Gu Shuangqing, Guo Haijie, Shi Qiufeng, Wang Lei, Cui Cai'e, Cui Yanxia, Huang Ping
College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, P.R. China.
Key Laboratory of Advanced Transducers and Intelligent Control Systems, Ministry of Education and Shanxi Province, College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, P.R. China.
Inorg Chem. 2021 Dec 20;60(24):19233-19241. doi: 10.1021/acs.inorgchem.1c03024. Epub 2021 Nov 28.
A warm persistent luminescence (PersL) material SrBaZnGaO:Bi was prepared using the conventional high-temperature solid-phase reaction method. We first investigated the PersL properties of SrBaZnGaO:Bi 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.
采用传统高温固相反应法制备了一种热致持续发光（PersL）材料SrBaZnGaO:Bi。我们首先通过PersL光谱、PersL激发光谱、PersL衰减曲线和热释光（TL）光谱详细研究了SrBaZnGaO:Bi的PersL特性。本研究的亮点在于，除了254 nm光源外，365 nm的低能量光源和阳光能够有效地激发电子和电荷陷阱，从而产生较好的橙色PersL性能。代表性样品在365 nm光源激发后的PersL衰减时间可长达960 s，在模拟阳光激发后为900 s。同时，PersL颜色可通过改变激发波长来调节。为了解释不同光源激发后不常见的PersL现象，我们记录了一系列作为不同光源、不同充电时间和不同衰减时间函数的TL光谱，以揭示材料中陷阱的分布以及陷阱分布对俘获和去俘获过程的影响。这种新型的阳光激活橙色PersL材料有望推动阳光激活PersL材料的发展，并拓展其在太阳能利用和防伪标记方面的潜在应用。
