I-Perovskite light-emitting diode (i-perovskite LED) isizukulwana esitsha sobuchwephesha obuvelisa ukukhanya kunye namandla amakhulu ekuboniseni, ukukhanya, ukunxibelelana kunye nezinye iinkalo.Ii-LED ze-Perovskite zineendleko eziphantsi zokuvelisa kunye neenzuzo ezibalulekileyo zobuchwepheshe: zineempawu zokukhanya, ukucotha kunye nokuguquguquka okufana ne-OLED, kwaye zibuye zibe nokucoceka kombala ofanayo kunye nokulinganisa okubonakalayo kwi-III-V semiconductor LEDs.Emva kweminyaka embalwa yophuhliso, ukusebenza kakuhle kwe-perovskiteii-LEDsithelekiseka nobobuchwephesha bokukhupha ukukhanya.
Isakhiwo sesixhobo se-LED sePerovskite (phezulu ngasekhohlo);
Ifomula yekhemikhali ye-bipolar molecular stabilizer SFB10 (ezantsi ekhohlo)
Ubudlelwane phakathi kwesixhobo T50 ubomi kunye nokukhanya (igrafu yasekunene)
Nangona kunjalo, kufana neeseli zelanga ze-perovskite, ukungazinzi kwee-LED ze-perovskite ngumngeni omkhulu wokuqonda izicelo zoshishino.Okwangoku, ixesha lokuphila kwee-LED eziphezulu ze-perovskite ngokuqhelekileyo kumyalelo weeyure ze-10-100.Ubomi obufunekayo ukuze itekhnoloji ye-OLED ingene kwishishini ubuncinane iiyure ezili-10,000.Kukho imiceli mngeni ebalulekileyo kweli cala kuba i-perovskite semiconductors inokungazinzi ngaphakathi.IlungeleUmboniso we-LED.Isakhiwo sayo se-crystal sineempawu ezibalulekileyo ze-ionic, kunye ne-ion zihamba ngokulula phantsi kwendawo yombane esetyenzisiweyo ye-LED, ebangela ukuba izinto zihlaziywe.
Kutshanje, iqela likaNjingalwazi uDavid Di kunye nomphandi uZhao Baodan ovela kwiLabhoratri yeState Key ye-Modern Optical Instruments, iSikolo se-Optoelectronics, iYunivesithi yaseZhejiang kunye
Iziko loPhando lwaMazwe ngaMazwe leeFotonics eziPhambili, iHaining International Campus, lenze impumelelo ebalulekileyo kweli cala.Ukusebenzisa i-bipolar molecular stabilizer, bafezekise ixesha elide lokusebenza kwi-perovskite LEDs ezihlangabezana neemfuno zezicelo eziphathekayo.
"Ezi zi-LED ze-perovskite ziqhutywe ngumbane oqhubekayo we-5 mA / c㎡ kwiinyanga ezi-5 ezilandelelanayo (iiyure ze-3600) ngaphandle kokukhanya okukhanyayo," kusho uDavid Dee.Umbono we-LED.KubaP1.56Umboniso we-LED.Ezi zixhobo zizinzile kakhulu, kwaye ezinye iimvavanyo ezisaqhubayo kubonakala kunzima ukuzigqiba kwisithuba sonyaka okanye ngaphezulu.Ukuze ufumane idatha yobomi ngexesha lovavanyo olufanelekileyo, uvavanyo olukhawulezileyo lwe-LED kufuneka lwenziwe. ”
Ezi zi-LED ze-perovskite ezikufutshane ne-infrared zibonisa ixesha elide lokusebenza ixesha elide.Umzekelo, kunye nokukhanya kokuqala kwe-2.1 W sr-1 m-2 (yangoku ye-3.2 mA/c㎡), isixhobo esiqikelelwayo se-T50 ubomi bonke (ixesha elithathayo ukuhla kwemitha yokuqala ukuya kuma-50%) ziiyure ezingama-32675 ( 3.7 iminyaka).Amandla okukhanya abonelelwa ngoku kukhanya afaniswa ne-OLED eluhlaza yorhwebo esebenza ngokukhanya okuphezulu kwe-1000 cd / m2.Ngokukhanya okuphantsi kwe-0.21 W sr-1 m-2 (1/10 yokukhanya okungentla) okanye i-current ye-0.7 mAc㎡, ixesha lokuphila kwe-T50 liqikelelwa kwiiyure ze-2.4 yezigidi (malunga ne-270 iminyaka).
"Sikholelwa ukuba kuyimfuneko ukwenza uhlalutyo oluthembekileyo lobomi be-LED entsha, apho siqokelele amanqaku edatha ye-62 yobomi bonke kwiimvavanyo zokuguga ezikhawulezayo, ezigubungela ubuninzi obukhoyo obukhoyo be-10-200 mA / c㎡ uluhlu."UGuo Bingbing uthe.I-electroluminescence yangaphandle ye-quantum yokusebenza kakuhle (EQE) kunye nokusebenza kakuhle kokuguqulwa kwamandla (ECE) yesixhobo ifikelele kwi-22.8% kunye ne-20.7%, ngokulandelanayo, ezona ziphezulu ze-LED ze-perovskite ezikufutshane ne-infrared.
Ababhali bafumanisa ukuba ezi zinto ze-perovskite luminescent zinezakhiwo ze-crystal ezizinzile."Isakhiwo sekristale sezinto eziphathekayo asitshintshi emva kweentsuku ezingaphezu kwe-322," kusho uZhao Baodan.
Ixesha elide lokusebenza kunye nokukhawuleza ukuguga imifuniselo ye-perovskite LEDs (umfanekiso osekhohlo);
Idatha yangaphandle ye-quantum esebenzayo yolawulo kunye nezixhobo ezizinzile (iphaneli yasekunene)
"Oku kubonisa ukuba i-bipolar molecular stabilizer inceda i-perovskite ukuba igcine isigaba sayo sokuqala se-crystal kunye neempawu ezibalaseleyo ze-optoelectronic. Isakhiwo se-crystal yeesampuli ze-perovskite zolawulo oluphathwayo zitshintshe kakhulu kwaye zihlanjululwe kwiiveki ezimbini. "
Ukufuduka kwe-Ion kwi-perovskites yenye yezinto ezibalulekileyo ezikhokelela ekungazinzini, kwaye le ngxaki iba yingozi ngakumbi phantsi kweempembelelo zombane osetyenzisiweyo kwii-LED kunyeUmboniso omncinci we-LED."Uvavanyo lwethu kunye nokubala kubonisa ukuba iamolekyuli ze-bipolar zenza iibhondi zeekhemikhali okanye ukusebenzisana kunye ne-ion kwimida yengqolowa ye-perovskite," kusho uGuo Bingbing, "enokuba sisizathu sokuba ukufuduka kwe-ion kuba nzima kwi-perovskites yethu. siphume nabalingane bethu babonise ukucinezelwa kwentshukumo ye-ion, ”wongeze watsho uZhao Baodan.
Iziphumo zobomi besixhobo zibonisa ukuba izinto ze-perovskite azikho "iziphene zofuzo" ngokwemiqathango yokuzinza."I-semiconductors emitsha, njenge-metal halide perovskites, ithathwa ngokubanzi njengento engazinzanga, ngakumbi kwiindawo zombane eziphakamileyo, ezifana nezicelo ze-LED," kusho uDavid Dee."Iziphumo zethu zibonisa ukuba ukufezekisa izixhobo ezizinzileyo ze-perovskite azikho 'i-mission engenakwenzeka'".
I-ultra-long-long device kulindeleke ukuba ikhulise ukuzithemba kwintsimi ye-perovskite ye-LED, njengoko izalisekise imfuneko esisiseko yokuzinza kwii-OLED zentengiso.Ezi LEDs ezikufuphi ne-infrared zingasetyenziswa kwizicelo ezifana ne-infrared displays, unxibelelwano, kunye nebhayoloji.Nangona izixhobo ze-perovskite ezikhanyayo kunye nexesha elide elifanayo zihlala ziphuhliswa, ukufezekiswa kwe-ultra-stable perovskite LEDs kuvula indlela yobuchwepheshe be-perovskite luminescence ukungena kwizicelo zoshishino.
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Ukuqwalaselwa kwempembelelo ye-ion yokufuduka kwe-perovskite phantsi kwentsimi yombane ngovavanyo lokucinga lwe-microfluorescence
Ixesha lokuposa: Aug-24-2022