Recent progress on discovery of novel phosphors for solid state lighting

Discovery of new broadband yellow‐emitting nitridoalumosilicate phosphor and its pc‐WLED application

“…The representative sample's HRTEM image was also investigated. The interplanar crystal spacing along two orthogonal directions are approximately 5.09 Å and 2.83 Å, which corresponds to the crystallographic plane of (110) and (022), respectively, and the zone axis is 2–22 …”

“…White‐light‐emitting diodes (WLEDs), as the mainstream products in the lighting market, have gradually replaced ordinary lighting with its eye‐catching advantages 1–5 . Yellow phosphor (YAG:Ce 3+ ) combined with blue LED chip is currently the mainstream solution for WLEDs due to the simple process and low cost 6–7 .…”

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White-light-emitting diodes (WLEDs), as the mainstream products in the lighting market, have gradually replaced ordinary lighting with its eye-catching advantages. [1][2][3][4][5] Yellow phosphor (YAG:Ce 3+ ) combined with blue LED chip is currently the mainstream solution for WLEDs due to the simple process and low cost. [6][7] However, due to the lack of red components, its color rendering is insufficient (~70), and the color temperature is colder (4500-6500 K), making it impossible to apply in certain fields (e.g., bedrooms, hospitals and coffee shops).

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Chasing Down the Eu2+ Ions: The Delicate Structure−Property Relationships in the Ultra‐Narrow Band Phosphor K1.6Na2.1Li0.3[Li3SiO4]4:Eu2+

“…[ 1–11 ] Narrow band emitters have become particularly important in that area as they allow to achieve high color purity and maximum accessible color gamut, which are mandatory for a high luminous efficacy based on a reduction of losses in areas of low eye sensitivity. [ 7,12–19 ] Especially Eu 2+ has gained considerable attraction as an emitter in inorganic phosphors. This is related to its electric dipole‐allowed 4f 7 ↔ 4f 6 5d 1 transition typically located in the visible range that allows to efficiently excite Eu 2+ ions without significant droop at high incident flux.…”

Full color white light, temperature self‐monitor, and thermochromatic effect of Cu+ and Tm3+ codoped germanate glasses

“…As one of the most promising solid state lighting (SSL) sources, white‐light emitting diodes (w‐LEDs) were greatly popularized during most recent decade, and began to replace gradually conventional incandescent and fluorescent lamps in the marketplace due to their serving longevity, environmental friendliness, high efficiency, excellent sturdiness and so on 1‐5 . At present, two mainstream methods to fabricate w‐LEDs are wieldy adopted: one is the combination of yellow‐emitting YAG:Ce 3+ phosphor with InGaN blue‐emitting chip; another is coating the red, green, and blue (tricolor phosphors) emitting phosphors on near‐ultraviolet (NUV) chip 6‐8 .…”