Chiyambi: Chen Shuming ndi ena ochokera ku Southern University of Science and Technology apanga mndandanda wolumikizana ndi madontho otulutsa kuwala kwa madontho pogwiritsa ntchito transparent conductive indium zinc oxide ngati electrode yapakatikati. Diode imatha kugwira ntchito mosinthana ndi zabwino komanso zoyipa, ndi mphamvu zakunja za 20.09% ndi 21.15%, motsatana. Kuphatikiza apo, polumikiza zida zingapo zolumikizidwa, gululi limatha kuyendetsedwa mwachindunji ndi mphamvu zapakhomo za AC popanda kufunikira kwa mabwalo ovuta akumbuyo. Pansi pa 220 V/50 Hz, mphamvu ya pulagi yofiira ndi gulu lamasewera ndi 15.70 lm W-1, ndipo kuwala kosinthika kumatha kufika ku 25834 cd m-2.
Ma diode otulutsa kuwala (ma LED) asanduka ukadaulo wowunikira kwambiri chifukwa chakuchita bwino kwambiri, kutalika kwa moyo wautali, chitetezo champhamvu komanso chitetezo cha chilengedwe, kukwaniritsa kufunikira kwapadziko lonse lapansi pakugwiritsa ntchito mphamvu zamagetsi komanso kusungitsa chilengedwe. Monga semiconductor pn diode, LED imatha kugwira ntchito pansi pa gwero la low-voltage direct current (DC). Chifukwa cha jekeseni wa unidirectional komanso mosalekeza, zolipiritsa ndi kutentha kwa Joule zimadziunjikira mkati mwa chipangizocho, motero zimachepetsa kukhazikika kwa magwiridwe antchito a LED. Kuphatikiza apo, mphamvu zamagetsi padziko lonse lapansi zimachokera kumagetsi apamwamba kwambiri, ndipo zida zambiri zapakhomo monga nyali za LED sizitha kugwiritsa ntchito mwachindunji magetsi apamwamba kwambiri. Chifukwa chake, LED ikayendetsedwa ndi magetsi apanyumba, chosinthira chowonjezera cha AC-DC chimafunika ngati mkhalapakati kuti atembenuze mphamvu yamagetsi yamagetsi yamagetsi yamagetsi yamagetsi yamagetsi yamagetsi yamagetsi yamagetsi yamagetsi yotsika. Chosinthira chodziwika bwino cha AC-DC chimaphatikizapo thiransifoma yochepetsera magetsi a mains ndi chowongolera kuti mukonzenso zolowetsa za AC (onani Chithunzi 1a). Ngakhale kutembenuka kwamphamvu kwa otembenuza ambiri a AC-DC kumatha kufika pa 90%, pakadali kutaya mphamvu panthawi yosinthira. Kuonjezera apo, kuti musinthe kuwala kwa LED, dera loyendetsa galimoto lodzipereka liyenera kugwiritsidwa ntchito poyendetsa magetsi a DC ndikupereka magetsi abwino a LED (onani Supplementary Figure 1b).
Kudalirika kwa dera la dalaivala kudzakhudza kulimba kwa nyali za LED. Choncho, kuyambitsa otembenuza a AC-DC ndi madalaivala a DC sikungowonjezera ndalama zowonjezera (kuwerengera pafupifupi 17% ya mtengo wonse wa nyali za LED), komanso kumawonjezera kugwiritsa ntchito mphamvu ndikuchepetsa kukhazikika kwa nyali za LED. Choncho, kupanga zipangizo za LED kapena electroluminescent (EL) zomwe zingathe kuyendetsedwa mwachindunji ndi magetsi a 110 V / 220 V a 50 Hz / 60 Hz popanda kufunikira kwa zipangizo zamagetsi zovuta za backend ndizofunika kwambiri.
M'zaka makumi angapo zapitazi, zida zingapo zoyendetsedwa ndi AC-electroluminescent (AC-EL) zawonetsedwa. A AC electronic ballast imakhala ndi fulorosenti yotulutsa ufa wosanjikiza pakati pa zigawo ziwiri zotetezera (Chithunzi 2a). Kugwiritsa ntchito wosanjikiza kutchinjiriza kumalepheretsa jekeseni wa zonyamulira zakunja, kotero palibe chiwongolero chachindunji chomwe chikuyenda kudzera pa chipangizocho. Chipangizocho chili ndi ntchito ya capacitor, ndipo pansi pa galimoto yamagetsi a AC apamwamba, ma electron opangidwa mkati amatha kuyenda kuchokera kumalo ogwidwa kupita kumalo otsekemera. Atatha kupeza mphamvu zokwanira za kinetic, ma elekitironi amawombana ndi luminescent center, kupanga ma excitons ndi kutulutsa kuwala. Chifukwa cholephera kubaya ma elekitironi kuchokera kunja kwa maelekitirodi, kuwala ndi mphamvu ya zipangizozi ndizochepa kwambiri, zomwe zimalepheretsa ntchito zawo m'madera ounikira ndi kuwonetsera.
Pofuna kupititsa patsogolo ntchito yake, anthu apanga ma ballast amagetsi a AC okhala ndi chosanjikiza chimodzi (onani Supplementary Figure 2b). Mu kapangidwe kameneka, pamayendedwe abwino a theka la AC pagalimoto, chonyamulira chonyamulira chimalowetsedwa mwachindunji mugawo la emission kuchokera ku electrode yakunja; Kuwala kothandiza bwino kumatha kuwonedwa ndikuphatikizanso ndi mtundu wina wa chonyamulira chopangidwa mkati. Komabe, panthawi yolakwika ya theka la AC drive, zonyamula jekeseni zidzatulutsidwa kuchokera ku chipangizocho ndipo sizidzatulutsa kuwala. ndizotsika kuposa zida za DC. Kuphatikiza apo, chifukwa cha kuthekera kwa zida, magwiridwe antchito a electroluminescence pazida zonse ziwiri za AC amadalira pafupipafupi, ndipo magwiridwe antchito abwino nthawi zambiri amapezeka pama frequency apamwamba a kilohertz zingapo, zomwe zimapangitsa kuti zikhale zovuta kuti zigwirizane ndi mphamvu yapanyumba ya AC yotsika. pafupipafupi (50 hertz/60 hertz).
Posachedwapa, wina anakonza chipangizo chamagetsi cha AC chomwe chimatha kugwira ntchito pa 50 Hz/60 Hz. Chipangizochi chimakhala ndi zida ziwiri zofananira za DC (onani Chithunzi 2c). Mwa kuzunguliza maelekitirodi apamwamba pazida ziwirizi ndi magetsi ndikulumikiza ma elekitirodi apansi a coplanar ku gwero la mphamvu ya AC, zida ziwirizi zitha kuyatsidwa mosinthanasinthana. Poyang'ana dera, chipangizo ichi cha AC-DC chimapezedwa mwa kulumikiza chipangizo chamtsogolo ndi chipangizo chobwerera m'mbuyo. Chida chamtsogolo chikatsegulidwa, chipangizo chakumbuyo chimazimitsidwa, kukhala ngati chotsutsa. Chifukwa cha kukana, mphamvu ya electroluminescence ndiyotsika kwambiri. Kuphatikiza apo, zida zotulutsa kuwala kwa AC zimatha kugwira ntchito pang'onopang'ono ndipo sizingaphatikizidwe mwachindunji ndi 110 V / 220 V wamba magetsi apanyumba. Monga momwe zasonyezedwera mu Supplementary Figure 3 ndi Supplementary Table 1, kagwiridwe kake (kuwala ndi mphamvu yamagetsi) ya zida zamagetsi za AC-DC zomwe zanenedwa zoyendetsedwa ndi voteji yayikulu ya AC ndizotsika kuposa zida za DC. Pakalipano, palibe chipangizo chamagetsi cha AC-DC chomwe chingayendetsedwe mwachindunji ndi magetsi apakhomo pa 110 V / 220 V, 50 Hz / 60 Hz, ndipo imakhala ndi mphamvu zambiri komanso moyo wautali.
Chen Shuming ndi gulu lake ochokera ku Southern University of Science and Technology apanga mndandanda wolumikizana ndi madontho otulutsa madontho a quantum pogwiritsa ntchito transparent conductive indium zinc oxide ngati electrode yapakatikati. Diode imatha kugwira ntchito mosinthana ndi zabwino komanso zoyipa, ndi mphamvu zakunja za 20.09% ndi 21.15%, motsatana. Kuphatikiza apo, polumikiza zida zingapo zolumikizidwa, gululi litha kuyendetsedwa mwachindunji ndi mphamvu zapanyumba za AC popanda kufunikira kwa mabwalo ovuta a backend.Pansi pa 220 V / 50 Hz, mphamvu yamagetsi ya pulagi yofiira ndi gulu lamasewera ndi 15.70. lm W-1, ndi kuwala kosinthika kumatha kufika ku 25834 cd m-2. Pulagi yopangidwa ndi play quantum dot LED panel imatha kupanga magetsi oyendera ndalama, ophatikizika, ogwira mtima, komanso okhazikika omwe amatha kuyendetsedwa mwachindunji ndi magetsi apanyumba a AC.
Kuchokera ku Lightingchina.com
Nthawi yotumiza: Jan-14-2025