Lead-free halide double perovskite has received widespread attention due to its excellent optical performance.However,the lack of deep red light and poor heat quenching resistance severely limit its application in pla...Lead-free halide double perovskite has received widespread attention due to its excellent optical performance.However,the lack of deep red light and poor heat quenching resistance severely limit its application in plant lighting field.In this work,Ho^(3+) was introduced into the thermally stable Cs_(2)NaScCl_(6)host,exhibiting a deep red emission of 660 nm.By constructing an energy transfer channel between Sb^(3+)and Ho^(3+),the photo luminescence quantum yield(PLQY) of Cs_(2)NaScCl_(6):1%Sb^(3+),40%Ho^(3+) rises up to53.8%,that is increased by 17 times,and its emission intensity can still be maintained by 80% at 423 K,exhibiting good heat quenching resistance.The obtained Cs_(2)NaScCl_(6):1%Sb^(3+),40%Ho^(3+) and Cs_(2)NaScCl_(6):1%Sb^(3+) with blue light emission were employed for fabricating a light-emitting diode(LED) device with a340 nm UV chip,and its emission spectrum matches well the absorption spectra of chlorophyll A and chlorophyll B with the high resemblance of 70% and 75%,making it suitable for use as an artificial light source to control the growth process of plants in the field of plant lighting.展开更多
基金Project supported by the National Natural Science Foundation of China (12174042)the Science and Technology Research Program of Chongqing Municipal Education Commission (KJQN202201338,KJZDM201901301)+1 种基金the Chongqing Talent Plan (CQYC202003058)Fund for Creative Research Group of Micro-Nano Semiconductor & Photonic Materials of Chongqing Municipal Education Commission。
文摘Lead-free halide double perovskite has received widespread attention due to its excellent optical performance.However,the lack of deep red light and poor heat quenching resistance severely limit its application in plant lighting field.In this work,Ho^(3+) was introduced into the thermally stable Cs_(2)NaScCl_(6)host,exhibiting a deep red emission of 660 nm.By constructing an energy transfer channel between Sb^(3+)and Ho^(3+),the photo luminescence quantum yield(PLQY) of Cs_(2)NaScCl_(6):1%Sb^(3+),40%Ho^(3+) rises up to53.8%,that is increased by 17 times,and its emission intensity can still be maintained by 80% at 423 K,exhibiting good heat quenching resistance.The obtained Cs_(2)NaScCl_(6):1%Sb^(3+),40%Ho^(3+) and Cs_(2)NaScCl_(6):1%Sb^(3+) with blue light emission were employed for fabricating a light-emitting diode(LED) device with a340 nm UV chip,and its emission spectrum matches well the absorption spectra of chlorophyll A and chlorophyll B with the high resemblance of 70% and 75%,making it suitable for use as an artificial light source to control the growth process of plants in the field of plant lighting.
