| 基于CuInS2/ZnS核壳结构量子点的高光效暖白光LED |
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| 引用本文： | 艾哲,倪帅帅,张亚非.基于CuInS2/ZnS核壳结构量子点的高光效暖白光LED[J].发光学报,2015,36(11):1282-1288. |
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| 作者姓名： | 艾哲 倪帅帅 张亚非 |
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| 作者单位： | 上海交通大学电子信息与电气工程学院 薄膜与微细加工技术教育部重点实验室, 上海 200240 |
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| 基金项目： | 国家自然科学基金(YYWX_E12102791-201304)资助项目 |
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| 摘 要： | 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).
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| 关 键 词： | CuInS2/ZnS 核壳结构量子点 可调 暖白光 |
| 收稿时间： | 2015-08-13 |
Warm White LED with High Luminous Efficiency Based on CuInS2/ZnS Core/Shell Quantum Dots |
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| AI Zhe,NI Shuai-shuai,ZHANG Ya-fei.Warm White LED with High Luminous Efficiency Based on CuInS2/ZnS Core/Shell Quantum Dots[J].Chinese Journal of Luminescence,2015,36(11):1282-1288. |
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| Authors: | AI Zhe NI Shuai-shuai ZHANG Ya-fei |
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| Institution: | Key Laboratory for Thin Film and Microfabrication Technology, Ministry of Education, School of Electronic Information and Electrical Engineering, Shanghai Jiaotong University, Shanghai 200240, China |
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| Abstract: | 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 quantum 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 possess 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). |
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| Keywords: | CuInS2/ZnS core/shell quantum dots tunable warm white light |
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