʻoi aku ka nui o nā colloidal quantum dots ma mua o ka emissive organic semiconductors ma ke ʻano o ka paʻa o ka hana lōʻihi.
Hoʻokumu ʻia nā hōʻike LED āpau i nā papa he nui.ʻO kekahi o nā papa koʻikoʻi ka papa emissive, kahi e hoʻohuli ʻia ai ka ikehu uila i kukui kala.Ua hoʻohana nā mea noiʻi i hoʻokahi papa o nā kiko quantum e like me ka papa hoʻokuʻu.ʻO ka maʻamau, ʻo ka colloidal quantum dot emission layer ke kumu o ka nalo uila ma muli o ka maikaʻi ʻole o ka conductivity o nā paʻa colloidal quantum dot.Ma ka hoʻohana ʻana i hoʻokahi papa o nā kiko quantum e like me ka papa emissive, manaʻo ka poʻe noiʻi e hiki iā lākou ke hoʻemi i ka volta i ka palena kiʻekiʻe e mana i kēia mau hōʻike.
ʻO kahi hiʻohiʻona ʻē aʻe o nā kiko quantum e hoʻolilo iā lākou i kūpono no ka LED ʻo ia ka hiki ke hana ʻia me ka ʻole o nā hemahema e hoʻopilikia ai i ko lākou pono.Hiki ke hoʻolālā ʻia nā kiko kuantum me ka ʻole o nā haumia a me nā hemahema o ka ʻili.Wahi a Lin, hiki i ka quantum dot LED (QLED) ke hoʻokō kokoke i ka hui ʻana o ka mana hoʻololi i loko o nā density o kēia manawa kūpono no ka hōʻike a me nā noi kukui.Hōʻike ʻia nā LED maʻamau e pili ana i nā semiconductor ulu epitaxially e hōʻike ana i ka holo maikaʻi ʻana i loko o ka laulā like o kēia manawa.Maikaʻi noʻoihana hōʻike LED.Loaʻa kēia ʻokoʻa mai ke ʻano kīnā ʻole o nā kiko quantum kiʻekiʻe.
ʻO ke kumu kūʻai haʻahaʻa o ka hana ʻana i nā papa emissive me nā kiko quantum a me ka hiki ke hoʻohana i nā ʻenehana ʻenehana optical e hoʻomaikaʻi i ka pono o ka lawe ʻana i ka māmā o QLED, manaʻo nā mea noiʻi, hiki ke hoʻomaikaʻi maikaʻi i ka LED kuʻuna i hoʻohana ʻia i nā kukui, nā hōʻike, a me nā mea hou aku.Akā ʻoi aku ka nui o nā noiʻi e hana ʻia, a he mau hemahema ka QLED o kēia manawa e pono e hoʻokō ʻia ma mua o ka hiki ke hoʻohana nui ʻia.
Wahi a Lin, ua hōʻike ka noiʻi e hiki ke unuhi ʻia ka ikehu wela e hoʻomaikaʻi i ka pono o ka hoʻololi ʻana i ka mana electro-optical.Eia nō naʻe, ʻaʻole mamao loa ka hana ʻana o ka hāmeʻa i kēia pae i ke ʻano o nā volta hana kiʻekiʻe a me nā haʻahaʻa haʻahaʻa o kēia manawa.Hiki ke hoʻopau ʻia kēia mau nāwaliwali ma o ka ʻimi ʻana i nā mea lawe ukana ʻoi aku ka maikaʻi a me ka hoʻolālā ʻana i ke kikowaena ma waena o ka halihali uku a me nā papa helu quantum.ʻO ka pahuhopu hope loa—e hoʻomaopopo i nā mea hoʻoheheʻe electroluminescent—pono ke kumu QLED.
Ka manawa hoʻouna: Sep-21-2022