ʻIke i nā ala ʻenehana nui no nā LED keʻokeʻo no ke kukui
ʻO nā ʻano LED keʻokeʻo: ʻO nā ala ʻenehana nui no nā LED keʻokeʻo no ka hoʻomālamalama ʻana: 1 LED polū + ʻano phosphor; 2RGB LED ʻano; 3 LED ultraviolet + ʻano phosphor
1. Polū-LED puʻupuʻu + melemele-'ōmaʻomaʻo phosphor type loaʻa multi- waihoʻoluʻu phosphor derivative
Hoʻopili ka papa phosphor melemele-'ōmaʻomaʻo i kahi ʻāpana o ke kukui polū o ka chip LED e hoʻohua i ka photoluminescence, a ʻo ka ʻāpana ʻē aʻe o ke kukui uliuli mai ka chip LED e hoʻouna i ka papa phosphor a hui pū me ke kukui melemele-'ōmaʻomaʻo i hoʻokuʻu ʻia e ka phosphor ma. nā wahi like ʻole o ke ākea, a hui pū ka ʻulaʻula, ʻōmaʻomaʻo a me ka uliuli a lilo i kukui keʻokeʻo; Ma kēiaʻano,ʻaʻole eʻoi aku ka nui o ka waiwai o ka photoluminescence o ka hoʻololiʻana i ka pono o kekahi o nā kuantum o waho ma mua o 75%; a hiki i ka 70% wale nō ka unuhi ʻana o ka luminescence chip, no laila ke ʻano, keʻokeʻo ke kukui polū. ʻAʻole ʻoi aku ka maikaʻi o ke kukui LED ma mua o 340 Lm/W, ua hōʻea ʻo CREE i 303Lm/W i nā makahiki i hala, a he mea pono ke hoʻolauleʻa inā pololei nā hopena hōʻike.
2, ʻulaʻula, ʻōmaʻomaʻo a me ka uliuli ʻekolu hui ʻana o ka waihoʻoluʻu kumu RGB LED ʻano me ke ʻano RGBW-LED, etc.
R-LED (ʻulaʻula) + G-LED ('ōmaʻomaʻo) + B- LED (uliuli) Ua hui pū ʻia nā LED ʻekolu, a ua hui pololei ʻia ke kukui ʻulaʻula, ʻōmaʻomaʻo a me ka uliuli o nā waihoʻoluʻu kumu ʻekolu i loko o ke ākea e hana i ke kukui keʻokeʻo. I mea e hana ai i ke kukui keʻokeʻo kiʻekiʻe ma kēia ala, ʻo ka mea mua, ʻo nā LED o nā kala like ʻole, ʻoi aku ka nui o nā LED ʻōmaʻomaʻo, pono nā kumu kukui kiʻekiʻe, ʻo ia ka 69% ʻike ʻia mai "ke kukui keʻokeʻo". ua kiʻekiʻe loa ka maikaʻi o nā LED uliuli a me ka ʻulaʻula, a ʻoi aku ka maikaʻi o ka quantum kūloko ma luna o 90% a me 95%, i kēlā me kēia, akā ʻo ka pono quantum kūloko o nā LED ʻōmaʻomaʻo ma hope loa. ʻO ke ʻano o ka maikaʻi ʻole o ke kukui ʻōmaʻomaʻo LED e pili ana i ka GaN, ua kapa ʻia ʻo ia he "'ōmaʻomaʻo ʻōmaʻomaʻo." ʻO ke kumu nui ʻaʻole i loaʻa i ka LED ʻōmaʻomaʻo i kāna mea epitaxial ponoʻī. ʻO nā mea phosphorous-arsenic nitride series e loaʻa nei he haʻahaʻa haʻahaʻa i ka laulā melemele-'ōmaʻomaʻo, a hoʻohana ʻia ke kukui ʻulaʻula a i ʻole nā kukui uliuli epitaxial e hana i ka LED ʻōmaʻomaʻo. Ma nā kūlana haʻahaʻa haʻahaʻa o kēia manawa, ʻoi aku ka maikaʻi o nā LED ʻōmaʻomaʻo ma mua o ka uliuli + phosphor kukui ʻōmaʻomaʻo no ka mea ʻaʻohe phosphor hoʻololi nalowale. Ua hōʻikeʻia e hiki i ka 291 Lm / W i ka 291 Lm / W ma 1 mA. Akā naʻe,ʻo ka hopena o ka'ōmaʻomaʻo'ōmaʻomaʻo i hanaʻia e ka hopena Droop e ho'ēmi nuiʻia i kahi manawa nui, a ke hoʻonuiʻia ka nui o kēia manawa,ʻo ka hopena o ka māmā. hoemi koke ia. Ma kahi o 350 mA o kēia manawa, ʻo 108 Lm / W ka māmā o ka luminous, a ma lalo o ke kūlana o 1 A, hāʻule ka hana kukui i 66 Lm / W.
No ka hui III phosphides, ʻo ka hoʻokuʻu ʻana i ke kukui i ke kaula ʻōmaʻomaʻo e lilo i mea pale nui i ka ʻōnaehana waiwai. ʻO ka hoʻololi ʻana i ka haku mele ʻana o AlInGaP e ʻālohilohi ka ʻōmaʻomaʻo ma mua o ka ʻulaʻula, ʻalani a melemele paha—no ka lawa ʻole o ka hoʻopaʻa ʻana ma muli o ka haʻahaʻa haʻahaʻa o ka ikehu o ka ʻōnaehana mea, e hoʻopau ana i ka hoʻohui hou ʻana o ka radiative.
ʻO ka hoʻohālikelike, ʻoi aku ka paʻakikī o ka hui III nitrides, akā ʻaʻole hiki ke hoʻokō ʻia ka paʻakikī. Me kēia ʻōnaehana, ʻelua mau mea e hoʻemi ai i ka pono ma muli o ka hoʻonui ʻia ʻana o ka mālamalama i loko o ka ʻōmaʻomaʻo ʻōmaʻomaʻo, ʻo ia: ʻO ka emi ʻana o ka hoʻokō quantum o waho ka hopena ma muli o ka loaʻa ʻana o ka LED ʻōmaʻomaʻo i ka uila mua kiʻekiʻe o GaN, kahi e hoʻemi ai ka helu hoʻololi mana. ʻO ka lua o ka hemahema ʻo ia ka emi ʻana o ka LED ʻōmaʻomaʻo i ka piʻi ʻana o ka nui o ka injection, kahi i paʻa ʻia e ka hopena droop. Hōʻike pū ʻia ka hopena Droop i nā LED polū, akā ʻoi aku ka mea nui i nā LED ʻōmaʻomaʻo, e hopena i nā au hana haʻahaʻa. Eia nō naʻe, he nui nā kumu no ke kumu o ka hopena droop, ʻaʻole wale i ka hui Auger, akā, ʻo ka misplacement, overflow carrier a i ʻole leakage electron. Hoʻonui ʻia ka mea hope e kahi pā uila uila kūloko.
No laila, ke ala e hoʻomaikaʻi ai i ka pono luminous o nā LED ʻōmaʻomaʻo: ma ka ʻaoʻao hoʻokahi, pehea e hōʻemi ai i ka hopena Droop ma lalo o nā kūlana epitaxial e hoʻonui ai i ka pono māmā; ʻO ka lua o ka ʻaoʻao, ʻo ka hoʻololi ʻana o ka photoluminescence o ka LED polū a me ka phosphor ʻōmaʻomaʻo e hoʻopuka i ke kukui ʻōmaʻomaʻo, hiki i ke ala ke loaʻa i ke kukui ʻōmaʻomaʻo kiʻekiʻe, a hiki ke kiʻekiʻe ke kiʻekiʻe ma mua o ka hopena keʻokeʻo keʻokeʻo o kēia manawa, nona ka kukui ʻōmaʻomaʻo non-spontaneous, a ke emi nei ka maʻemaʻe kala ma muli o ka spectral broadening, he mea maikaʻi ʻole ia no ka hōʻike ʻana, akā no ka maʻamau ʻAʻohe pilikia me ka hoʻomālamalama. ʻO ka hopena kukui ʻōmaʻomaʻo i loaʻa ma kēia ʻano he hiki ke ʻoi aku ma mua o 340 Lm/W, akā ʻaʻole naʻe i ʻoi aku ma mua o 340 Lm/W ma hope o ka hui ʻana i ke kukui keʻokeʻo. ʻO ke kolu, e hoʻomau i ka noiʻi a loaʻa i kāna mea epitaxial ponoʻī, aia wale nō ma kēia ala, aia ka manaʻolana ma ka loaʻa ʻana o nā kukui ʻōmaʻomaʻo ma mua o 340 Lm / w, ʻo ke kukui keʻokeʻo i hui pū ʻia e ka ʻulaʻula, ʻōmaʻomaʻo a me ka uliuli ʻekolu mau kukui kumu mua. ʻoi aʻe ma mua o ka palena ʻoi aku ka maikaʻi o ke ʻano chip blue LED keʻokeʻo 340 Lm/W.
3.UV LED chip + ekolu kala kala phosphor kukui
ʻO ka hemahema koʻikoʻi o nā LED keʻokeʻo ʻelua ma luna nei, ʻo ia ka hāʻawi ʻole ʻana o ka luminosity a me ka chromaticity. ʻAʻole ʻike ʻia ke kukui ultraviolet e ka maka kanaka. No laila, ma hope o ka hoʻokuʻu ʻia ʻana o ke kukui ultraviolet mai ka chip, ua hoʻopili ʻia e nā phosphors kala mua ʻekolu o ka papa encapsulating, a ua hoʻololi ʻia ka photoluminescence o ka phosphor i ke kukui keʻokeʻo, a laila e hoʻokuʻu ʻia i loko o ke ākea. ʻO kēia kāna pono nui loa, e like me nā kukui fluorescent kuʻuna, ʻaʻohe ona kala kala ʻole. Eia naʻe, ʻaʻole hiki ke kiʻekiʻe ke kiʻekiʻe o ka hopena o ke kukui uila o ke ʻano keʻokeʻo ultraviolet ma mua o ka waiwai kumu o ke kukui keʻokeʻo polū, a ʻoi aku ka liʻiliʻi ma mua o ka waiwai o ke kukui keʻokeʻo RGB ʻano. Eia nō naʻe, aia wale nō ma o ka hoʻomohala ʻana i nā phosphors trichromatic kiʻekiʻe kūpono no ka hoʻoulu ʻana o nā kukui ultraviolet e hiki ai ke kiʻi i nā kukui keʻokeʻo ultraviolet-type keʻokeʻo LED kokoke a ʻoi aku ka maikaʻi ma mua o nā LED keʻokeʻo ʻelua. ʻO ka kokoke loa i nā kukui ultraviolet polū, hiki ke ʻoi aku ka nui o nā LED keʻokeʻo keʻokeʻo waena a me nā hawewe pōkole pōkole, ʻoi aku ka hiki ʻole.