Enhanced and shortened Mn^2+ emissions by Cu^+ co-doping in borosilicate glasses for W-LEDs

Cai, Qiaosong; Zhou, Fanliang; Yang, Ning; Xu, Haiyuan; Baccaro, S.; Cemmi, Alessia; Falconieri, M.; Chen, Guorong

doi:10.1364/ome.5.000051

Cited by 25 publications

(11 citation statements)

References 15 publications

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“…Most of these researches focus on trivalent rare‐earth ions (REI) doped glass. In recent years, the emergence of researches of white‐light‐emitting from rare‐earth‐free (REF) luminescent glass suggests that this kind luminescent glass seems to be a novel pc‐WLEDs material . This is because the REF luminescent glass not only shows white light emission comparable to the crystalline phosphor but also shows a broader emission band which could improve the color‐rendering property of the luminescent glass .…”

Section: Introductionmentioning

confidence: 99%

“…This is because the REF luminescent glass not only shows white light emission comparable to the crystalline phosphor but also shows a broader emission band which could improve the color‐rendering property of the luminescent glass . For example, Chen et al investigated the Cu/Mn codoped white light glass; Masai et al discovered the Mn/Sn codoped white light glass . However, the former work failed to obtain warm WLED glass (low color temperature); the latter work has not yet clarified the mechanism of the light observed in the glass.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, the emergence of researches of white-light-emitting from rare-earth-free (REF) luminescent glass suggests that this kind luminescent glass seems to be a novel pc-WLEDs material. 12,18,19 could improve the color-rendering property of the luminescent glass. 19 For example, Chen et al investigated the Cu/Mn codoped white light glass 18 ; Masai et al discovered the Mn/ Sn codoped white light glass.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced luminescence of manganese in singly doped white light zinc phosphate glass

et al. 2019

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On the basis of a kind of zinc phosphate oxynitride glass matrix with a broadband blue light, a series of manganese single‐doped glasses were obtained. A broader red emission with the higher intensity belonging to the Mn2+ ion was observed in this glass matrix. The mechanism of the emission from Mn2+ ions was clarified through Mn3+ as an “energy acquisition probe” to replace complex dynamic luminescence discussion, which was a fit explanation for the differences in luminescence behavior of Mn ions in prepared glasses at different degrees of redox. The research results indicated that the prepared manganese‐doped glass was a potential candidate as phosphor‐converted white‐light‐emitting diodes. An encapsulated white‐light‐emitting diode device based on this glass with 276 nm ultraviolet chip was achieved. It showed the CIE values of (0.33, 0.35), high CRI (Ra = 86), and low color temperature (5228 K).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhanced luminescence of manganese in singly doped white light zinc phosphate glass

et al. 2019

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“…4a, Table 3), which is shortened to 34.2 μs up on Tb 3+ co-doping (G3), consistent with the above suggested ET from Cu + to Tb 3+ . The evaluated energy transfer efficiency η T ( η T = 1 − τ s / τ s0 , where τ s and τ s0 are decay times of Cu + with and without Tb 3+ ) is ~14.1%, which is too low to account for the drastically enhanced Tb 3+ emission18.…”

Section: Discussionmentioning

confidence: 97%

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

Xia

Liu

Wang

et al. 2015

Sci Rep

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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.

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“…To enhance PL properties of Mn 2+ ‐doped phosphors, great efforts have been made by utilizing energy‐transfer (ET) mechanisms from different sensitizers, and the remarkable effects have been reported with codoped Ce 3+ , Eu 2+ , Cu + and Sn 2+ etc . Recently, the remarkable development of group III‐nitride‐based UV diodes has been achieved and correspondingly investigations on phosphors to be coupled with deep‐UV LED chip have become especially potential.…”

Section: Introductionmentioning

confidence: 99%

Expanded and Enhanced Deep‐UV Excitations of Mn²⁺‐Doped Phosphate Glasses Sensitized by Gd³⁺ Ions

et al. 2015

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Mn 2+ -doped phosphate glasses sensitized by Gd 3+ ions are investigated. Enhanced photoluminescence (PL) properties of the samples are found with the excitations expanding toward the deep-UV part of the spectrum. PL emission and excitation spectra correlated with the lifetime data consistently present evidences of the enhanced Mn 2+ emission in association with the energy transfer from Gd 3+ ions. In particular, the Gd 3+ codoping benefits greatly the energy harvesting of Mn 2+ ions, resulting in the enhanced and tunable excitations of Mn 2+ ions which expand toward the deep-UV part of the spectrum at 273 and 311 nm, respectively. Thus by Gd 3+ sensitizing, the excitation source of the Mn 2+ emission has covered the broad range of the spectrum from the original blue and near-UVA to the deep-UVB and UVC together with the enhanced emission in the green-to-red spectral region. The possible energy-transfer mechanisms involved are discussed.

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Enhanced and shortened Mn^2+ emissions by Cu^+ co-doping in borosilicate glasses for W-LEDs

Cited by 25 publications

References 15 publications

Enhanced luminescence of manganese in singly doped white light zinc phosphate glass

Enhanced luminescence of manganese in singly doped white light zinc phosphate glass

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

Expanded and Enhanced Deep‐UV Excitations of Mn²⁺‐Doped Phosphate Glasses Sensitized by Gd³⁺ Ions

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Enhanced and shortened Mn^2+ emissions by Cu^+ co-doping in borosilicate glasses for W-LEDs

Cited by 25 publications

References 15 publications

Enhanced luminescence of manganese in singly doped white light zinc phosphate glass

Enhanced luminescence of manganese in singly doped white light zinc phosphate glass

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

Expanded and Enhanced Deep‐UV Excitations of Mn2+‐Doped Phosphate Glasses Sensitized by Gd3+ Ions

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Expanded and Enhanced Deep‐UV Excitations of Mn²⁺‐Doped Phosphate Glasses Sensitized by Gd³⁺ Ions