Abstract:The use of Yb codoping for enhancing the near-infrared (NIR) emission in Bi, Yb codoped PbF crystal was investigated for the first time, to the best of our knowledge. The NIR and visible fluorescence emission properties of the as-grown crystals were investigated in detail. It was found that the Yb ion can act as an effective charge compensated ion to bring about the conversion from Bi to Bi, enhancing the NIR fluorescence emission in Bi:PbF crystal. Moreover, the NIR fluorescence emission peaking at around 109… Show more
“…In 2018, Zhang and co-workers synthesized Yb/Bi co-doped PbF 2 single crystal using Bridgman method ( Zhang et al., 2018a , 2018b ). Figure 3 shows the NIR emission spectra of prepared samples.…”
Section: Known Bi-doped Nir Luminescent Crystalsmentioning
confidence: 99%
“… Figure 3 NIR Emission of Yb/Bi:PbF 2 , Bi:PbF 2 , and Yb:PbF 2 Crystals under 600 nm Excitation. Reproduced with permission ( Zhang et al., 2018a ). Copyright 2018, Optical Society of America.…”
Section: Known Bi-doped Nir Luminescent Crystalsmentioning
confidence: 99%
“…However, the authors found efficient NIR luminescence if co-doped with Yb 3+ ions, in which energy transfer from Yb to Bi should explain this phenomenon ( Xiong et al., 2012 ). Another way to enhance NIR emission has also been reported in Bi/Ta co-doped Gd 0.1 Y 0.9 AlO 3 single crystal, because the introduction of Ta 5+ can effectively lead to the change of valence states from Bi 3+ to Bi + based on the charge compensation mechanism ( Zhang et al., 2018a , 2018b ).…”
Section: Known Bi-doped Nir Luminescent Crystalsmentioning
confidence: 99%
“…Afterward, in 2012, Peng et al proposed that Bi 0 could also act as the NIR center in chloride of Ba 2 B 5 O 9 Cl (Zheng et al, 2012). Although they Reproduced with permission (Zhang et al, 2018a (Peng et al, 2010), the introduction of Bi 0 into Bi-doped NIR luminescent chlorides should be an important leap. First, samples of Ba 2(1-x) B 5 O 9 Cl:2x% sintered under air showed no NIR emission.…”
Summary
Bismuth (Bi)-doped materials are capable of exhibiting broadband near-infrared (NIR) luminescence in 1,000–1,700 nm; driven by the potential use in lasers and broadband optical amplifiers for modern fiber communication systems, Bi-activated NIR luminescencent glasses and related devices have attracted much attention. Compared with glass systems, Bi-doped crystals as gain media usually have more regular crystal structures to produce stronger NIR signals, and developing such materials is highly desirable. Regarding the recent advances in Bi-doped NIR crystals, here, for the first time, we summarized such crystals listed as two main categories of halogen and oxide compounds. Then, by comparing the substitution site, coordination environment, emission and excitation luminescence peaks, emitting center species, and decay times of these known Bibased NIR crystals, discussion on how to design Bi-doped NIR crystals is included. Finally, the key challenges and perspectives of Bi-doped NIR crystals are also presented. It is hoped that this review could offer inspiration for the further development of Bi-doped NIR luminescent crystals and exploit its potential applications.
“…In 2018, Zhang and co-workers synthesized Yb/Bi co-doped PbF 2 single crystal using Bridgman method ( Zhang et al., 2018a , 2018b ). Figure 3 shows the NIR emission spectra of prepared samples.…”
Section: Known Bi-doped Nir Luminescent Crystalsmentioning
confidence: 99%
“… Figure 3 NIR Emission of Yb/Bi:PbF 2 , Bi:PbF 2 , and Yb:PbF 2 Crystals under 600 nm Excitation. Reproduced with permission ( Zhang et al., 2018a ). Copyright 2018, Optical Society of America.…”
Section: Known Bi-doped Nir Luminescent Crystalsmentioning
confidence: 99%
“…However, the authors found efficient NIR luminescence if co-doped with Yb 3+ ions, in which energy transfer from Yb to Bi should explain this phenomenon ( Xiong et al., 2012 ). Another way to enhance NIR emission has also been reported in Bi/Ta co-doped Gd 0.1 Y 0.9 AlO 3 single crystal, because the introduction of Ta 5+ can effectively lead to the change of valence states from Bi 3+ to Bi + based on the charge compensation mechanism ( Zhang et al., 2018a , 2018b ).…”
Section: Known Bi-doped Nir Luminescent Crystalsmentioning
confidence: 99%
“…Afterward, in 2012, Peng et al proposed that Bi 0 could also act as the NIR center in chloride of Ba 2 B 5 O 9 Cl (Zheng et al, 2012). Although they Reproduced with permission (Zhang et al, 2018a (Peng et al, 2010), the introduction of Bi 0 into Bi-doped NIR luminescent chlorides should be an important leap. First, samples of Ba 2(1-x) B 5 O 9 Cl:2x% sintered under air showed no NIR emission.…”
Summary
Bismuth (Bi)-doped materials are capable of exhibiting broadband near-infrared (NIR) luminescence in 1,000–1,700 nm; driven by the potential use in lasers and broadband optical amplifiers for modern fiber communication systems, Bi-activated NIR luminescencent glasses and related devices have attracted much attention. Compared with glass systems, Bi-doped crystals as gain media usually have more regular crystal structures to produce stronger NIR signals, and developing such materials is highly desirable. Regarding the recent advances in Bi-doped NIR crystals, here, for the first time, we summarized such crystals listed as two main categories of halogen and oxide compounds. Then, by comparing the substitution site, coordination environment, emission and excitation luminescence peaks, emitting center species, and decay times of these known Bibased NIR crystals, discussion on how to design Bi-doped NIR crystals is included. Finally, the key challenges and perspectives of Bi-doped NIR crystals are also presented. It is hoped that this review could offer inspiration for the further development of Bi-doped NIR luminescent crystals and exploit its potential applications.
“…Especially, through their co-doping, more broader and stronger emission and gain can be achieved, like Bi/Er [7,[35][36][37], Bi/Tm [38,39], etc. [40,41].…”
Section: Challenges and Opportunities Of Bismuth Doped Optical Fiber mentioning
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