CAJ | 학술논문

采用逐步热注射法合成了用于白光LED的CuInS2/ZnS( CIS/ZnS)核壳结构量子点. 通过调整Cu/In的比率,在CuInS2 ( CIS)量子点的基础上,合成了发射波长在570~650 nm之间可调的CIS/ZnS量子点. 与CIS量子点的低量子产率相比,具有核壳结构的CIS/ZnS量子点的量子产率达到了78%. 通过在黄光荧光粉YAG:Ce3+表面旋涂CIS/ZnS量子点的方式制备了暖白光LED器件. 在工作电流为10 mA时,暖白光LED的发光效率达到了244. 58 lm/W. 由于CIS/ZnS量子点的加入,所制备的白光LED器件的显色指数达到86. 7且发光颜色向暖色调发生了转移,相应的色坐标为(0. 340 6,0. 369 0).
채용축보열주사법합성료용우백광LED적CuInS2/ZnS( CIS/ZnS)핵각결구양자점. 통과조정Cu/In적비솔,재CuInS2 ( CIS)양자점적기출상,합성료발사파장재570~650 nm지간가조적CIS/ZnS양자점. 여CIS양자점적저양자산솔상비,구유핵각결구적CIS/ZnS양자점적양자산솔체도료78%. 통과재황광형광분YAG:Ce3+표면선도CIS/ZnS양자점적방식제비료난백광LED기건. 재공작전류위10 mA시,난백광LED적발광효솔체도료244. 58 lm/W. 유우CIS/ZnS양자점적가입,소제비적백광LED기건적현색지수체도86. 7차발광안색향난색조발생료전이,상응적색좌표위(0. 340 6,0. 369 0).
A stepwise hot-injection method was proposed to synthesize CuInS2/ZnS ( CIS/ZnS ) core/shell quantum dots. Based on CIS quantum dots, the emission bands of the prepared CIS/ZnS quantum dots can be tuned from 570 to 650 nm by varying Cu/In ratio. Compared to the low quan-tum yields of CIS quantum dots, the quantum yields of CIS/ZnS core/shell quantum dots can reach 78%. The white LEDs with warm tone were successfully obtained via spin-coating CIS/ZnS quantum dots on the yellow phosphor YAG:Ce3+. The experimental results indicate that the white LEDs pos-sess high luminous efficiency of 244. 58 lm/W under 10 mA current density. As a result of joining CIS/ZnS quantum dots, the prepared white LEDs display higher color rendering index ( CRI ) of about 82. 7 and warm white light with a correlated CIE parameters of (0. 340 6, 0. 369 0).