I kēia mau lā, ua hana nui ka hui noiʻi a Professor Xiao Zhengguo mai ke Kula o Physics o ke Kulanui o ʻEpekema a me ʻenehana o Kina, ka Key Laboratory of Strongly Coupled Quantum Material Physics o ka Chinese Academy of Science a me ka Hefei National Research Center for Microscale Material Science. holomua i ke kahua o ka hoʻomākaukau pono a me ka paʻa perovskite kristal hookahiNā LED.

Ua ulu ka hui noiʻi kiʻekiʻe kiʻekiʻe, ʻāpana nui a me ka ultra-thin perovskite single crystals ma ka hoʻohana ʻana i ke ʻano kaohi ʻana o ka lewa, a hoʻomākaukau i ka perovskite hoʻokahi aniani LED me ka mālamalama o ʻoi aku ma mua o 86000 cd/m2 a me ke ola a hiki i 12500 h no ka ʻO ka manawa mua, kahi i hana nui i ka noi ʻana o perovskite LED i ke kanakakukui. ʻO nā hoʻokō kūpono, i kapa ʻia ʻo "High bright and stable single-crystal perovskite light-emitting diodes", i paʻi ʻia ma Nature Photonics ma Pepeluali 27.

Ua lilo ʻo Metal halide perovskite i hanauna hou o ka hōʻike LED a me nā mea kukui ma muli o kona lōʻihi haʻahaʻa haʻahaʻa, haiki hapalua ākea a me ka hoʻomākaukau haʻahaʻa haʻahaʻa. I kēia manawa, ua ʻoi aku ka maikaʻi o waho o ka quantum efficiency (EQE) o perovskite LED (PeLED) i hoʻokumu ʻia ma ka polycrystalline thin film i ʻoi aku ma mua o 20%, e hoʻohālikelike ʻia me nā LED organik (OLED). I nā makahiki i hala iho nei, ke ola lawelawe o ka hapa nui o ka perovskite kiʻekiʻe i hōʻike ʻiaNā mea hana LEDmai nā haneli a hiki i nā tausani hola, e waiho mau ana ma hope o nā OLED. E hoʻopili ʻia ka paʻa o ka hāmeʻa e nā mea e like me ka neʻe ʻana o ka ion, ka hoʻokomo ʻana i ka mea lawe ʻole a me ka wela joule i hana ʻia i ka wā o ka hana. Eia kekahi, ʻo ka hui hou Auger koʻikoʻi i nā polokalamu polycrystalline perovskite e kaupalena ʻia ka mālamalama o nā mea hana.

I ka pane ʻana i nā pilikia ma luna, ua hoʻohana ka hui noiʻi o Xiao Zhengguo i ke ʻano kaohi ʻana o ka lumi no ka ulu ʻana i nā kristal perovskite hoʻokahi ma ka substrate in situ. Ma ka hoʻololiʻana i nā kūlana ulu, hoʻokomo i nā amine organik a me nā polymers, ua hoʻomaikaʻi maikaʻiʻia ka maikaʻi o ke aniani, no laila e hoʻomākaukau ana i nā kristal kiʻekiʻe MA0.8FA0.2PbBr3 lahilahi me ka mānoanoa liʻiliʻi o 1.5 μm. ʻOi aku ka liʻiliʻi o ka ʻili ma mua o 0.6 nm, a hiki i ka 90%. ʻO ka perovskite single crystal LED mea hana i hoʻomākaukau ʻia me ka aniani hoʻokahi lahilahi e like me ka papa hoʻoheheʻe kukui he EQE o 11.2%, ʻoi aku ka mālamalama o 86000 cd/m2, a me ke ola o 12500 h. Ua hiki mua i ka paepae o commercialization, a ua lilo i kekahi o ka loa paʻa perovskite LED manaʻo i kēia manawa.

ʻO ka hana ma luna nei e hōʻike pono ana i ka hoʻohana ʻana i ka aniani perovskite lahilahi e like me ka papa kukui e hoʻonā i ka pilikia paʻa, a ʻo kēlā perovskite hoʻokahi aniani LED he manaʻo nui i ke kula o ke kukui kanaka a me ka hōʻike.