Nā kiko kuantum a me ka encapsulation
Ma ke ʻano he mea nano hou, ʻo nā quantum dots (QDs) he hana koʻikoʻi ma muli o kona ʻano nui.ʻO ke ʻano o kēia mea he spherical a quasi-spherical, a ʻo ke anawaena o ia mea mai 2nm a 20nm.He nui nā pono o nā QD, e like me ka spectrum excitation ākea, spectrum emission haiki, ka neʻe ʻana o Stokes nui, ke ola fluorescent lōʻihi a me ka biocompatibility maikaʻi, ʻoi aku ka nui o ka spectrum emission o QDs hiki ke uhi i ka laulā kukui ʻike ʻia ma o ka hoʻololi ʻana i kona nui.
Ma waena o nā mea luminescent QDs like ʻole, ua hoʻopili ʻia nā Ⅱ~Ⅵ QD me CdSe i nā noi ākea ma muli o ko lākou ulu wikiwiki ʻana.ʻO ka hapalua o ka laulā o ka Ⅱ ~ Ⅵ QDs mai 30nm a 50nm, hiki ke emi ma lalo o 30nm i nā kūlana synthesis kūpono, a ʻo ka fluorescence quantum yield o lākou kokoke i 100%.Eia naʻe, ʻo ka hiki ʻana o Cd i kaupalena i ka hoʻomohala ʻana o nā QD.ʻO ka Ⅲ~Ⅴ QDs ʻaʻohe Cd i hoʻomohala nui ʻia, ʻo ka fluorescence quantum yield o kēia mea ma kahi o 70%.ʻO ka hapalua o ka laulā o ke kukui ʻōmaʻomaʻo InP/ZnS he 40 ~ 50 nm, a ʻo ke kukui ʻulaʻula InP/ZnS ma kahi o 55 nm.Pono e hoʻomaikaʻi ʻia ka waiwai o kēia mea.I kēia mau lā, ʻo nā ABX3 perovskites ʻaʻole pono e uhi i ke ʻano o ka pūpū ua huki nui ʻia.Hiki ke hoʻololi ʻia ka lōʻihi o ka hawewe o lākou i ka mālamalama ʻike maʻalahi.ʻOi aku ka nui o ka fluorescence quantum yield o ka perovskite ma mua o 90%, a ʻo ka laulā hapa-peak ma kahi o 15nm.Ma muli o ka gamut kala o nā mea luminescent QD hiki i ka 140% NTSC, loaʻa kēia ʻano mea i nā noi maikaʻi i ka mea luminescent.ʻO nā noi nui i hoʻokomo ʻia ma kahi o ka phosphor earth rare e hoʻopuka i nā kukui he nui nā kala a me nā kukui i loko o nā electrodes kiʻiʻoniʻoni lahilahi.
Hōʻike nā QD i ka waihoʻoluʻu māmā ma muli o kēia mea hiki ke loaʻa ka spectrum me ka lōʻihi o ka nalu ma ke kula kukui, ʻo ka hapalua o ka laulā o ka lōʻihi o ka nalu ma lalo o 20nm.He nui nā hiʻohiʻona o nā QD, ʻo ia hoʻi ka waihoʻoluʻu hiki ke hoʻololi ʻia, ka spectrum hoʻokuʻu haiki, ka hua nui fluorescence kiʻekiʻe.Hiki iā lākou ke hoʻohana e hoʻonui i ka spectrum i nā kukui LCD a hoʻomaikaʻi i ka mana hōʻike kala a me ka gamut o LCD.
ʻO nā ʻano hana encapsulation o QD penei:
1）On-chip: hoʻololi ʻia ka pauka fluorescent kuʻuna e nā mea luminescent QDs, ʻo ia ke ʻano encapsulation nui o QDs i ke kahua kukui.ʻO ka pōmaikaʻi o kēia ma ka chip he liʻiliʻi ka nui o ka waiwai, a ʻo ka hemahema o nā mea pono ke kūpaʻa kiʻekiʻe.
2）Ma ka ʻaoʻao: hoʻohana nui ʻia ke ʻano i ka backlight.Hana ʻia ke kiʻi ʻoniʻoni i nā QD, aia ma luna o LGP i BLU.Eia nō naʻe, ʻo ke kumukūʻai kiʻekiʻe o ka wahi nui o ke kiʻi ʻoniʻoni i kaupalena ʻia nā noi nui o kēia ʻano.
3）Ma ka ʻaoʻao: ua hoʻopili ʻia nā mea QDs e wehe, a kau ʻia ma ka ʻaoʻao o ke kaula LED a me LGP.Ua hōʻemi kēia ʻano hana i nā hopena o ka radiation thermal a me ka optical i hoʻokumu ʻia e nā LED polū a me nā mea luminescent QDs.Eia kekahi, hoʻemi ʻia ka hoʻohana ʻana i nā mea QD.
