I-Perovskite light-emitting diode (i-perovskite LED) isizukulwane esisha sobuchwepheshe obukhipha ukukhanya obunamandla amakhulu ekuboniseni, ukukhanyisa, ukuxhumana neminye imikhakha.Ama-LED e-Perovskite anezindleko eziphansi zokukhiqiza kanye nezinzuzo ezibalulekile zobuchwepheshe: anezici zokukhanya, ukuqina nokuguquguquka okufana nama-OLED, futhi abe nokuhlanzeka kombala okufanayo kanye ne-spectral tunability ku-III-V semiconductor LEDs.Ngemva kweminyaka embalwa nje yokuthuthukiswa, ukusebenza kahle kwe-perovskiteAma-LEDiqhathaniswa nobuchwepheshe obuvuthiwe bokukhipha ukukhanya.
Isakhiwo sedivayisi ye-Perovskite LED (phezulu kwesokunxele);
Ifomula yamakhemikhali ye-bipolar molecular stabilizer SFB10 (ngezansi kwesokunxele)
Ubudlelwano phakathi kwedivayisi ye-T50 impilo yonke kanye nokukhazimula (igrafu engakwesokudla)
Kodwa-ke, kufana namaseli elanga e-perovskite, ukungazinzi kwe-perovskite LED kuyinselele enkulu yokuqaphela izinhlelo zokusebenza zezimboni.Njengamanje, isikhathi sokuphila se-LED ye-perovskite ephezulu yokusebenza ngokuvamile ku-oda lamahora angu-10-100.Isikhathi sokuphila esidingekayo ukuze ubuchwepheshe be-OLED bungene embonini okungenani amahora angu-10,000.Kunezinselelo ezibalulekile kulokhu ngoba ama-semiconductors e-perovskite angase angazinzi ngokujulile.Kuhle ngobaIsibonisi se-LED.Isakhiwo sayo sekristalu sinezici ezibalulekile ze-ionic, futhi ama-ion ahamba kalula ngaphansi kwensimu kagesi esetshenziswayo ye-LED, okwenza izinto ziwohloke.
Muva nje, ithimba likaSolwazi David Di kanye nomcwaningi uZhao Baodan ovela ku-State Key Laboratory of Modern Optical Instruments, School of Optoelectronics, Zhejiang University kanye
I-International Research Centre ye-Advanced Photonics, i-Haining International Campus, yenze impumelelo ebalulekile kulokhu.Besebenzisa i-bipolar molecular stabilizer, bathole ukuphila okude kakhulu kokusebenza kuma-LED e-perovskite ahlangabezana nezidingo zezinhlelo zokusebenza ezingokoqobo.
"Lawa ma-perovskite LED aqhutshwa amandla amanje angu-5 mA/c㎡ izinyanga ezingu-5 ezilandelanayo (amahora angu-3600) ngaphandle kokwehla kokukhanya," kusho uDavid Dee.Umbono we-LED.NgobaP1.56Isibonisi se-LED.Lawa madivayisi azinzile kakhulu, futhi okunye ukuhlola okusaqhubekayo kubonakala kunzima ukukuqeda phakathi nonyaka noma ngaphezulu.Ukuze kutholwe idatha yokuphila konke phakathi nesikhathi esiphusile sokuhlola, ukuhlolwa kokuguga okusheshisiwe kwe-LED kufanele kwenziwe.”
Lawa ma-perovskite LED aseduze ne-infrared abonisa isikhathi eside sempilo yokusebenza.Isibonelo, ngokukhazimula kokuqala okungu-2.1 W sr-1 m-2 (okwamanje okungu-3.2 mA/c㎡), idivayisi elinganiselwe ye-T50 impilo yonke (isikhathi esisithathayo ukuze imisebe yokuqala yehle ibe ngu-50%) amahora angu-32675 ( Iminyaka engu-3.7).Amandla okubona ahlinzekwa yilokhu kukhanya afaniswa ne-OLED eluhlaza yokuhweba esebenza ngokukhanya okuphezulu okungu-1000 cd/m2.Ngokukhanya okuphansi okungu-0.21 W sr-1 m-2 (1/10 kokukhanya okungenhla) noma okwamanje okungu-0.7 mAc㎡, isikhathi sokuphila se-T50 silinganiselwa amahora ayizigidi ezingu-2.4 (cishe iminyaka engu-270).
"Sikholelwa ukuthi kuyadingeka ukwenza ukuhlaziya okuthembekile kwempilo yakho yonke le LED entsha, esiqoqe kuyo amaphuzu angu-62 edatha yokuphila konke kwamadivayisi ekuhlolweni kokuguga okusheshayo, okuhlanganisa ukuminyana okungaba khona okubanzi okungaba khona kobubanzi obungu-10-200 mA/c㎡."Kusho uGuo Bingbing.I-electroluminescence external quantum effective (EQE) kanye nokusebenza kahle kokuguqulwa kwamandla (ECE) kwedivayisi kufinyelele ku-22.8% no-20.7%, ngokulandelana, okuwukusebenza okuphezulu kakhulu kwe-perovskite LEDs eseduze ne-infrared.
Ababhali bathole ukuthi lezi zinto ze-perovskite luminescent zinezakhiwo zekristalu ezinzile kakhulu."Isakhiwo sekristalu sezinto ezibonakalayo asishintshile ngemuva kwezinsuku ezingaphezu kuka-322," kusho uZhao Baodan.
Ukusebenza isikhathi eside nokusheshisa ukuhlolwa kokuguga kwe-perovskite LEDs (isithombe esingakwesokunxele);
Idatha yangaphandle yokusebenza kahle kwe-quantum yokulawula kanye namadivayisi azinzile (iphaneli yesokudla)
"Lokhu kubonisa ukuthi i-bipolar molecular stabilizer isiza i-perovskite ukuthi igcine isigaba sayo sokuqala se-crystal esinezakhiwo ezinhle kakhulu ze-optoelectronic. Isakhiwo se-crystal samasampula e-perovskite okulawula ukuphathwa ashintshile kakhulu futhi awonakala phakathi kwamasonto amabili. "
Ukufuduka kwe-Ion kuma-perovskites kungenye yezinto ezibalulekile eziholela ekungazinzini, futhi le nkinga iba nkulu kakhulu ngaphansi kwethonya le-voltage esetshenzisiwe kuma-LED kanyeIsibonisi esincane se-LED."Ukuhlola kwethu nokubala kubonisa ukuthi ama-molecule e-bipolar adala izibopho zamakhemikhali noma ukusebenzisana nama-ion emingceleni yezinhlamvu ze-perovskite," kusho uGuo Bingbing, "okungase kube isizathu esenza ukufuduka kwe-ion kube nzima kuma-perovskites ethu. ngaphandle nabahlanganyeli bethu babonise ukucindezelwa kwesenzo sokunyakaza kwe-ion," kwengeza uZhao Baodan.
Imiphumela yempilo yedivayisi ibonisa ukuthi izinto ze-perovskite azinazo "izinkinga zofuzo" ngokuzinza."Ama-semiconductors amasha, njenge-metal halide perovskites, abhekwa kabanzi njengokungazinzile, ikakhulukazi ezindaweni zikagesi eziphakeme kakhulu, njengasezinhlelo zokusebenza ze-LED," kusho uDavid Dee."Imiphumela yethu ibonisa ukuthi ukufeza amadivaysi e-perovskite azinzile akuyona 'imishini engenakwenzeka'".
Ukuphila kwedivayisi okude kakhulu kulindeleke ukuthi kukhuphule ukuzethemba kunkambu ye-perovskite LED, njengoba kugcwalise imfuneko eyisisekelo yokuzinza kwama-OLED entengiso.Lawa ma-LED aseduze ne-infrared angasetshenziswa ezinhlelweni ezifana nezibonisi eziseduze ne-infrared, ukuxhumana, kanye nebhayoloji.Nakuba amadivaysi e-perovskite anokukhanya okubonakalayo anesikhathi eside sokuphila okufanayo kusazothuthukiswa, ukugcwaliseka kwe-ultra-stable perovskite LEDs kuvula indlela yobuchwepheshe be-perovskite luminescence ukuze bafake izicelo zezimboni.
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Ukubuka umphumela wokufuduka kwe-ion we-perovskite ngaphansi kwenkundla kagesi ngokuhlolwa kwe-microfluorescence imaging
Isikhathi sokuthumela: Aug-24-2022