Thermally Stable, Dye‐Bridged Nanohybrid‐Based White Light‐Emitting Diodes

Abstract

Thermally stable red and green light-emitting nanohybrids are introduced as an organic luminescent converter with broad color tunability and a high color rendering index for white light-emitting diodes (LEDs). Nanohybrid-based white LEDs are thermally stable and the color coordination is not changed by heat exposure.

Optical Properties of Hybrid Organic‐Inorganic Materials and their Applications

“…• C for 1200 h. [17] The use of organically doped layered phyllosilicate clays was introduced in the late 90's. [64,65] Although not fabricated as WLEDs, white light-emitting soft hybrids was reported based on the supramolecular co-assembly of organoclays and ionic chromophores.…”

“…Poly(2-hydroxyethyl methacylate-silica hybrids doped with organoboron dyes emitting in the blue, green and red spectral regions [16] and dye-bridged epoxy functional oligosiloxanes emitting in the green and red spectral regions with absolute emission quantum yields of 0.85 and 0.41, respectively, [17] were used to produce efficient multi-color light-emitting hybrids. In this latter example, WLEDs were produced using a commercial blue LED as excitation source and by controlling the dyes concentration and the ratio between the red and green emitting species (Figure 3).…”

“…The first examples of the use of hybrid materials in lighting (more specifically in solid-state lighting, SSL) appeared in 2001 with layered crystalline organic-inorganic perovskites. [8] Although the interest on these hybrid perovskites as single-phase white light emitters continue, [9,10] the wide range of materials with potential application in SSL would include dye-bridged, [11][12][13][14][15][16][17] dyedoped [18] and quantum dots-doped [19] siloxane-based organicinorganic hybrids, and metal organic frameworks. [20] Despite the interest of organic-inorganic hybrid perovskites in lighting, the most exciting application of these materials is in solar cells.…”

“…Finally, the polymer-MOF hybrid is assembled on a near-UV GaN chip to fabricate near-UV WLED ( Figure 6) operating at 350 mA with a CCT of 3742 K and a CRI of 87.34. [76] Monochromatic LEDs were also fabricated based on dye-bridged hybrids [14][15][16][17] and Ln 3+ complexes.…”

Tunable and white light emitting AlPO4 mesoporous glass by design of inorganic/organic luminescent species

“…C The pursuit of proper luminescent species in single host with suitable color mixing to achieve tunable and white light emission has attracted great interest in developing single-phase full-color phosphors. [1][2][3][4] As there are various types of luminescent species available today, yet many researchers are just focusing on single type luminescent species especially inorganic ones such as rare earth or quantum dots. [5][6][7][8] The high temperature of the conventional phosphor fabrication impedes the utilization of organic luminescent species.…”