Kang Chengbin, Prodanov Maksym F, Song Jianxin, Mallem Kumar, Liao Zebing, Vashchenko Valerii V, Srivastava Abhishek K
State Key Laboratory of Advanced Displays and Optoelectronics Technologies, and Centre for Display Research, Electronics and Computer Engineering Department, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, 99077, China.
IAS Center for Quantum Technologies, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, 99077, China.
Small. 2024 Nov;20(45):e2311671. doi: 10.1002/smll.202311671. Epub 2024 Mar 27.
Energy-efficient white light-emitting diodes (LEDs) are in high demand across the society. Despite the significant advancements in the modern lighting industry based on solid-state electronics and inorganic phosphor, solid-state lighting (SSL) continues to pursue improved efficiency, saturated color performance, and longer lifetime. Here in this article, robust, narrow emission band nanorods (NRs) are disclosed with tailored wavelengths, aiming to enhance the color rendering index (CRI) and luminous efficacy (LE). The fabricated lighting device consists of NRs of configuration CdSe/ZnCdS/ZnS, which can independently tune CRI R1-R9 values and maximize the luminous efficacy. For general lighting, NRs with quantum yield (QY) up to 96% and 99% are developed, resulting in ultra-efficient LEDs reaching a record high luminous efficacy of 214 lm W (certified by the National Accreditation Service). Furthermore, NRs are deployed onto mid-power (0.3 W@ 50 mA) LEDs, showing significantly enhanced long-term stability (T = 400 h @ 50 mA). With these astonishing properties, the proposed NRs can pave the way for efficient lighting with desired optical spectrum.
高能效白光发光二极管（LED）在社会上有很高的需求。尽管基于固态电子学和无机磷光体的现代照明行业取得了重大进展，但固态照明（SSL）仍在不断追求更高的效率、饱和的色彩表现和更长的使用寿命。在本文中，我们披露了具有定制波长的坚固、窄发射带纳米棒（NRs），旨在提高显色指数（CRI）和发光效率（LE）。所制造的照明装置由配置为CdSe/ZnCdS/ZnS的纳米棒组成，其可以独立调节CRI的R1-R9值并使发光效率最大化。对于一般照明，我们开发了量子产率（QY）高达96%和99%的纳米棒，从而得到了创纪录的高发光效率为214 lm W的超高效LED（由国家认可服务机构认证）。此外，纳米棒被应用于中功率（0.3 W@50 mA）LED上，显示出显著增强的长期稳定性（T = 400 h @50 mA）。凭借这些惊人的特性，所提出的纳米棒可为具有所需光谱的高效照明铺平道路。
