Munguva pfupi yadarika, timu yaProfessor Xiao Zhengguo yekutsvagisa kubva kuChikoro cheFizikisi cheYunivhesiti yeSainzi neTekinoroji yeChina, iyo Key Labhoritari yeYakasimba Yakabatana Quantum Material Fizikisi yeChinese Academy yeSainzi uye Hefei National Research Center yeMicroscale Material Science yakaita zvakakosha. kufambira mberi mumunda wekugadzirira inoshanda uye yakagadzikana perovskite single crystalLEDs.

Chikwata chekutsvagisa chakakura zvemhando yepamusoro, yakakura-nzvimbo uye yakanyanya-yakaonda perovskite imwe makristasi nekushandisa nzira yekudzora nzvimbo, uye yakagadzirira perovskite single crystal LED nekupenya kunopfuura 86000 cd/m2 uye hupenyu hwekusvika 12500 h kekutanga, iyo yakatora nhanho yakakosha yakanangana nekushandiswa kweperovskite LED kumunhulighting. Izvo zvakabudirira zvakabudirira, zvine musoro unoti "Yakakwirira yakajeka uye yakagadzikana single-crystal perovskite light-emitting diodes", yakabudiswa muNature Photonics musi waFebruary 27.

Metal halide perovskite yave chizvarwa chitsva che LED kuratidza uye zvigadziriso zvekuvhenekesa nekuda kweiyo tunable wavelength, yakamanikana hafu-peak hupamhi uye yakaderera-tembiricha kugadzirira. Parizvino, iyo yekunze quantum performance (EQE) ye perovskite LED (PeLED) yakavakirwa papolycrystalline nhete firimu yakapfuura 20%, inofananidzwa neyekutengesa organic LED (OLED). Mumakore achangopfuura, hupenyu hwesevhisi yevakawanda vakashumwa yakakwirira-inoshanda perovskiteLED zvishandisokubva kumazana kusvika kuzviuru zvemaawa, ichiri kusarira kumashure kweOLED. Kugadzikana kwechigadzirwa kuchakanganiswa nezvinhu zvakadai sekufamba kweion, kusagadzikana kwekutakura kwekutakura uye kupisa kwejoule kunogadzirwa panguva yekushanda. Mukuwedzera, iyo yakakomba Auger recombination mu polycrystalline perovskite zvishandiso zvakare inodzikamisa kupenya kwemidziyo.

Mukupindura matambudziko ari pamusoro, timu yekutsvagisa yaXiao Zhengguo yakashandisa nzira yekudzora nzvimbo yekukura perovskite makristasi ega pane substrate in situ. Nekugadzirisa mamiriro ekukura, kuunza organic amines uye mapolymers, crystal quality yakagadziridzwa zvinobudirira, nokudaro kugadzirira yepamusoro-soro MA0.8FA0.2PbBr3 matete makristasi asina kusimba ane hushoma hutema hwe1.5 μ m. Kushata kwepamusoro kuri pasi pe 0.6 nm, uye yemukati fluorescence quantum goho (PLQYINT) inosvika 90%. Iyo perovskite single crystal LED mudziyo wakagadzirirwa nekristaro imwechete yakaonda sezvo mwenje unoburitsa mwenje une EQE ye11.2%, kupenya kunopfuura 86000 cd/m2, uye hupenyu hwe12500 h. Yakatanga kusvika pachikumbaridzo chekutengeserana, uye yave imwe yeakanyanya kugadzikana perovskite LED zvishandiso parizvino.

Basa riri pamusoro apa rinonyatsoratidza kuti kushandisa yakaonda perovskite crystal imwe chete sechiedza chinobudisa chiedza chigadziro chinogoneka kune dambudziko rekugadzikana, uye kuti perovskite single crystal LED ine tarisiro huru mumunda wekuvhenekera kwevanhu uye kuratidza.