Perovskite light-emitting diode (perovskite LED) bụ ọgbọ ọhụrụ nke teknụzụ na-enye ọkụ nwere ikike dị ukwuu na ngosipụta, ọkụ, nkwurịta okwu na mpaghara ndị ọzọ.Perovskite LEDs nwere ọnụ ahịa mmepụta dị ala yana uru teknụzụ dị ịrịba ama: ha nwere njirimara nke ịdị ọkụ, ịdị nro na mgbanwe dị ka OLEDs, ma nweekwa ịdị ọcha nke agba na ntụgharị ihu igwe na III-V semiconductor LEDs.Mgbe naanị afọ ole na ole nke mmepe, arụmọrụ nke perovskiteIgwe ọkụdị ka nke teknụzụ ndị tozuru oke na-enye ọkụ.
Ọdịdị ngwaọrụ Perovskite LED (n'elu aka ekpe);
Usoro kemịkalụ nke bipolar molecular stabilizer SFB10 (ala aka ekpe)
Mmekọrịta dị n'etiti ngwaọrụ T50 oge ndụ yana radiance (graph aka nri)
Otú ọ dị, dị ka perovskite solar cell, enweghị ike nke perovskite LED bụ nnukwu ihe ịma aka maka ịchọta ngwa mmepụta ihe.Ugbu a, ndụ ndụ nke elu-arụmọrụ perovskite LED bụ n'ozuzu na usoro nke 10-100 awa.Ogologo ndụ achọrọ maka teknụzụ OLED iji banye n'ime nrụpụta bụ opekata mpe awa 10,000.Enwere nnukwu ihe ịma aka na ntụzịaka a n'ihi na semiconductor perovskite nwere ike ghara ịdị n'otu n'otu.Ọ dị mma makaNgosipụta LED.Ọdịdị kristal ya nwere njirimara ionic dị ịrịba ama, na ions na-agagharị n'ụzọ dị mfe n'okpuru ọkụ eletrik etinyere nke LED, na-eme ka ihe ahụ na-eweda ala.
Na nso nso a, otu Prọfesọ David Di na onye nyocha Zhao Baodan sitere na State Key Laboratory of Modern Optical Instruments, School of Optoelectronics, Zhejiang University na
Ụlọ ọrụ nyocha mba ụwa nke Advanced Photonics, Haining International Campus, emeela ọganihu dị mkpa na ntụziaka a.Iji bipolar molecular stabilizer, ha nwetara ultra-ogologo arụ ọrụ ndụ na perovskite LED nke na-egbo mkpa nke ngwa bara uru.
"Ndị a perovskite LEDs bụ nke 5 mA / c㎡ na-ebugharị mgbe niile maka ọnwa 5 n'usoro (awa 3600) na-enweghị nkwụsị ọkụ," David Dee kwuru.Ikike nghọta.MakaP1.56Ngosipụta LED.Ngwaọrụ ndị a kwụsiri ike, ụfọdụ nnwale ndị ka na-aga n'ihu yiri ka ọ siri ike imecha n'ime otu afọ ma ọ bụ karịa.Iji nweta data ndụ ndụ n'ime oge nnwale ezi uche dị na ya, ọ dị mkpa ka emee nnwale ịka nká ngwa ngwa LED. "
Igwe ọkụ perovskite infrared ndị a dị nso na-egosipụta ogologo ndụ na-arụ ọrụ ogologo oge.Dịka ọmụmaatụ, site na nchapụta mbụ nke 2.1 W sr-1 m-2 (ugbu a nke 3.2 mA / c㎡), ngwaọrụ atụmatụ T50 oge ndụ (oge ọ na-ewe maka radiance mbụ iji belata ruo 50%) bụ awa 32675 ( 3.7 afọ).Ike ngwa anya nke radiance a nyere dị ka OLED akwụkwọ ndụ akwụkwọ ndụ na-azụ ahịa na-arụ ọrụ na nchapụta dị elu nke 1000 cd/m2.Na nchapụta dị ala nke 0.21 W sr-1 m-2 (1/10 nke nchapụta dị n'elu) ma ọ bụ ugbu a nke 0.7 mAc㎡, a na-eme atụmatụ ndụ T50 ka ọ bụrụ awa 2.4 nde (ihe dị ka afọ 270).
"Anyị kwenyere na ọ dị mkpa ịme nyocha ndụ a pụrụ ịdabere na ya nke LED ọhụrụ a, nke anyị na-anakọta 62 data data ndụ oge niile na nyocha ịka nká, na-ekpuchi oke njupụta ugbu a nke 10-200 mA / c㎡."Guo Binging kwuru.The electroluminescence external quantum efficiency (EQE) na ike ntụgharị arụmọrụ (ECE) nke ngwaọrụ ruru 22.8% na 20.7%, n'otu n'otu, nke kasị elu arụmọrụ nke nso-infrared perovskite LEDs.
Ndị na-ede akwụkwọ chọpụtara na ihe ndị a na-egbuke egbuke nke perovskite nwere ihe owuwu kristal kwụsiri ike."Ụdị kristal nke ihe ahụ agbanwebeghị mgbe ihe karịrị ụbọchị 322," Zhao Baodan kwuru.
Ogologo oge na-arụ ọrụ na nyocha ịka nká nke perovskite LEDs (onyinyo aka ekpe);
Data arụmọrụ nke mpụga nke njikwa yana ngwaọrụ kwụsiri ike (panel aka nri)
"Nke a na-egosi na bipolar molecular stabilizer na-enyere ndị perovskite aka ịnọgide na-enwe mbụ crystal na-adọ na magburu onwe optoelectronic Njirimara. The crystal Ọdịdị nke mesoo akara perovskite samples gbanwere nke ukwuu na degraded n'ime izu abụọ."
Mbugharị ion na perovskites bụ otu n'ime ihe ndị dị mkpa na-eduga na enweghị ntụkwasị obi, na nsogbu a na-aghọwanye njọ n'okpuru mmetụta nke etinyere voltaji na LEDs naObere LED ngosi."Nnwale anyị na ngụkọ na-egosi na ụmụ irighiri ihe bipolar na-emepụta njikọ kemịkalụ ma ọ bụ mmekọrịta ya na ions na oke ọka perovskite," Guo Bingbing kwuru, "nke nwere ike ịbụ ihe kpatara ịkwaga ion na-esi ike na perovskites anyị. "Nnwale eletriki na nyocha anya anyị mere. Ya na ndị anyị na ha na-emekọ ihe egosila nkwụsị nke ihe mmegharị ion," Zhao Baodan kwukwara.
Nsonaazụ ndụ ngwaọrụ na-egosi na ihe ndị perovskite enweghị "mmebi mkpụrụ ndụ ihe nketa" na nkwụsi ike."Semiconductors ọhụrụ, dị ka metal halide perovskites, bụ nke a na-ewere dị ka ndị na-adịghị eguzosi ike n'ihe, karịsịa na mpaghara eletrik dị elu, dị ka na ngwa LED," ka David Dee kwuru."Nsonaazụ anyị na-egosi na ịnweta ngwaọrụ perovskite kwụsiri ike abụghị 'ọrụ agaghị ekwe omume'".
A na-atụ anya na oge ndụ ngwaọrụ dị ogologo ga-eme ka ntụkwasị obi dị n'ọhịa perovskite LED, n'ihi na ọ mezuru ihe bụ isi nke nkwụsi ike maka OLEDs azụmahịa.Enwere ike iji ọkụ ọkụ infrared ndị a dị nso na ngwa dị ka ngosipụta infrared nso, nkwukọrịta, na bayoloji.Ọ bụ ezie na ngwaọrụ perovskite a na-ahụ anya nke nwere ogologo ndụ ndị yiri ya ga-anọgide na-emepụta, mmezu nke ultra-stable perovskite LEDs na-emeghe ụzọ maka perovskite luminescence technology ịbanye ngwa mmepụta ihe.
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Nleba anya mmetụta mbugharị ion nke perovskite n'okpuru ọkụ eletrik site na nnwale imaging microfluorescence
Oge nzipu: Ọgọst-24-2022