Research Article

Multiligand Europium Complexes Incorporated Polyvinylpyrrolidone for Enhanced Solar Cell

Figure 7

Schematic energy level diagram: energy transfer processes and different transitions in Eu(BA)(TTA)2/PVP (a) and Eu(BA)(TTA)2Phen/PVP (b). ISC, intersystem crossing, IC, internal conversion, ET, energy transfer, S, singlet, T, triplet, and NRR, nonradiative relaxation.
(a)
(b)