Exploiting Desired Phosphor‐In‐Glass for All‐Inorganic Solid‐State White Illumination

Abstract

Solid‐state white lighting applications with high brightness, low power consumption and long operating life have gradually dominated the modern industrial illumination market. For applications in white light‐emitting diodes (WLEDs) and white‐lighting laser diodes (WLDs), Phosphor‐in‐Glass (PiG), owing to its facile process, high efficiency and excellent chromaticity tunability, stands out as an optimal choice among various types of color converters. Currently, research in yellow‐emitting Y3Al5O12:Ce3+ (YAG: Ce) phosphors combined with different glass system has reached a mature stage and the poor illumination is a major bottleneck. Moreover, to realize high‐quality white lighting, exploiting full‐color PiGs is of great importance for its commercialization. Herein, the multicolour PiGs their successfully obtained by deliberately matching different color‐emitting phosphors with the glass matrix. Glass composition selection rules for specific phosphors their proposed based on investigations of glass protection mechanism and the corrosion reaction between phosphors and glass matrix. In addition, an astonishing YAG: Ce PiG phenomenon (zero thermal quenching) is founded and discussed. As for practical applications, high‐quality 5‐W chip‐on‐board (COB) WLEDs their constructed by utilizing simple matches of colorful PiGs. Assembled WLDs modules also rendered a high‐efficiency and stable lighting source. These results dramatically inspire the development of high‐quality solid‐state white lighting applications.

Tricolor Pattern Design: Ultrahigh Thermal Conductivity Phosphor-in-Glass Film for Laser Illumination

“…At 523 K, it gives 5.5 times of PL intensity compared to initial intensity. This phenomenon is because when the temperature gradually increases, the phosphor and inherent defects in the glass structure act as electron-trapping centers to provide extra energy to activators (Ce 3+ ) for luminescence enhancement. ,, Thermoluminescence (TL) spectrum (Figure e) demonstrates three intense TL peaks at 349, 437, and 573 K, respectively. The relevant trap depths are estimated to be 0.698, 0.874, and 1.146 eV, respectively (according to the equation E trap = T /500 (eV), where the temperature T is in units of K). ,− During continuous heating and 450 nm excitation, defects produce abundant energy for the conduction band (to counteract thermal ionization) and the 5d-band (to enhance yellow-light emission by simultaneously recombining luminescence centers and electrons). ,− As the temperature increases, the electrons in deeper traps are released to supply energy.…”

“…This phenomenon is because when the temperature gradually increases, the phosphor and inherent defects in the glass structure act as electron-trapping centers to provide extra energy to activators (Ce 3+ ) for luminescence enhancement. 18,35,36 Thermoluminescence (TL) spectrum (Figure 2e) demonstrates three intense TL peaks at 349, 437, and 573 K, respectively. The relevant trap depths are estimated to be 0.698, 0.874, and 1.146 eV, respectively (according to the equation E trap = T/500 (eV), where the temperature T is in units of K).…”

Highly efficient large-area ultrathin phosphor-glass composites fabricated by tape-casting for super-bright LED lights

“…However, such lighting devices usually suffer severe performance degradation as the mixture of phosphor and organic resin was heated up to a certain high-temperature by the self-heating of LED chip [8][9][10] . In recent years, traditional doped singlephase transparent ceramics and bulk crystals have emerged as e cient all-inorganic color converters, offering the potential to circumvent the need for organic encapsulation [11][12][13][14] . However, their costly preparation and limited variety have hindered scalable manufacture and widespread application.…”

Red‐Emitting Cordierite Ceramic Enabling General Healthy Warm White Laser Lighting

“…[6] As a result, significant efforts have been dedicated to developing new color converters with high luminescence efficiency and laser tolerance, including single-crystal, phosphor ceramics, and phosphor-in-glass (PiG) materials. [7] Typically, the output of white light in LDs is realized by pumping lasers into a bulk phosphor converter. [3] Accordingly, various color converters have been synthesized and successfully implemented in laser applications, but most reports are limited to Ce 3+ -doped garnet PiG/multiphase ceramics with yellow emission.…”

“…[ 6 ] As a result, significant efforts have been dedicated to developing new color converters with high luminescence efficiency and laser tolerance, including single‐crystal, phosphor ceramics, and phosphor‐in‐glass (PiG) materials. [ 7 ]…”