Haufinyane tjena, sehlopha sa lipatlisiso sa Moprofesa Xiao Zhengguo se tsoang Sekolong sa Fisiks sa Univesithi ea Saense le Theknoloji ea China, Laeborari ea Bohlokoa ea Strongly Coupled Quantum Material Physics ea China Academy of Sciences le Setsi sa Lipatlisiso sa Naha sa Hefei sa Saense ea Material ea Microscale e entse bohlokoa. tsoelo-pele tšimong ea ho lokisetsa kristale e le 'ngoe ea perovskite e sebetsang hantle le e tsitsitsengLi-LED.

Sehlopha sa lipatlisiso se eketsehile likristale tsa boleng bo holimo, tse kholo le tse tšesaane haholo tsa perovskite ka ho sebelisa mokhoa oa thibelo ea sebaka, 'me li lokiselitse perovskite single crystal LED e khanyang ho feta 86000 cd/m2 le bophelo ba ho fihlela ho 12500 h bakeng sa lekhetlo la pele, e nkileng mohato oa bohlokoa mabapi le tšebeliso ea perovskite LED ho bathokgantsha. Liphihlello tse amehang, tse nang le sehlooho se reng "Li-diode tse khanyang tse khanyang le tse tsitsitseng tsa single-crystal perovskite light-emitting diode", li phatlalalitsoe ho Nature Photonics ka February 27.

Metal halide perovskite e fetohile moloko o mocha oa pontšo ea LED le lisebelisoa tsa ho bonesa ka lebaka la bolelele ba eona bo ka khonehang, bophara bo fokolang ba halofo ea tlhōrō le ho itokisetsa mocheso o tlaase. Hona joale, katleho ea ka ntle ea quantum (EQE) ea perovskite LED (PeLED) e thehiloeng filimi e tšesaane ea polycrystalline e fetisitse 20%, e bapisoang le khoebo ea organic LED (OLED). Lilemong tsa morao tjena, bophelo ba tšebeletso ea boholo ba li-perovskite tse phahameng tse tlalehiloengLisebelisoa tsa LEDho tloha ho makholo ho isa ho likete tsa lihora, e ntse e salletse ka morao ho li-OLED. Ho tsitsa ha sesebelisoa ho tla angoa ke lintlha tse kang ho sisinyeha ha ion, ho kenngoa ka mokhoa o sa leka-lekaneng oa mokhanni le mocheso oa joule o hlahisoang nakong ea ts'ebetso. Ho phaella moo, recombination e tebileng ea Auger ka lisebelisoa tsa polycrystalline perovskite e boetse e fokotsa khanya ea lisebelisoa.

Ho arabela mathata a ka holimo, sehlopha sa lipatlisiso sa Xiao Zhengguo se sebelisitse mokhoa oa thibelo ea sebaka ho hōlisa likristale tse le 'ngoe tsa perovskite holim'a substrate in situ. Ka ho fetola maemo a ho hōla, ho hlahisa li-amine tsa manyolo le li-polymers, boleng ba kristale bo ile ba ntlafatsoa ka katleho, kahoo ba lokisetsa boleng bo phahameng ba MA0.8FA0.2PbBr3 likristale tse tšesaane tse le 'ngoe tse nang le bonyane botenya ba 1.5 μ m. Bokaholimo ba bokaholimo bo ka tlase ho 0.6 nm, 'me chai ea ka hare ea fluorescence quantum (PLQYINT) e fihla ho 90%. Sesebelisoa sa perovskite se nang le kristale se le seng sa LED se lokiselitsoeng ka kristale e le 'ngoe e tšesaane ha lesela le ntšang leseli le na le EQE ea 11.2%, khanya e fetang 86000 cd / m2, le bophelo bohle ba 12500 h. Qalong e fihlile moeling oa khoebo, 'me e fetohile e' ngoe ea lisebelisoa tsa LED tsa perovskite tse tsitsitseng ka ho fetisisa hona joale.

Mosebetsi o ka holimo o bontša ka ho feletseng hore ho sebelisa kristale e le 'ngoe ea perovskite e le' ngoe e le leseli le ntšang leseli ke tharollo e ka khonehang ea bothata ba botsitso, le hore perovskite single crystal LED e na le tebello e kholo tšimong ea mabone a batho le pontšo.