Tsis ntev los no, ib pab neeg tshawb fawb los ntawm Xiamen University innovatively tsim ib tug chamfered pyramid / rooj -zoo li tus nanostructure. Los ntawm kev ua ke ntawm nanoimprinting, qhuav etching tshuab thiab ntub etching txheej txheem, lub teeb emission wavelength yog luv li 234 nm (AlN ) 8 / (GaN) 2 Cov txheej txheem active (0001), (10-13) thiab (20- 21) pawg siv lead ua dav hlau nrog cov kaum ntse tswj tau zoo. Qhov zoo siab, cov dav hlau siv lead ua no tuaj yeem tswj hwm kev nthuav tawm thiab rho tawm hom kev sib sib zog nqus ultraviolet lub teeb nthwv dej hauv nanostructures, ua haujlwm tau zoo los ntawm kev txwv ntawm lub kaum sab xis me me ntawm lub teeb tawm hauv cov qauv txheej txheem ib txwm muaj, thiab txhim kho cov txiaj ntsig ntawm kev sib sib zog nqus ultraviolet lub teeb.
Cov kev tshawb fawb qhia tau hais tias tom qab kev taw qhia ntawm lub ntsej muag siv lead ua - tswj tau inverted pyramid / rooj qauv, TM thiab TE polarized lub teeb tau txhim kho los ntawm 5.6 npaug thiab 1.1 zaug, feem, piv nrog cov qauv qauv, thiab tag nrho cov luminous Kev siv ntawm qhov sib sib zog nqus ultraviolet wavelength ntawm 234 nm yog nce los ntawm ze li ntawm 2 feem pua. sij hawm. Qhov kev tshawb fawb no muab lub tswv yim tshiab rau kev txhim kho kev ua haujlwm ntawm kev sib sib zog nqus ultraviolet luv luv-wave light-emitting li, thiab xav tias yuav txuas ntxiv mus rau optoelectronic li xws li micro- LEDs loj thiab tob ultraviolet detectors.
Daim duab 1. (a) Schematic daim duab ntawm cov txheej txheem fabrication ntawm nanopore arrays los ntawm nanoimprinting; (b)-(c) Cov yam ntxwv ntawm (AlN)8/(GaN)2 ultrashort- lub sij hawm superlattices; (d)-(f) Microscopic duab ntawm nanoholes thiab (g)-(h) inverted pyramid/ rooj nanohole arrays
Daim duab 2. (a) Photoluminescence spectra ntawm pa planar, ncig nanoholes thiab chamfered pyramid/ rooj nanoholes; (b) Internal quantum efficiency, TE / TM lub teeb extraction efficiency thiab tag nrho cov luminous siv li ntawm peb nanostructures Factor tis zaj duab xis.
The related research results were published in the Royal Society of Chemistry journal Nanoscale under the title of "Enhancing deep-UV emission at 234 nm by introducing a truncated pyramid AlN/GaN nanostructure with fine-tuned multiple facets" and recommended as the cover research work of the journal ( Back Inside Cover). The relevant testing work was supported by the research group of Professor Yang Zhizhong of National Taiwan University.
