Perovskite light-emitting diode (perovskite LED) chizvarwa chitsva chechiedza-emitting teknolojia ine simba guru mukuratidzira, chiedza, kutaurirana uye mamwe minda.Ma LED ePerovskite ane mutengo wakaderera wekugadzira uye zvakakosha zvehunyanzvi zvakanakira: ane hunhu hwekureruka, hutete uye kuchinjika hwakafanana neOLED, uye zvakare vane yakafanana ruvara kuchena uye spectral tunability kune III-V semiconductor LEDs.Mushure memakore mashomanana ekubudirira, kushanda kwe perovskiteLEDsinofananidzwa neiyo yeruzivo rwekugadzira chiedza-emitting.
Perovskite LED mudziyo chimiro (kumusoro kuruboshwe);
Kemikari formula ye bipolar molecular stabilizer SFB10 (pazasi kuruboshwe)
Hukama pakati pemudziyo T50 hupenyu hwese uye kupenya (kurudyi girafu)
Zvisinei, zvakafanana neperovskite solar cells, kusagadzikana kweperovskite LEDs ndiro dambudziko guru rekuona kushandiswa kwemaindasitiri.Parizvino, hupenyu hwepamusoro-performance perovskite LEDs kazhinji pane kurongeka kwemaawa 10-100.Hupenyu hunodiwa kuti tekinoroji yeOLED ipinde mumaindasitiri ingangoita maawa gumi.Pane matambudziko akakosha munzira iyi nekuti perovskite semiconductors inogona kunge isina kugadzikana.YakanakiraChiratidziro che LED.Chimiro chayo chekristaro chine zvakakosha ionic zvimiro, uye ions inofamba nyore pasi penzvimbo yemagetsi inoshandiswa ye LED, zvichiita kuti zvinhu zvidzike.
Nguva pfupi yadarika, timu yaProfessor David Di nemuongorori Zhao Baodan kubva kuState Key Laboratory ye Modern Optical Instruments, Chikoro cheOptoelectronics, Zhejiang University uye
International Research Center yeAdvanced Photonics, Haining International Campus, vakaita budiriro yakakosha munzira iyi.Vachishandisa bipolar molecular stabilizer, vakawana hupenyu hurefu hwekushanda mu perovskite LEDs dzinosangana nezvinodiwa zvekushandisa zvinoshanda.
"Aya ma LED eperovskite aifambiswa neanogara aripo e5 mA/c㎡ kwemwedzi mishanu inoteedzana (maawa 3600) pasina kudonha kupenya," akadaro David Dee.LED maonero.ForP1.56Chiratidziro che LED.Midziyo iyi yakagadzikana, uye mimwe miedzo ichiri kuitika inoita seyakaoma kupedza mukati megore kana kudarika.Kuti uwane dhata rehupenyu mukati menguva inonzwisisika yekuyedza, LED inomhanyisa kuyedza kuchembera inoda kuitwa. "
Aya ari pedyo-infrared perovskite LEDs anoratidza ultra-refu kushanda hupenyu.Semuenzaniso, nekupenya kwekutanga kwe2.1 W sr-1 m-2 (ikozvino kwe3.2 mA/c㎡), iyo inofungidzirwa mudziyo T50 hupenyu hwese (nguva inotora kuti kupenya kwekutanga kudzikire kusvika pa50%) i32675 maawa ( 3.7 gore).Simba rekuona rinopihwa nekupenya uku rinofananidzwa neyekutengesa girini OLED inoshanda pakupenya kwakanyanya kwe1000 cd/m2.Pakupenya kwakaderera kwe0.21 W sr-1 m-2 (1/10 yekupenya kuri pamusoro) kana ikozvino ye0.7 mAc㎡, hupenyu hweT50 hunofungidzirwa kuve 2.4 miriyoni maawa (anenge makore 270).
"Tinotenda kuti zvakakosha kuita ongororo yakavimbika yehupenyu hwe LED iyi nyowani, yatakaunganidza makumi matanhatu nemaviri ehupenyu hwese data mapoinzi mukukurumidzira kuyedza kuchembera, ichifukidza yakakura kwazvo inogoneka yazvino density ye10-200 mA/c㎡ renji."Guo Bingbing akadaro.Iyo electroluminescence yekunze kuwanda kwehuwandu (EQE) uye simba rekushandura simba (ECE) yechishandiso yakasvika 22.8% uye 20.7%, zvichiteerana, iyo ndiyo yakanyanya kunaka yepedyo-infrared perovskite LEDs.
Vanyori vakaona kuti izvi perovskite luminescent zvinhu zvine zvimiro zvekristaro zvakagadzikana."Chimiro chekristaro chezvinyorwa hachina kuchinja mushure memazuva anopfuura 322," akadaro Zhao Baodan.
Kushanda kwenguva refu uye kukurumidza kuchembera kuedza kweperovskite LEDs (chifananidzo chekuruboshwe);
Yekunze quantum kunyatsoita data yekutonga uye yakagadzikana zvishandiso (kurudyi panhi)
"Izvi zvinoratidza kuti bipolar molecular stabilizer inobatsira perovskite kuchengetedza chikamu chayo chekristal chepakutanga nepamusoro-soro optoelectronic properties. Chimiro chekristani chemaitiro ekugadzirisa maitiro eperovskite akachinja zvikuru uye akaora mukati memavhiki maviri. "
Ion migration mu perovskites ndechimwe chezvinhu zvakakosha zvinotungamirira mukusagadzikana, uye dambudziko iri rinowedzera zvakanyanya pasi pesimba rekushandiswa kwemagetsi mu LEDs uyeMini LED kuratidza."Kuedza kwedu uye kuverenga kunoratidza kuti bipolar molecules inogadzira zvisungo zvemakemikari kana kupindirana neioni pamiganhu yezviyo zveperovskite," akadaro Guo Bingbing, "izvo zvingava chikonzero nei kutama kweion kuchioma mumaperovskites edu. "Kuedza kwemagetsi nemaziso kwatakatakura kunze nevatinoshanda navo vakaratidza kudzvinyirirwa kwechiitiko chekufamba kweion," akawedzera Zhao Baodan.
Migumisiro yehupenyu hwemudziyo inoratidza kuti perovskite zvinhu hazvina "genetic defects" maererano nekugadzikana."Semiconductors mitsva, yakadai sesimbi halide perovskites, inowanzoonekwa seisina kugadzikana, kunyanya pamagetsi emagetsi akakwirira, akadai mumashandisirwo e LED," akadaro David Dee."Zvatinowana zvinoratidza kuti kuwana yakagadzikana perovskite zvishandiso hazvisi 'basa risingagoneke'".
Iyo yekupedzisira-yakareba mudziyo wehupenyu inotarisirwa kuwedzera kuvimba mune perovskite LED munda, sezvo yakazadzisa zvakakosha zvinodiwa zvekugadzikana kwekutengesa OLEDs.Aya ari pedyo-infrared LEDs anogona kushandiswa mumashandisirwo akadai sepedyo-infrared kuratidza, kutaurirana, uye biology.Kunyange zvazvo michina inooneka-yechiedza perovskite ine hupenyu hurefu hwakafanana inoramba ichigadzirwa, kuitika kwe-ultra-stable perovskite LEDs kunovhura nzira ye perovskite luminescence tekinoroji kupinda mumaindasitiri ekushandisa.
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Kucherechedzwa kweion migration mhedzisiro ye perovskite pasi pemunda wemagetsi ne microfluorescence imaging kuyedza.
Nguva yekutumira: Aug-24-2022