Journal of Inorganic Materials ›› 2023, Vol. 38 ›› Issue (8): 901-909.DOI: 10.15541/jim20220733
• RESEARCH ARTICLE • Previous Articles Next Articles
ZENG Qiqi(), WU Yanzheng, CHENG Huangyu, SHAO kang, HU Tianyu, PAN Zaifa(
)
Received:
2022-12-05
Revised:
2023-01-09
Published:
2023-08-20
Online:
2023-02-21
Contact:
PAN Zaifa, associate professor. E-mail: panzaifa@zjut.edu.cnAbout author:
ZENG Qiqi (1999-), female, Master candidate. E-mail: zengqiqi0513@163.com
Supported by:
CLC Number:
ZENG Qiqi, WU Yanzheng, CHENG Huangyu, SHAO kang, HU Tianyu, PAN Zaifa. Calcium Doped Self-activated Zinc Germanate Long Afterglow Materials: Multicolor Afterglow and Application in Dynamic Anti-counterfeiting[J]. Journal of Inorganic Materials, 2023, 38(8): 901-909.
Fig. 3 Diffuse reflection spectra and band gap widths of ZCGO series samples (a) UV-Vis diffuse reflectance spectra of ZCGO samples; (b) (F(R)×E)1/2-E diagram of ZCGO series sample; Colorful figures are available on website (Band gap energy is estimated by intercept of the tangential)
Fig. 4 Excitation spectra under different monitoring wavelengths and photos in different light sources of ZCGO series samples (a) 450 nm; (b) 526 nm; (c) 600 nm; (d) Photographs of ZCGO samples excited by daylight, 254 and 365 nm; Colorful figures are available on website
Fig. 5 Emission spectra of ZCGO series samples at different excitation wavelengths (a, b) Steady-state emission spectra of ZCGO samples excited at (a) 267 nm and (b) 376 nm; (c, d) Time-resolved emission spectra of ZCGO samples excited at (c) 267 nm, (d) 376 nm; Colorful figures are available on website
Fig. 6 Afterglow decay curves of ZCGO series samples and ZCGO-5 samples under different monitoring wavelengths (a, b) Afterglow decay curves of ZCGO samples excited at 267 nm and monitored at (a) 450 nm and (b) 526 nm; (c) Afterglow decay curves of ZCGO samples excited at 376 nm and monitored at 600 nm; (d) Afterglow decay curves of ZCGO-5 samples monitored at 450 nm, 526 nm and 600 nm; Colorful figures are available on website
Sample | τ1/s | A1 | τ2/s | A2 | τavg/s |
---|---|---|---|---|---|
ZCGO-1 | 6.82 | 0.61 | 81.44 | 0.58 | 75.88 |
ZCGO-2 | 6.52 | 0.91 | 90.57 | 0.97 | 85.26 |
ZCGO-3 | 7.88 | 0.67 | 87.94 | 0.85 | 82.68 |
ZCGO-4 | 6.78 | 0.85 | 88.58 | 0.98 | 83.47 |
ZCGO-5 | 9.17 | 0.65 | 88.49 | 0.83 | 82.53 |
ZGO | 4.92 | 0.65 | 66.13 | 0.40 | 63.47 |
Table 1 Parameters for double-exponentially fitting afterglow decay of ZCGO-5 and ZGO samples
Sample | τ1/s | A1 | τ2/s | A2 | τavg/s |
---|---|---|---|---|---|
ZCGO-1 | 6.82 | 0.61 | 81.44 | 0.58 | 75.88 |
ZCGO-2 | 6.52 | 0.91 | 90.57 | 0.97 | 85.26 |
ZCGO-3 | 7.88 | 0.67 | 87.94 | 0.85 | 82.68 |
ZCGO-4 | 6.78 | 0.85 | 88.58 | 0.98 | 83.47 |
ZCGO-5 | 9.17 | 0.65 | 88.49 | 0.83 | 82.53 |
ZGO | 4.92 | 0.65 | 66.13 | 0.40 | 63.47 |
Fig. 7 TL curves of ZCGO series samples under different monitoring wavelengths and trap depth histogram of samples (a, b) TL curves of ZCGO series samples monitored at (a) 526 and (b) 600 nm; (c) TL curves of ZCGO-1 and ZGO samples monitored at 766 nm; (d) Trap depths corresponding to TL peaks of ZCGO series samples; Colorful figures are available on website
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