Jaamacadda Peking waxay ogaatay perovskite joogto ahIsha laysarkaka yar 1 maykron laba jibbaaran
Waa muhiim in la dhiso ilo laysar oo joogto ah oo leh aag qalab oo ka yar 1μm2 si loo daboolo baahida isticmaalka tamarta yar ee isku xirka indhaha ee chip-ka (<10 fJ bit-1). Si kastaba ha ahaatee, marka cabbirka qalabku hoos u dhaco, khasaaraha indhaha iyo walxaha ayaa si weyn u kordha, sidaa darteed gaaritaanka cabbirka qalabka sub-micron iyo bamgareynta indhaha ee joogtada ah ee ilaha laysarka waa mid aad u adag. Sannadihii ugu dambeeyay, walxaha halide perovskite waxay heleen fiiro gaar ah oo ku saabsan laysarka indhaha ee si joogto ah loo bamgareeyay sababtoo ah faa'iidada sare ee indhaha iyo sifooyinka gaarka ah ee exciton polariton. Aagga qalabka ee ilaha laysarka joogtada ah ee perovskite ee ilaa hadda la soo sheegay wali waa ka weyn yahay 10μm2, ilaha laysarka submicron-na dhammaantood waxay u baahan yihiin iftiin garaac leh oo leh cufnaanta tamarta bamka oo sareysa si loo kiciyo.
Iyadoo laga jawaabayo caqabaddan, kooxda cilmi-baarista ee Zhang Qing oo ka socota Dugsiga Sayniska iyo Injineerinka Qalabka ee Jaamacadda Peking ayaa si guul leh u diyaarisay walxo keli ah oo tayo sare leh oo perovskite submicron ah si loo gaaro ilo laser ah oo joogto ah oo leh meel qalab ah oo u dhiganta 0.65μm2. Isla mar ahaantaana, waxaa la ogaaday sawirka. Habka loo isticmaalo exciton polariton ee habka lasing-ka ee si toos ah loogu shubo indhaha ee submicron si qoto dheer ayaa loo fahmay, taas oo bixisa fikrad cusub oo loogu talagalay horumarinta laser-yada semiconductor-ka ee cabbirka yar ee hooseeya. Natiijooyinka daraasadda, oo cinwaan looga dhigay "Laysarrada Perovskite ee Mowjadaha Joogtada ah ee lagu shubo oo leh Aagga Qalabka oo ka hooseeya 1 μm2," ayaa dhawaan lagu daabacay Qalabka Sare.
Shaqadan, xaashida micron-ka keli ah ee perovskite CsPbBr3 ee aan organic ahayn ayaa lagu diyaariyey substrate sapphire ah iyadoo la adeegsanayo kaydinta uumiga kiimikada. Waxaa la arkay in isku-xidhka xooggan ee excitons-ka perovskite iyo photons-ka microcavity-ga derbiga codka heerkulka qolka uu keenay sameynta polariton excitonic. Iyada oo loo marayo taxane caddayn ah, sida xoojinta qiiqa toosan ilaa aan toosnayn, ballaca xariiqda cidhiidhiga ah, isbeddelka polarization-ka qiiqa iyo isbeddelka isku-xidhka booska ee heerka, lase-ka iftiinka ee joogtada ah ee indhaha lagu shubo ee crystal-ka keli ah ee CsPbBr3 ee cabbirka hoose-micron ayaa la xaqiijiyay, aagga qalabkuna waa hooseeyaa ilaa 0.65μm2. Isla mar ahaantaana, waxaa la ogaaday in heerka isha laysarka submicron uu la mid yahay kan isha laysarka cabbirka weyn, xitaa wuu ka hooseeyaa (Jaantuska 1).
Jaantuska 1. Submicron-ka si joogto ah loogu shubay indhaha CsPbBr3isha iftiinka laysarka
Intaa waxaa dheer, shaqadani waxay sahamisaa labadaba tijaabo ahaan iyo aragti ahaanba, waxayna muujineysaa habka excitons-ka excitons-ka ee loo yaqaan 'exciton-polarized excitons' ee hirgelinta ilaha laser-ka ee joogtada ah ee submicron. Isku-xidhka photon-exciton ee la xoojiyay ee submicron perovskites wuxuu keenaa koror weyn oo ku yimaada tusmada refractive-ka kooxda ilaa qiyaastii 80, taas oo si weyn u kordhisa faa'iidada qaabka si loo magdhabo khasaaraha qaabka. Tani waxay sidoo kale keentaa isha laser-ka submicron perovskite oo leh qodob tayo sare leh oo microcavity ah iyo ballaca qiiqa oo cidhiidhi ah (Jaantuska 2). Farsamadu waxay sidoo kale bixisaa aragtiyo cusub oo ku saabsan horumarinta laser-yada cabbirka yar, kuwa hoose ee ku salaysan agabka kale ee semiconductor-ka.
Jaantuska 2. Habka isha laysarka ee sub-micron iyadoo la adeegsanayo polarizons excitonic ah
Song Jiepeng, oo ah arday sanadkii 2020 Zhibo ah oo ka tirsan Dugsiga Sayniska Qalabka iyo Injineerinka ee Jaamacadda Peking, ayaa ah qoraagii ugu horreeyay ee warqadda, Jaamacadda Peking-na waa cutubka ugu horreeya ee warqadda. Zhang Qing iyo Xiong Qihua, oo ah borofisar Fiisigis ah oo ka tirsan Jaamacadda Tsinghua, ayaa ah qorayaasha u dhigma. Shaqada waxaa taageeray Hay'adda Qaranka ee Sayniska Dabiiciga ah ee Shiinaha iyo Hay'adda Sayniska Beijing ee Dhalinyarada Wanaagsan.
Waqtiga boostada: Sebtembar-12-2023