Me ka hoʻomohala ʻana o ka hōʻike LED, ua ʻike ʻia nā ʻenehana a me ka hoʻohana ʻana o ka hōʻike LED.
Maʻaneʻi makemake wau e kamaʻilio i kekahi mau ʻenehana hou oHōʻike LED.Hiki iā mākou ke aʻo i nā ʻano o ka hōʻike LED mai kēia mau ʻenehana hou.E kōkua kēia iā mākou e hoʻoholo i ka maikaʻi.
Ua hana ʻia kahi holomua nui ma ke kahua o ka noiʻi OLED haiki-spectrum
Ma ʻOkakopa 14, ua paʻi ʻo Nature Photonics ma ka pūnaewele i nā mea hou loa i hoʻokō ʻia e ka hui o Professor Yang Chuluo o ke Kulanui o Shenzhen ma ke kahua o ka noiʻi OLED.
Ua lilo nā mea i hoʻopaneʻe ʻia ʻo Thermally Activated Delayed Fluorescence (TADF) i wahi wela no ka noiʻi ʻana i nā mea hoʻoheheʻe kukui uila (OLED) i nā makahiki he ʻumi i hala ma muli o ko lākou hiki ke hoʻokō i ka 100% kūloko quantum efficiency.I kēia mau makahiki i hala iho nei, loaʻa i nā mea hoʻohana nui ka resonance thermally activated delayed fluorescence (MR-TADF) i nā hōʻike wehewehe kiʻekiʻe ma muli o ko lākou mau hiʻohiʻona hoʻokuʻu haiki.
Eia nō naʻe, ʻo ka reverse intersystem jumping rate (kRISC) o nā mea TADF resonance he nui ka lohi, e hopena i ka attenuation ʻoi o ka pono o nā mea hoʻomālamalama kukui i ka ʻōlinolino kiʻekiʻe, he mea paʻakikī i nā mea OLED e pili ana i ka loaʻa ʻana o ka pono kiʻekiʻe. a me ka maemae kala kiʻekiʻe.a me ka ʻōwili haʻahaʻa.I mea e hoʻoponopono ai i ka pilikia koʻikoʻi o ka holo ʻana o ka pono, ua hoʻohui ka hui o Professor Yang Chuluo o ke Kulanui ʻo Shenzhen i ka BNSeSe ma ka hoʻokomo ʻana i ka mea selenium non-metallic heavy atom selenium i loko o ka nui o ka resonance framework, a ua hoʻohana i ka hopena atom kaumaha e hoʻonui ai i ka hoʻohui ʻana. ma waena o nā orbitals hoʻokahi a me ka triplet (S1 a me T1) o ka mea., ka hopena i ka kRISC kiʻekiʻe loa (2.0 ×106 s-1) a me photoluminescence quantum efficiency (100%).
He 36.8% ke kiʻekiʻe o ka pono quantum waho o ka mea mahu OLED i hoʻopaʻa ʻia ma ka hoʻohana ʻana i ka BNSeSe ma ke ʻano he kiʻekiʻe o 36.8% ka mea hoʻokipa.ʻOi aku ka kiʻekiʻe o ka hoʻokō quantum waho e like me 21.9% ma ka m-² kukui, i hoʻohālikelike ʻia me nā mea phosphorescent e like me ka iridium a me ka platinum.Eia kekahi, no ka manawa mua, ua hana lākou i nā polokalamu OLED superfluorescent me ka hoʻohana ʻana i nā mea TADF resonance-type he nui e like me ka sensitizers.ʻO nā mea uila LED alohilohi.He 40.5% ka nui o ka pono kuantum o waho a me ka pono kuantum waho o 32.4% ma 1000 cd m-² kukui.ʻOiai ma ka ʻōlinolino 10,000 cd m-², ʻoi aku ka kiʻekiʻe o ka quantum o waho e like me 23.3%, ʻoi aku ka nui o ka mana o ka mana ma mua o 200 lm W-1, a ʻo ka ʻōlinolino kiʻekiʻe kokoke i 200,000 cd m-².
Hāʻawi kēia hana i kahi manaʻo hou a me kahi ala kūpono e hoʻoponopono ai i ka pilikia roll-off pono o nā mea electroluminescent MR-TADF, nona nā manaʻo noi nui i ka hōʻike wehewehe kiʻekiʻe.Ua paʻi ʻia nā hopena pili i loko o ka puke pai kaulana honua Nature Photonics ma lalo o ke poʻo inoa o "Efficient selenium-integrated TADF OLEDs with reduced roll-off" ("Nature Photonics", impact factor 39.728, JCR District 1 of the Chinese Academy of Sciences, ranking. mua ma ke kula optics).
Ua holomua nui ʻo USTC ma ke kahua o ka perovskite LED a me ka noiʻi ʻana i nā mea uila
Loaʻa i nā mea Perovskite nā manaʻo noiʻi koʻikoʻi i nā kahua o nā cell solar, nā LED, a me nā photodetectors ma muli o kā lākou mau waiwai optoelectronic maikaʻi loa.ʻO ka maikaʻi o ka hoʻokumu ʻana o ke kiʻiʻoniʻoni a me ka microstructure o nā kiʻiʻoniʻoni perovskite he kuleana koʻikoʻi i ka hana o nā mea optoelectronic.ʻO ka nanostructure i hanaʻia ma kaʻili o ka perovskite e hoʻonui i ka hoʻopuehuʻana o nā kiʻi ma luna o kaʻili o ke kiʻi lahilahi, e loaʻa ana i kahi holomua i ka palena kūpono o nā mea LED perovskite.Ua paʻi ʻia nā hopena pili i Advanced Materials ma lalo o ke poʻo inoa "Overcoming the Outcoupling Limit of Perovskite Light-emitting Diodes with Artificially Formed Nanostructures".
Loaʻa i nā LED Perovskite nā mea maikaʻi o ka lōʻihi o ka hawewe hoʻokuʻu ʻana, haiki i ka hapalua o ka laulā ākea, a me ka hoʻomākaukau maʻalahi.ʻO ka pono o ka pono o nā LED perovskite i kēia manawa i kaupalena ʻia e ka hoʻomaʻamaʻa māmā.No laila, ʻo ka hoʻonui ʻana i ka pono o ka lawe ʻana i ka māmā o ka hāmeʻa he kuhikuhi noiʻi koʻikoʻi.Innā LED kūlohelohe a me nā LED kiko kiko, koi ʻia nā papa hoʻoheheʻe māmā hou e hoʻonui i ka unuhi kiʻi kiʻi, e like me ka hoʻohana ʻana i nā lens lens lele, nā nanostructure moth-eye biomimetic, a me nā papa hoʻohui haʻahaʻa-refractive-index.Eia nō naʻe, ʻoi aku ka paʻakikī o kēia mau ʻano hana i ke kaʻina hana a hoʻonui i ke kumukūʻai hana.
Ua hōʻike ka hui noiʻi o Xiao Zhengguo i kahi ala e hiki ai ke hoʻokumu i kahi ʻano i hoʻolālā ʻia ma ka ʻili o nā kiʻi ʻoniʻoni lahilahi perovskite,a hoʻomaikaʻi i ka ʻili māmāka pono o ka perovskite
Nā LED ma o ka hoʻonui ʻana i ka hoʻopuehu photon ma ka ʻili o ke kiʻi lahilahi.I ka wā o ka hoʻomākaukau kiʻiʻoniʻoni, ma ka hoʻomalu ʻana i ka manawa noho o ka anti-solvent ma ka ʻili kiʻi, hiki ke hoʻomalu ʻia ke kaʻina hana crystallization o perovskite, ka hopena i kahi ʻili kikokikona.No nā kiʻiʻoniʻoni me ka mānoanoa awelika o 1.5 μm, hiki ke hoʻomau ʻia ka ʻili o ka ʻili mai 15.3 nm a 241 nm, a ua hoʻonui ʻia ka haze mai 6% a ʻoi aku ma mua o 90%.
Ma muli o ka hoʻonui ʻia ʻana o ka hoʻopuʻi ʻana o ka photon ma ka ʻili kiʻiʻoniʻoni, ʻoi aku ka maikaʻi o ka lawe ʻana i ka māmā o nā LED perovskite me nā hale textured mai 11,7% a i 26,5% o nā LED planar perovskite, a me ka pono o nā mea hana like.nā LED perovskiteua hoʻonui pū ʻia mai 10%.Ua piʻi nui ka % i ka 20.5%.Hāʻawi ka hana ma luna i kahi ala hou e hana ai i nā nanostructures e hoʻomaʻamaʻa māmā no nā mea optoelectronic perovskite.ʻO ke kiʻiʻoniʻoni perovskite me ka micro-nano structure e like me ka morphology textured in crystalline silicon solar cell, ka mea i manaʻo ʻia e hoʻomaikaʻi i ka pono absorption māmā a me ka hana o nā cell solar perovskite.
Ka manawa hoʻouna: Nov-07-2022