Fast and intense green emission of Tb3+ in borosilicate glass modified by Cu+

Abstract

We present photoluminescence properties of Tb3+ doped borosilicate glasses modified by Cu+. Around 5-time enhanced emission at 541 nm due to the superposed emission of Tb3+ and Cu+ is observed under the deep UV excitation. Excitation spectra demonstrate a greatly increased absorption of Tb3+ ions in the deep UV region towards the Cu+ excitation band, while the shortened Cu+ emission lifetime of glasses in association with presence of Tb3+ ions implies an energy transfer process from Cu+ to Tb3+ ions. Meanwhile, the Tb3+ emission lifetime is significantly shortened from the conventional millisecond level (~4 ms) to the microsecond regime up to around 90 μs. This most likely starts with the role of Cu+ as a co-activator by initiating the d-f orbital hybridization process via an interaction with Tb3+, thus relaxing the spin forbidden transition of Tb3+ ions to the partially allowed one. Moreover, combination of emissions from Cu+ and Tb3+ ions generates a composite green emission with adjustable CIE (Commission Internationale de L’Eclairage) chromaticity coordinates achievable by co-doping Cu+/Tb3+ in the different ratio and/or altering the excitation wavelength from deep UV to near UV region.

Green- and Blue-Emitting Tb3+-Activated Linde Type A Zeolite-Derived Boro-Aluminosilicate Glass for Deep UV Detection/Imaging

“…The values obtained for τm from this method were 18, 14, and 17 μs for samples #1, #2, and #3, respectively. A decay time on the order of μs is potentially suitable for applications concerning static imaging, UV detection [27], and plasma display panels [28][29][30]. Importantly, these decay times are substantially shorter than those typically obtained for Tb 3+ -doped glass materials, which are on the order of ms (Table 2).…”

“…In fact, examples of Tb 3+ -doped glasses showing 5 D 3 -originated blue emission with intensities comparable to those of the green emission are limited to glasses with low contents of Tb 3+ (typically no more than 1 mol%) [14,15,[17][18][19]. The green luminescence decay time of Tb 3+ -doped glasses is typically on the order of ms [16,[20][21][22][23][24][25][26], which normally does not satisfy the fast response time required for some applications, e.g., scintillation detectors [27] and plasma display panels [28,29]. In fact, examples of Tb 3+ -doped glasses with decay times on the order of µs are rare [29].…”

“…The green luminescence decay time of Tb 3+ -doped glasses is typically on the order of ms [16,[20][21][22][23][24][25][26], which normally does not satisfy the fast response time required for some applications, e.g., scintillation detectors [27] and plasma display panels [28,29]. In fact, examples of Tb 3+ -doped glasses with decay times on the order of µs are rare [29].…”

Stimuli-free Zn/soda-lime glass/CuO-based MIS device for sensing human skin moisture

“…It is observed that the T g of borosilicate is in the range of 440-560 1C and that of quartz is B1200 1C, which are, respectively, lower and higher than the annealing temperature (600 1C). [55][56][57][58][59] From the photograph shown in Fig. S8 (sideview) (ESI †), it is noted that the SLG and borosilicate (Fig.…”

Non-invasive Photodynamic Therapy in Brain Cancer by Use of Tb3+-Doped LaF3 Nanoparticles in Combination with Photosensitizer Through X-ray Irradiation: A Proof-of-Concept Study

“…This approach is based on the concept that scintillating nanoparticles, such as Tb 3+ -doped LaF 3 crystal (LaF 3 :Tb), can locally convert X-ray into light and the emitted luminescences are able to activate the photosensitizers on the mechanism of fluorescence resonance energy transfer (FRET), further resulting in activating photosensitizer to induce 1 O 2 for cancer therapy [8]. The conversion of X-ray into fluorescence emission by LaF 3 :Tb is based on the mechanism that Tb 3+ ions exhibit the transitions resulting mainly from the excited level, 5 D 4 , down to the lower levels, 7 F j ( j  = 6–3), and can be accompanied by the photoluminescence properties as Tb 3+ doped in low vibrational energy and high resistivity properties of LaF 3 host material [9, 10]. LaF 3 :Tb has demonstrated luminescence at 487, 542, 582, and 620 nm under the excitation of X-ray [10].…”