Concentration effect of Yb3+ on the thermal and optical properties of Er3+/Yb3+-codoped ZnF2–Al2O3–P2O5 glasses

Thermal, chemical, optical properties and structure of Er3+-doped and Er3+/Yb3+-codoped P2O5–Al2O3–ZnO glasses

“…The phenomenon increases the population of 4 I 11/2 level and induces promotion of photo-luminescence efficiency at 1540 nm. However, in accordance with the literatures [12,23,24], excess rare-earth ions in many crystals, fiber amplifiers and glass systems causes the reduction of optical properties. This arises from two reasons, the concentration quenching and the formation of ions clustering.…”

“…However, the intensity of emission peak is slightly decreased when the Yb 2 O 3 concentration is higher than 3 mol%. This is attributed to the appearance of clustering and the concentration quenching effect at high rare-earth concentrations in most of glass systems [12,23,24].…”

“…However, these glasses have a relatively poor chemical durability that often limits their usefulness [10,11]. According to previous studies, the chemical durability of phosphate glasses can be improved by the addition of various rare-earth ions such as Er 3+ and Yb 3+ ions [12,13].…”

Multifunctional possible application of the Er3+/Yb3+-coped Al2O3 prepared by recyclable precursor (aluminum can) and also by sol-gel process

“…The continuous evolution of research of these materials in nanoscale structures and well controlled devices, has led to research in rare earth (RE 3+ ) doped materials [5][6][7]. Thus, the luminescence of the RE 3+ has attracted much attention because of their potential applications in photonics due to their photoluminescent properties, known since the 20th century [8][9][10][11]. Such applications include generator imaging devices, traditional lighting devices such as cathode ray tubes, fluorescent lamps, light emitting diodes, field emission displays, lasers [9], solar cells [12], biological markers [6] in sensors technology [13], in uniform fiber Bragg grating (FBG) [14], optical bistable device (OBD) [15], and more.…”

“…In order to contribute to a higher Er 3+ emission efficiency, since the absorption cross section in the 980 nm region of this ion is very low, around 1.7 × 10 −21 cm 2 [11,12], Yb 3+ is used as sensitizer. The Yb 3+ absorption band extends over a broader region of wavelength, between 850 and 1080 nm [9,28], being the most intense at 980 nm [8,29]. The co-doping of Yb 3+ produces enhancement of intense absorption due to the high cross section of Yb 3+ , about 11.7 × 10 −21 cm 2 , ten times more efficient than the Er 3+ , thus increases the optical pumping.…”