Multi-site occupancies and luminescence properties of cyan-emitting Ca9–NaGd2/3(PO4)7:Eu2+ phosphors for white light-emitting diodes

High quality lead-free perovskites toward white light emitting diodes and X-ray imaging

“…The thermal and water stability of the Cs 2 HfCl 6 : 3% Te 4+ crystals are of significant importance for practical LED applications. 56 As shown in Fig. S12a (ESI†), the decomposition temperature of Cs 2 HfCl 6 : 3% Te 4+ reaches as high as 400 °C.…”

A novel bright cyan emitting phosphor of Eu2+activated Ba6BO3Cl9with robust thermal stability for full-spectrum WLED applications

“…13,14 In recent years, an alternative preparation method has been proposed to achieve WLEDs by coating tricolor RGB (red, green, and blue) phosphors on ultraviolet (UV) or nearultraviolet (n-UV) emitting LED chips, which can achieve a higher R a and lower CCT compared with blue light excited LEDs. 6,[15][16][17] However, tricolor phosphor converted systems still cannot fully meet the needs of people for healthy lighting. The reasons why common LEDs are insufficient for healthy lighting can be attributed to the following: First, the blue light content of ordinary LEDs is too high, far above the solar spectrum.…”

“…3,9,18 Second, common LEDs have a gap near 480 nm between blue light and green light in the spectrum, which leads to a poor spectral continuity. 11,15,16 Long-term exposure to this kind of light can create inertia in our visual perception, which somewhat affects our judgment of color. 8 Therefore, it is meaningful to obtain a novel WLED spectrum for visual health and human cognitive habit of color, which can weaken the blue light component and fill the missing light component near the 480 nm cyan-gap to make the spectrum smoother and of better continuity.…”

Multiwavelength Excitation in Ho3+-Doped All-Inorganic Double Perovskites Achieved by Codoping Mn2+ for Warm-White LEDs and Plant Growth

“…Generally, commercial WLEDs are assembled using yellow phosphors combined with blue-LED chips. , However, these pc-WLEDs pose a potential hazard to ocular health owing to excess blue light. Furthermore, the absence of a red light component in the yellow phosphor will lead to the low color rendering index (CRI) and high correlated color temperature (CCT).…”