Vuba aha, itsinda ry’ubushakashatsi bwa Porofeseri Xiao Zhengguo wo mu Ishuri rya Fizika rya kaminuza y’ubumenyi n’ikoranabuhanga mu Bushinwa, Laboratoire y’ibanze ya Quantum Material Physics yo mu Ishuri Rikuru ry’Ubushinwa n’ikigo cy’ubushakashatsi cya Hefei gishinzwe ubumenyi bw’ibikoresho bya Microscale yagize akamaro kanini. amajyambere murwego rwo gutegura neza kandi ihamye perovskite imwe ya kristuLED.

Itsinda ry’ubushakashatsi ryakuze ryujuje ubuziranenge, ahantu hanini na ultra-thin perovskite kristu imwe ikoresheje uburyo bwo kugabanya umwanya, kandi itegura perovskite imwe ya kirisiti ya LED ifite umucyo urenga 86000 cd / m2 nubuzima bugera kuri 12500 h kuri ubwambere, yafashe intambwe yingenzi mugushira mubikorwa perovskite LED kubantukumurika. Ibyagezweho bijyanye, byiswe “Byinshi cyane kandi bihamye bya kirisiti ya perovskite itanga urumuri”, byasohotse muri Nature Photonics ku ya 27 Gashyantare.

Icyuma cya halide perovskite cyahindutse igisekuru gishya cyerekana LED hamwe nibikoresho byo kumurika bitewe nuburebure bwacyo buringaniye, ubugari bwa kimwe cya kabiri cyubugari no gutegura ubushyuhe buke. Kugeza ubu, kwantumasi yo hanze (EQE) ya perovskite LED (PeLED) ishingiye kuri firime yoroheje ya polycrystalline yarenze 20%, ugereranije na LED yubucuruzi (OLED). Mumyaka yashize, ubuzima bwa serivisi hafi ya zose zavuzwe hejuru-perovskiteIbikoresho bya LEDiri hagati yamasaha ibihumbi n'ibihumbi, iracyari inyuma ya OLEDs. Ihungabana ryibikoresho bizaterwa nimpamvu nko kugenda kwa ion, gushyiramo indege itaringaniye hamwe nubushyuhe bwa joule butangwa mugihe gikora. Mubyongeyeho, uburemere bukomeye bwa Auger mubikoresho bya polycrystalline perovskite nabyo bigabanya umucyo wibikoresho.

Mu gusubiza ibibazo byavuzwe haruguru, itsinda ry’ubushakashatsi bwa Xiao Zhengguo ryakoresheje uburyo bwo kugabanya umwanya kugira ngo rikure perovskite kristu imwe kuri substrate iri mu mwanya. Muguhindura imiterere yimikurire, kumenyekanisha amine kama na polymers, ubwiza bwa kristu bwarushijeho kunozwa, bityo hategurwa ubuziranenge bwo hejuru bwa MA0.8FA0.2PbBr3 kristu imwe yoroheje ifite uburebure bwa metero 1.5 m. Ubusumbane bwubuso buri munsi ya 0,6 nm, kandi umusaruro wa fluorescence wimbere (PLQYINT) ugera 90%. Igikoresho cya perovskite imwe ya kirisiti ya LED yateguwe hamwe na kirisiti ntoya nkuko urumuri rutanga urumuri rufite EQE ya 11.2%, umucyo urenga 86000 cd / m2, nubuzima bwa 12500 h. Yabanje kugera ku mbibi z’ubucuruzi, kandi yabaye kimwe mu bikoresho bihamye bya perovskite LED muri iki gihe.

Akazi kavuzwe haruguru karerekana neza ko gukoresha perovskite yoroheje imwe ya kirisiti nkurwego rutanga urumuri nigisubizo gishoboka cyikibazo cyumutekano, kandi ko perovskite imwe ya kirisiti LED ifite ibyiringiro byinshi mubijyanye no kumurika no kwerekana.