Kua hurihia e te rama LED tuku iho te ao o te rama me te whakaaturanga nā te mea he pai ake te mahi i runga i te whai huatanga, te pumau me te rahi o te taputapu. Ko ngā rama LED he puranga kiriata semiconductor angiangi me ngā taha o te mirimita, he iti ake i ngā taputapu tuku iho pēnei i ngā pūangi incandescent me ngā ngongo cathode. Heoi, ko ngā tono optoelectronic hou, pēnei i te mooni mariko me te mooni whakanuia, me whai rama LED i te rahi o te maikoroni, iti iho rānei. Ko te tumanako kia mau tonu ngā rama LED iti-iti, iti-maikoroni rānei (µled) i ngā āhuatanga pai kua mau i ngā rama LED tuku iho, pēnei i te tukunga tino pumau, te whai huatanga me te kanapa teitei, te iti rawa o te kai hiko, me te tukunga tae-katoa, i te mea he iti ake te horahanga, e taea ai te whakaatu kiato ake. Ka taea hoki e ēnei maramara rama LED te whakatakoto huarahi mō ngā ara iahiko photonic kaha ake mēnā ka taea te whakatipu i te maramara kotahi ki runga i te Si me te whakauru ki ngā hiko semiconductor waikura whakarewa (CMOS).
Heoi, tae noa mai ki tēnei wā, kāore anō kia kitea ēnei µled, inā koa i roto i te whānuitanga o ngā roangaru tukunga kakariki ki te whero. Ko te huarahi tuku iho a te µ-led he tukanga mai i runga ki raro, e whakairohia ana ngā kiriata puna quantum (QW) InGaN ki roto i ngā taputapu tauine iti mā te tukanga whakairo. Ahakoa kua aro nui te aro ki ngā µled tio2 InGaN QW-kiriata angiangi nā te maha o ngā āhuatanga pai o InGaN, pērā i te kawe kawe whai hua me te whakarerekētanga roangaru puta noa i te whānuitanga e kitea ana, tae noa mai ki tēnei wā kua pāngia rātou e ngā take pērā i te kino o te waikura taha-paki e kino haere ana i te mea ka iti haere te rahi o te taputapu. Hei tāpiri, nā te noho o ngā mara polarization, he kore pumau te roangaru/tae. Mō tēnei raruraru, kua whakaarohia ngā otinga InGaN kore-polar me te haurua-polar me te kōhao karaihe photonic, engari kāore i te pai i tēnei wā.
I roto i tētahi pepa hou i whakaputaina ki roto i te Light Science and Applications, kua whakawhanakehia e ngā kairangahau i arahina e Zetian Mi, he ahorangi i te Whare Wānanga o Michigan, a Annabel, he LED matomato iii – nitride tauine iti-micron e wikitoria ana i ēnei arai mō ake tonu atu. I hangaia ēnei µled mā te epitaxy hihi ngota ā-rohe kua tohua e te plasma. He rerekē rawa ki te huarahi tuku iho mai i runga ki raro, ko te µled i konei he huinga o ngā nanowires, ia ia he 100 ki te 200 nm te whānui, e wehea ana e ngā tekau nanometer. Ko tēnei huarahi mai i raro ki runga ka karo i te kino o te waikura o te pakitara taha.
Ko te wāhanga e whakaputa ana i te mārama o te taputapu, e mōhiotia ana ko te rohe hohe, he mea tito mai i ngā hanganga puna maha-kuantum (MQW) o te anga-matua e tohuhia ana e te āhua o te waea nano. Ina koa, ko te MQW he mea tito mai i te puna InGaN me te ārai AlGaN. Nā te rerekētanga o te hekenga ngota i mimitihia o ngā huānga Rōpū III, arā, te indium, te gallium me te konumohe i ngā pakitara taha, i kitea e mātou kāore he indium i ngā pakitara taha o ngā waea nano, i reira ka takai te anga GaN/AlGaN i te matua MQW pērā i te burrito. I kitea e ngā kairangahau ka heke haere te ihirangi Al o tēnei anga GaN/AlGaN mai i te taha werohanga irahiko o ngā waea nano ki te taha werohanga kōhao. Nā te rerekētanga o ngā mara pōraihana ā-roto o GaN me AlN, ka puta mai i taua rōrahi o te ihirangi Al i roto i te paparanga AlGaN ngā irahiko kore utu, he ngāwari ki te rere ki roto i te matua MQW, ā, ka whakaiti i te kore pumau o te tae mā te whakaiti i te mara pōraihana.
Ina hoki, kua kitea e ngā kairangahau mō ngā taputapu he iti iho i te kotahi maikorona te whānui, ka noho tonu te roangaru tihi o te electroluminescence, te tukunga mārama i puta mai i te au, i runga i te raupapa o te nui o te huringa o te weronga au. Hei tāpiri, kua whakawhanakehia e te tīma a Ahorangi Mi tētahi tikanga mō te whakatipu i ngā paninga GaN kounga teitei ki runga i te silicon hei whakatipu i ngā LED nanowire ki runga i te silicon. Nō reira, ka noho he µled ki runga i tētahi papa Si kua rite mō te whakauru ki ētahi atu hiko CMOS.
He maha ngā whakamahinga pea o tēnei µled. Ka kaha ake te tūāpapa o te taputapu ina whānui haere te roangaru tukunga o te whakaaturanga RGB whakauru i runga i te maramara ki te whero.
Wā tuku: Hanuere-10-2023