Sunlight-Activated Orange Persistent Luminescence from Bi-Doped SrBaZn₂Ga₂O₇ for Warm-Color Optical Applications

Abstract

A warm persistent luminescence (PersL) material SrBaZn2Ga2O7:Bi3+ was prepared using the conventional high-temperature solid-phase reaction method. We first investigated the PersL properties of SrBaZn2Ga2O7:Bi3+ in detail via PersL spectra, PersL excitation spectrum, PersL decay curves, and thermoluminescence (TL) spectra. The highlight of this study is that in addition to the 254 nm light source, the low-energy light source of 365 nm and sunlight can effectively excite electrons and charge traps, resulting in preferable orange PersL performance. The PersL decay time of the representative sample can last for 960 s after excitation by a 365 nm light source and 900 s after excitation by simulated sunlight. Meanwhile, the PersL color can be regulated by changing the excitation wavelength. In order to explain the infrequent PersL phenomena after different light source excitations, we recorded a series of TL spectra as a function of different light sources, different charging times, and different decay times to reveal the distribution of traps in the material and the influence of trap distribution on trapping and detrapping processes. This novel sunlight-activated orange PersL material is expected to promote the development of sunlight-activated PersL materials and expand potential applications in solar energy utilization and anticounterfeit marking.

Sunlight-activated Eu3+-doped CaNaSb2O6F yellow-orange long-persistence luminescence material

“…Specifically, the decay curve of the sample irradiated by natural light shows a comparable decay tendency in various weather environments, suggesting that the sample can be activated by solar light quickly, effectively and repeatedly. 13,17,18 These results indicate that the CNSOF:Eu 3+ samples are highly responsive to both direct solar light (sunny day) and diffuse solar radiation (cloudy or rainy day). In addition, the PersL decay curves of the CNSOF:Eu 3+ phosphors were exposed to direct solar light for 10 min at various times throughout the day (for instance, at 6:00 am, 9:00 am, 12:00 noon, 3:00 pm, 6:00 pm and a moonlight night) on a bright sunny day, as exhibited in Fig.…”

“…Even the most famous red PersL phosphor, Y 2 O 2 S:Eu 3+ ,Ti 4+ ,Mg 2+ , still cannot fully meet the needs of practical application due to its high cost and low sensitivity to room light. [13][14][15][16][17][18][19] Thus, it is an ongoing challenge to develop efficient sunlight-activated warm-color persistent luminescence phosphors to fulfill the high demands for a variety of practical applications.…”

Unveiling the Potential of Sunlight‐Driven Multifunctional Blue Long Persistent Luminescent Materials via Cutting‐Edge Trap Modulation Strategies

“…Chen method utilizes general‐order kinetics to process TL emission curves and closely examines the shape of TL peaks. [ 48 ] The trap depth can be estimated using Equations () [ 39 ] : $$$$\begin{equation}E = \frac{{{c}_\tau kT_m^2}}{\tau } - {b}_\tau \left( {2\kappa {T}_m} \right)\end{equation}$$$$ $$$$\begin{equation}{c}_\tau = 1.51 + 3.0\left( {\mu - 0.42} \right)\end{equation}$$$$ $$$$\begin{equation}{b}_\tau = 1.58 = 4.2\left( {\mu - 0.42} \right)\end{equation}$$$$ $$$$\begin{equation}\mu = \frac{{{T}_2 - {T}_m}}{{{T}_m - {T}_1}}\end{equation}$$$$…”

“…Chen method utilizes general-order kinetics to process TL emission curves and closely examines the shape of TL peaks. [48] The trap depth can be estimated using Equations (9-12) [39] :…”

Design of Cr–Ba-doped γ-Ga2O3 persistent luminescence nanoparticles for ratiometric temperature sensing and encryption information transfer

“…7 The hosts, such as aluminates, silicates, galliates, sulfides, fluorides, and germanates, 8 are the matrices to integrate the emission center and trap. 9 After the emission centers, including lanthanide, transition, and some main group elemental metal ions, 10 are introduced, the optical properties of the host were obviously improved for PLNPs, especially the near-infrared (NIR) emission. 11 The impurity ions, such as the traps, can modulate the afterglow time and enhance the emission intensity.…”