ʻO ka perovskite light-emitting diode (perovskite LED) he hanauna hou ia o ka ʻenehana uila me ka mana nui i ka hōʻike, kukui, kamaʻilio a me nā māla ʻē aʻe.He haʻahaʻa ko nā LED Perovskite a me nā pono ʻenehana nui: loaʻa iā lākou nā hiʻohiʻona o ka māmā, ka lahilahi a me ka maʻalahi e like me nā OLED, a loaʻa pū kekahi i ka maʻemaʻe kala like a me ka spectral tunability i nā LED semiconductor III-V.Ma hope o kekahi mau makahiki o ka hoʻomohala ʻana, ʻoi aku ka maikaʻi o ka perovskiteNā LEDua like ia me nā ʻenehana hoʻomāmā māmā.
ʻO ke ʻano mea hana LED Perovskite (hema hema);
ʻO ke kumu hoʻohālikelike o ka molecular stabilizer SFB10 (hema lalo)
ʻO ka pilina ma waena o ka mea hana T50 ke ola a me ka ʻālohilohi (ka pakuhi ʻākau)
Eia nō naʻe, e like me ka perovskite solar cell, ʻo ka instability o perovskite LEDs ka paʻakikī nui loa no ka hoʻokō ʻana i nā noi ʻoihana.I kēia manawa, ʻo ke ola o nā LED perovskite kiʻekiʻe ma ke ʻano he 10-100 mau hola.ʻO ka lōʻihi o ke ola e pono ai no ka ʻenehana OLED e komo i ka ʻoihana ma kahi o 10,000 mau hola.Aia nā pilikia koʻikoʻi ma kēia ʻaoʻao no ka mea hiki i nā semiconductors perovskite ke paʻa ʻole.He maikai noHōʻike LED.Loaʻa i kona ʻano aniani nā waiwai ionic koʻikoʻi, a neʻe maʻalahi nā ion ma lalo o ke kahua uila i hoʻopili ʻia o ke LED, e hoʻohaʻahaʻa i ka mea.
I kēia mau lā, ʻo ka hui o Polofesa David Di a me ka mea noiʻi ʻo Zhao Baodan mai ka State Key Laboratory of Modern Optical Instruments, School of Optoelectronics, Zhejiang University and the
Ua hana ʻo International Research Center o Advanced Photonics, Haining International Campus, i nā mea nui i kēia ala.Ke hoʻohana nei i kahi stabilizer molecular bipolar, ua hoʻokō lākou i nā ola hana lōʻihi loa i nā LED perovskite e kūpono ana i nā pono o nā noi kūpono.
"Ua alakaʻi ʻia kēia mau perovskite LED e ka manawa mau o 5 mA/c㎡ no 5 mau mahina (3600 mau hola) me ka hāʻule ʻole o ka mālamalama," wahi a David Dee.ʻIke LED.No ka meaP1.56Hōʻike LED.Paʻa loa kēia mau mea hana, a ʻike ʻia kekahi mau hoʻāʻo e hoʻomau nei e paʻakikī ke hoʻopau i loko o hoʻokahi makahiki a ʻoi aku paha.I mea e loaʻa ai ka ʻikepili o ke ola i loko o kahi manawa hoʻokolohua kūpono, pono e hoʻokō ʻia nā hoʻokolohua kahiko o LED. "
Hōʻike kēia mau LED perovskite kokoke i ka infrared i nā ola hana lōʻihi loa.No ka laʻana, me ka ʻōlinolino mua o 2.1 W sr-1 m-2 (i kēia manawa o 3.2 mA/c㎡), ʻo ka mea i manaʻo ʻia ʻo T50 ke ola (ʻo ka manawa e emi ai ka ʻōlinolino mua i 50%) he 32675 mau hola ( 3.7 makahiki).ʻO ka mana optical i hāʻawi ʻia e kēia ʻālohilohi e hoʻohālikelike ʻia me kahi OLED ʻōmaʻomaʻo pāʻoihana e hana ana ma kahi kukui kiʻekiʻe o 1000 cd/m2.Ma kahi ʻōlinolino haʻahaʻa o 0.21 W sr-1 m-2 (1/10 o ka ʻōlinolino o luna) a i ʻole kahi o kēia manawa o 0.7 mAc㎡, manaʻo ʻia ke ola T50 he 2.4 miliona mau hola (ma kahi o 270 mau makahiki).
"Ke manaʻoʻiʻo nei mākou he mea pono e hana i kahi loiloi ola hilinaʻi o kēia LED hou, kahi i hōʻiliʻili ai mākou i 62 mau wahi ʻikepili ola ola i nā hoʻokolohua ʻelemakule wikiwiki, e uhi ana i ka ākea ākea o kēia manawa o 10-200 mA/c㎡ ākea."Ua ʻōlelo ʻo Guo Bingbing.ʻO ka electroluminescence external quantum efficiency (EQE) a me ka ikehu hoʻololi ʻana (ECE) o ka mea i hiki i 22.8% a me 20.7%, ʻo ia ka mea kiʻekiʻe loa o nā LED perovskite kokoke-infrared.
Ua ʻike nā mea kākau i kēia mau mea luminescent perovskite he mau hale aniani paʻa loa."ʻAʻole i loli ke ʻano aniani o ka mea ma hope o 322 mau lā," wahi a Zhao Baodan.
ʻO ka hana lōʻihi a me ka wikiwiki ʻana i nā hoʻokolohua kahiko o nā LED perovskite (kiʻi hema);
ʻIkepili kuantum kūpono o waho o ka mana a me nā mea paʻa (pane ʻākau)
"Ke hōʻike nei kēia i ka bipolar molecular stabilizer e kōkua i ka perovskite e mālama i kona kūlana aniani mua me nā waiwai optoelectronic maikaʻi.
ʻO ka neʻe ʻana o ka Ion i nā perovskites kekahi o nā kumu nui e alakaʻi ai i ka instability, a ʻoi aku ka koʻikoʻi o kēia pilikia ma lalo o ka mana o ka uila i hoʻohana ʻia i nā LED aHōʻike LED mini."Ke hōʻike nei kā mākou mau hoʻokolohua a me kā mākou helu ʻana i nā molekala bipolar e hana i nā paʻa kemika a i ʻole ka launa pū ʻana me nā ion ma nā palena palaoa perovskite," wahi a Guo Bingbing, "ʻo ia paha ke kumu e paʻakikī ai ka neʻe ʻana o ka ion i kā mākou perovskites. me kā mākou mau hoa hana i hōʻike i ka hoʻopau ʻana i ke ʻano o ka neʻe ʻana o ka ion," i hoʻohui ai ʻo Zhao Baodan.
Hōʻike nā hopena ola o ka mīkini ʻaʻohe "genetic defects" nā mea perovskite ma ke ʻano o ka paʻa."ʻO nā semiconductor hou, e like me ka metal halide perovskites, ua manaʻo nui ʻia he ʻano paʻa ʻole, ʻoi aku ka nui ma nā kahua uila kiʻekiʻe, e like me nā noi LED," wahi a David Dee."Ke hōʻike nei kā mākou hopena i ka hoʻokō ʻana i nā polokalamu perovskite paʻa ʻaʻole 'miona hikiʻole'".
Manaʻo ʻia ka lōʻihi o ke ola o ka mīkini e hoʻoikaika i ka hilinaʻi i ke kahua LED perovskite, no ka mea ua hoʻokō ʻo ia i ke koi kumu o ka paʻa no nā OLED pāʻoihana.Hiki ke hoʻohana ʻia kēia mau LED kokoke-infrared i nā noi e like me nā hōʻike kokoke-infrared, kamaʻilio, a me ka biology.ʻOiai e hoʻomohala ʻia nā mea uila perovskite ʻike ʻia me nā ola lōʻihi like ʻole, ʻo ka hoʻokō ʻana o nā LED perovskite ultra-stable e wehe i ke ala no ka ʻenehana luminescence perovskite e komo i nā noi ʻoihana.
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Nānā i ka hopena o ka neʻe ʻana o ka ion o ka perovskite ma lalo o ke kahua uila e ka hoʻokolohua kiʻi microfluorescence
Ka manawa hoʻouna: ʻAukake-24-2022