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1.中国科学院 理化技术研究所 仿生材料与界面科学重点实验室, 北京 100190
2.中国科学技术大学 苏州高等研究院, 江苏 苏州 215123
3.中国科学院大学 未来技术学院, 北京 100049
张晔,男,博士研究生,2023年于吉林大学获得学士学位,主要从事光电材料图案化与QDs材料方面的研究。E-mail:zhangye231@mails.ucas.ac.cn
李辉,男,博士,助理研究员,2024年于河南大学获得博士学位,主要从事QDs发光显示材料与图案化器件方面的研究。E-mail:lihui-t22031@ustc.edu.cn
郭宁,女,博士研究生,2022年于吉林大学获得学士学位,主要从事量子点材料合成与图案化器件方面的研究。E-mail:guoning22@mails.ucas.ac.cn
收稿:2025-09-11,
修回:2025-11-02,
纸质出版:2026-01-05
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张晔, 李辉, 郭宁, 等. CdZnSe基量子点用于高性能纯蓝光量子点发光二极管[J]. 液晶与显示, 2026,41(1):74-83.
ZHANG Ye, LI Hui, GUO Ning, et al. CdZnSe-based quantum dots for high-performance pure-blue quantum dot light-emitting diodes[J]. Chinese Journal of Liquid Crystals and Displays, 2026, 41(1): 74-83.
张晔, 李辉, 郭宁, 等. CdZnSe基量子点用于高性能纯蓝光量子点发光二极管[J]. 液晶与显示, 2026,41(1):74-83. DOI: 10.37188/CJLCD.2025-0187. CSTR: 32172.14.CJLCD.2025-0187.
ZHANG Ye, LI Hui, GUO Ning, et al. CdZnSe-based quantum dots for high-performance pure-blue quantum dot light-emitting diodes[J]. Chinese Journal of Liquid Crystals and Displays, 2026, 41(1): 74-83. DOI: 10.37188/CJLCD.2025-0187. CSTR: 32172.14.CJLCD.2025-0187.
量子点发光二极管(Quantum Dot Light Emitting Diodes,QLED)因其窄发射光谱、广色域覆盖、高亮度及低功耗等优势,在高分辨率显示和增强现实等新兴领域展现出广阔应用前景。但蓝色器件的发光效率和稳定性显著落后于红色和绿色器件,这限制了全彩显示的发展。本研究提出了一种基于ZnSe主体并引入Cd离子调控发射的合成策略,通过在高温条件下快速注入Cd
2+
实现离子交换,成功制备出发射峰位为469 nm、光致发光量子产率(Photoluminescence Quantum Yield, PLQY)为79%的CdZnSe核量子点(QDs),并在核QDs外进行ZnSe/ZnSeS/ZnS多层壳层外延生长,有效钝化表面缺陷、增强结构稳定性并显著降低非辐射复合速率。结果显示多层壳层后的QDs发射峰稳定在463 nm,PLQY进一步提升至92%,呈现纯蓝色发射;以此构建的QLED器件峰值外量子效率达到18.5%,最高亮度达到6.34×10
4
cd/m
2
。该策略通过离子交换与多层壳层钝化的协同作用,实现了纯蓝区QDs的高PLQY、稳定发射的高性能QLED器件,为深蓝区QDs的高效制备提供了有效方法。
Quantum dot light-emitting diodes(QLEDs) have attracted extensive attention in high-resolution displays and emerging fields such as augmented reality due to their narrow emission spectra, wide color gamut, high brightness, and low power consumption. However, the electroluminescent efficiency and stability of blue devices remain significantly inferior to those of red and green devices, and the lack of high-performance pure blue quan
tum dots(QDs) has limited the development of full-color displays. In this study, we report a synthesis strategy based on a ZnSe core with Cd ion-mediated emission tuning. CdZnSe core QDs were successfully prepared by rapid Cd
2+
injection under high-temperature conditions to induce ion exchange, achieving an emission peak at 469 nm with a photoluminescence quantum yield(PLQY) of 79%. Subsequently, a multilayer shell structure of ZnSe/ZnSeS/ZnS was epitaxially grown on the core QDs, effectively passivating surface defects, enhancing structural stability, and significantly suppressing non-radiative recombination. The resulting multilayer-capped QDs exhibited a stable emission peak at 463 nm with a PLQY further increased to 92%, showing pure blue emission. QLED devices fabricated using these QDs demonstrated excellent electroluminescent performance, with a peak external quantum efficiency(EQE) of 18.5% and a maximum brightness of 6.34×10
4
cd/m
2
. In summary, this strategy, combining ion exchange with multilayer shell passivation, enables the fabrication of high-PLQY, stable pure blue QDs and high-performance QLED devices.
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