Robust, Narrow ‐Band Nanorods LEDs with Luminous Efficacy > 200  lm/W: Next‐Generation of Efficient Solid‐State Lighting

This article reveals narrow emission band nanorods (NRs) with tailored wavelengths to enhance the color rendering index (CRI) and luminous efficacy (LE). For general lighting, CdSe/ZnxCd1-xS/ZnS NRs with quantum yield up to 96% and 99% in ultra-efficient LEDs maximize the efficacy, reaching a record efficacy of 214 lm  W−1 (certified by the National Accreditation Service). The mid-power (0.3 W@ 50 mA) NR-LEDs show significantly enhanced long-term stability (T95 = 400 h @ 50 mA). AbstractEnergy-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/ZnxCd1-xS/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−1 (certified by the National Accreditation Service). Furthermore, NRs are deployed onto mid-power (0.3 W@ 50  mA) LEDs, showing significantly e...

Source: Small - March 28, 2024 Category: Nanotechnology Authors: Chengbin Kang, Maksym F. Prodanov, Jianxin Song, Kumar Mallem, Zebing Liao, Valerii V. Vashchenko, Abhishek K. Srivastava Tags: Research Article Source Type: research