Effect of Bi3+ doping on the quenching concentration of 2H11/2/4S3/2 level of Er3+

- The quenching concentration of 2H11/2/4S3/2 levels of Er3+ increases by 2 mol% after the doping of 1.5 mol% Bi3+.
- The green emission is enhanced 1.9 times by the doping of Bi3+.
- The enhancement of green emission comes from the increases in both quenching concentration of 2H11/2/4S3/2 and radiative transition.