Physico-chemical analysis of white light-emitting Eu, Dy and Cu tri-doped plasmonic glasses synthesized via nanodiamond

Nanodiamond‐promoted white light emission in Eu, Dy, and Cu‐containing phosphate glass: quantitative analysis and colorimetric study

“…[ 10 ] A focal point in this study was to evaluate the effect of copper nanoparticles (NPs) induced by a thermal treatment performed post‐synthesis. [ 10 ] Ultimately, it was observed that the white light‐emitting characteristics of the copper co‐doped plasmonic glass deteriorated due to the formation of Cu NPs with strong plasmonic absorption and a colour shift towards the red region. [ 10 ] Realizing the potential of the as‐synthesized glass, precluding the precipitation of metallic copper, the present work has focused on a detailed spectroscopic analysis carried out on glass containing Eu 2 O 3 and Dy 2 O 3 , or Eu 2 O 3 , Dy 2 O 3 , and CuO melted together with ND powder.…”

“…[ 10 ] Ultimately, it was observed that the white light‐emitting characteristics of the copper co‐doped plasmonic glass deteriorated due to the formation of Cu NPs with strong plasmonic absorption and a colour shift towards the red region. [ 10 ] Realizing the potential of the as‐synthesized glass, precluding the precipitation of metallic copper, the present work has focused on a detailed spectroscopic analysis carried out on glass containing Eu 2 O 3 and Dy 2 O 3 , or Eu 2 O 3 , Dy 2 O 3 , and CuO melted together with ND powder. To help assess their potential for application in W‐LEDs, a rigorous analysis was performed in which novel spectral analyses were carried out.…”

“…[ 19 ] Furthermore, phosphate glass containing Eu 2 O 3 , Dy 2 O 3 and CuO melted with ND powder was studied with regards to optical and plasmonic properties, while targeting white light by combining emission from Eu 3+ (red‐emitting), Dy 3+ (yellow‐emitting), and Cu + (blue‐emitting) ions. [ 10 ] A focal point in this study was to evaluate the effect of copper nanoparticles (NPs) induced by a thermal treatment performed post‐synthesis. [ 10 ] Ultimately, it was observed that the white light‐emitting characteristics of the copper co‐doped plasmonic glass deteriorated due to the formation of Cu NPs with strong plasmonic absorption and a colour shift towards the red region.…”

“…In this context, doping with rare-earth (RE) ions such as Sm 3+ , Eu 3+ , Dy 3+ , and additionally noble metals, has been pursued seeking the realization of white-light emission. [2,3,[10][11][12][13] Copper has been especially attractive within the noble metals due to its relatively high abundance and desirable photoluminescence properties. [1][2][3]6] There is a problem, however, concerning material synthesis because, whereas the luminescent Cu + valence is desired, [1,2,6] copper also tends to occur as Cu 2+ ions which do not luminesce and act as emission quenchers, therefore deteriorating optical performance.…”

“…[14][15][16] An approach recently proposed by several authors to reduce Cu 2+ in glass during melting relies on the use of carbon in the form of nanodiamond (ND) powder, C ND. [10,[17][18][19] It has been found valuable for obtaining plasmonic glass due to the Cu 2+ !Cu + !Cu 0 valence state changes induced, ] 10,17] , and also for realization of high ultraviolet (UV) light transparency. [18] Additionally, it facilitated the reduction of red-emitting Eu 3+ ions to blue-emitting Eu 2+ in phosphate glass, therefore enabling the shift in colour coordinates based on C ND concentration.…”