Emission Analysis Of Pr3+: PVPAnd Nd3+: PVPFilms

Here we report on the results concerning the absorption and emission spectra of RE 3+ ( Pr 3+ or Nd 3+ ) doped PVP polymer films. The absorption spectrum of Pr 3+ : PVP polymer film has shown three absorption bands at 444 nm ( 3 H 4 → 3 P 2 ), 469nm ( 3 H 4 → 3 P 1 ) and 481nm ( 3 H 4 → 3 P 0 ). From the Pr 3+ : PVP polymer film, an emission at 603 nm ( 1 D 2 → 3 H 4 ) has been observed with an excitation at 443 nm ( 3 H 4 → 3 P 2 ). The absorption spectrum of Nd 3+ : PVP polymer film has exhibited eleven absorption bands at 324 nm, 383 nm, 432 nm, 462 nm, 511 nm, 526 nm, 580 nm, 686 nm, 746 nm, 799 nm, and 869 nm which are assigned to the electronic transitions of 4 I 9/2 → 4 D 7/2 , 4 I 9/2 → 2 D 3/2 , 4 I 9/2 → 4 P 1/2 , 4 I 9/2 → 4 G 11/2 , 4 I 9/2 → 4 G 9/2 , 4 I 9/2 → 4 G 7/2 , 4 I 9/2 → 4 G 5/2 , 4 I 9/2 → 2 F 9/2 , 4 I 9/2 → 2 F 7/2 , 4 I 9/2 → 2 H 9/2 and 4 I 9/2 → 4 F 3/2 respectively. From the Nd 3+ : PVP polymer film, an emission transition has been measured at 1055 nm ( 4 F 3/2 → 4 I 11/2 ) with an excitation at 324 nm ( 4 I 9/2 → 4 D 7/2 ). For the host polymer film, structural properties have been studied from the measurement of XRD, FTIR, Raman spectra. For this film thermal properties have also been investigated from the measured profiles of TGA‐DTA.