High-Quantum-Yield [Eu(Phen)2(NO3)3] Phosphor Exhibiting Zero Thermal Quenching under Real Operating Conditions (30–150 °C)
Karla Scanda Raymundo Silva, Christian Javier Salas Juárez, Raúl Erick Guzmán Silva, Ismael Arturo Garduño Wilches, Hiram Isaac Beltrán Conde, José Guzmán Mendoza
TL;DR
This paper introduces a new europium-based phosphor that maintains strong red light emission without losing efficiency when heated up to 150°C.
Contribution
The first demonstration of zero thermal quenching in [Eu(Phen)2(NO3)3] under real operating temperatures.
Findings
The complex shows a high photoluminescence quantum yield of 96% and a long luminescence lifetime of 1.096 ms.
It exhibits deep-red emission with 99% color purity and stable CIE chromaticity coordinates (0.66, 0.33).
The phosphor shows no thermal quenching between 30–150 °C due to suppressed back-energy transfer.
Abstract
In this study, we present the first investigation of the temperature-dependent luminescence properties of the [Eu(Phen)2(NO3)3] complex across the 30–150 °C range. The coordination environment, thermal stability, and structural analysis of the complex were studied by Fourier-transform infrared spectroscopy, thermogravimetric analysis, and powder X-ray diffraction techniques. Photoluminescence studies under excitation at 350 and 396 nm revealed the characteristic Eu3+ emission arising from the 5D0 → 7F J (J = 1–4) transitions. Additionally, the complex exhibits a long luminescence lifetime (τ = 1.096 ± 0.001 ms) and a high photoluminescence quantum yield (Φ = 96%) with λexc = 350 nm. The photometric analysis confirms deep-red emission with 99% color purity and CIE 1931 chromaticity coordinates (x, y) = (0.66, 0.33). Notably, the [Eu(Phen)2(NO3)3] complex exhibits zero thermal…
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Taxonomy
TopicsLuminescence Properties of Advanced Materials · Thermal Expansion and Ionic Conductivity · Inorganic Chemistry and Materials