Perovskite light-emitting diode (perovskite LED) waa jiil cusub oo tignoolajiyada iftiiminaya oo leh karti weyn oo muujin, iftiin, isgaarsiin iyo goobo kale.Perovskite LEDs waxay leeyihiin kharash yar oo wax soo saar ah iyo faa'iidooyin farsamo oo muhiim ah: waxay leeyihiin sifooyinka iftiinka, khafiifinta iyo dabacsanaanta oo la mid ah OLEDs, sidoo kale waxay leeyihiin nadiif midab la mid ah iyo tunability muuqaal ah oo loo yaqaan 'III-V semiconductor LEDs'.Ka dib dhowr sano oo kaliya ee horumarinta, waxtarka perovskiteLEDswaxay la mid tahay tignoolajiyada qaan-gaadhka ah ee iftiimisa iftiinka.
Qaab dhismeedka aaladda Perovskite LED (bidix sare);
Qaacidada kiimikaad ee xasiliyaha unugga laba-cirifoodka ah SFB10 (bidix hoose)
Xiriirka ka dhexeeya aaladda T50 cimrigeeda iyo dhalaalka (garaafka midig)
Si kastaba ha noqotee, oo la mid ah unugyada qorraxda ee perovskite, xasilloonida LED-yada perovskite waa caqabadda ugu weyn ee xaqiijinta codsiyada warshadaha.Waqtigan xaadirka ah, nolosha waxqabadka sare ee LED-yada perovskite guud ahaan waa amarka 10-100 saacadood.Cimriga looga baahan yahay tignoolajiyada OLED si ay u gasho warshadaynta waa ugu yaraan 10,000 saacadood.Waxaa jira caqabado muhiim ah oo jihadan ah sababtoo ah semiconductors perovskite waxay noqon karaan kuwo aan degganayn.Way u fiican tahayMuujinta LED.Qaab dhismeedkeeda crystal-ka waxa uu leeyahay sifooyin ionic oo muhiim ah, iyo ions si fudud ugu hoos dhaqaaqaan goobta korantada ee laydhka, taas oo keenaysa in walaxda hoos u dhacdo.
Dhawaan, kooxda Professor David Di iyo cilmi-baare Zhao Baodan oo ka socda Shaybaadhka Muhiimka ah ee Gobolka ee Qalabka Casriga ah, Dugsiga Optoelectronics, Jaamacadda Zhejiang iyo
Xarunta Cilmi-baarista Caalamiga ah ee Sawir-qaadista Sare, Haining International Campus, waxay samaysay horumarro muhiim ah dhinacan.Iyaga oo isticmaalaya stabilizer molecular-ka laba-cirifoodka ah, waxay ku guulaysteen cimriga hawleed ee ultra-dheer ee LED-yada perovskite ee buuxinaya baahiyaha codsiyada la taaban karo.
"Leds-yadan perovskite-ka ah waxaa waday xawaare joogto ah oo ah 5 mA / c㎡ 5 bilood oo isku xigta (saacadaha 3600) iyada oo aan lahayn wax dhalaal ah," ayuu yidhi David Dee.Dareenka LED.WaayoP1.56Muujinta LED.Qalabkan ayaa ah kuwo aad u xasiloon, waxaana tijaabooyinka qaar ee weli socda ay u muuqdaan kuwo ay adag tahay in lagu dhammeeyo sanad ama ka badan.Si loo helo xogta nolosha gudaha muddo tijaabo macquul ah, LED dardargelinta tijaabooyinka gabowga ayaa loo baahan yahay in la sameeyo."
LED-yadan perovskite-ka-infrared-ka dhow waxay muujinayaan cimriga shaqada ee aadka u dheer.Tusaale ahaan, oo leh dhalaal hore oo ah 2.1 W sr-1 m-2 (hadda 3.2 mA/c㎡), aaladda lagu qiyaasay T50 cimrigeeda (waqtiga ay qaadanayso iftiinka bilowga ah inuu hoos u dhaco ilaa 50%) waa 32675 saacadood 3.7 sano).Awoodda indhaha ee ay bixiso nuurkani waxay la mid tahay OLED cagaaran oo ganacsi oo ku shaqaynaya dhalaal sare oo ah 1000 cd/m2.Nalka hoose ee 0.21 W sr-1 m-2 (1/10 ee dhalaalka sare) ama hadda ah 0.7 mAc㎡, cimriga T50 waxa lagu qiyaasaa 2.4 milyan saacadood (qiyaastii 270 sano).
"Waxaan aaminsanahay inay lagama maarmaan tahay in la sameeyo falanqayn nololeed oo lagu kalsoonaan karo oo ku saabsan LED-kan cusub, kaas oo aan ku soo ururinay 62 dhibcaha xogta nolosha ee tijaabooyinka gabowga ee la dedejiyey, oo daboolaya cufnaanta ugu ballaadhan ee suurtogalka ah ee 10-200 mA / c㎡."Guo Binging ayaa yidhi.Waxtarka tamarta dibadda ee elektiroonigga ah (EQE) iyo waxtarka beddelka tamarta (ECE) ee aaladda ayaa gaadhay 22.8% iyo 20.7%, siday u kala horreeyaan, kuwaas oo ah waxtarka ugu sarreeya ee LED-yada perovskite infrared-ku dhow.
Qorayaashu waxay ogaadeen in qalabkan perovskite luminescent ay leeyihiin qaabab crystal aad u deggan."Qaabka ka samaysan walxaha isma bedelin wax ka badan 322 maalmood," Zhao Baodan ayaa yidhi.
Shaqeyn waqti dheer ah iyo tijaabinta da'da ee la dedejiyey ee LED-yada perovskite (sawirka bidix);
Xogta hufnaanta tirada dibadda ee xakamaynta iyo aaladaha xasiloon (guul midig)
"Tani waxay muujinaysaa in stabilizer laba-cirifoodka molecular ka caawisaa perovskite si ay u ilaaliyaan wajigii crystal asalka ah oo leh guryaha optoelectronic aad u fiican. Qaab dhismeedka crystal ee shaybaarka perovskite gacanta lagu daaweeyaa si weyn u bedelay iyo hoos u dhacay laba toddobaad gudahood."
Socdaalka Ion ee perovskites waa mid ka mid ah qodobbada muhiimka ah ee keenaya xasillooni darrada, dhibaatadani waxay noqotaa mid aad u daran iyadoo ay saameynayso danab codsan ee LEDs iyoMuujinta LED-yar."Tijaabooyinkeena iyo xisaabintayadu waxay muujinayaan in molecules-ka laba-cirifoodka ay abuuraan curaarta kiimikada ama isdhexgalka ions ee xuduudaha hadhuudhka perovskite," ayuu yiri Guo Binging, "taasoo noqon karta sababta keentay in socdaalka ion uu noqdo mid adag in our perovskites. "Tijaabooyinka korantada iyo indhaha ee aan qaadnay. La-shaqeeyayaashayadu waxay muujiyeen xakamaynta ifafaale dhaqdhaqaaqa ion,” ayuu raaciyay Zhao Baodan.
Natiijooyinka nolosha qalabku waxay muujinayaan in walxaha perovskite aysan lahayn "ciladaha hidde-socodka" marka la eego xasilloonida."Semiconductors cusub, sida birta halide perovskites, ayaa si weyn loogu tixgaliyaa inay yihiin kuwo aan degganayn, gaar ahaan meelaha korantada ee aad u sarreeya, sida codsiyada LED," ayuu yiri David Dee."Natiijooyinkayagu waxay muujinayaan in gaaritaanka aaladaha perovskite ee deggan aysan ahayn 'hawlgal aan macquul ahayn'".
Qalabka aadka u dheer ee cimrigiisa ayaa la filayaa inuu kor u qaado kalsoonida garoonka perovskite LED, maadaama ay buuxisay shuruudaha aasaasiga ah ee xasilloonida OLED-yada ganacsiga.Ilaysyada ku dhow-infrared-ka waxaa loo isticmaali karaa codsiyada sida bandhigyada infrared-ka dhow, isgaarsiinta, iyo bayoolaji.Inkasta oo qalabka perovskite-ka muuqda ee la midka ah ee cimriga dheer ee la midka ah uu weli yahay in la horumariyo, xaqiijinta LED-yada perovskite-ka ee aadka u xasilan ayaa u gogol-xaaraya tikniyoolajiyadda iftiinka perovskite si ay u galaan codsiyada warshadaha.
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U fiirsashada saamaynta socdaalka ion ee perovskite ee ku hoos jira beerta korantada ee tijaabada sawirka microfluorescence
Waqtiga boostada: Agoosto-24-2022