Figure 6
Emission spectrum of PPV copolymers P1–P6 (0.25 mg/ml) and MEH-PPV (0.5 mg/ml) with PdTPTBP (7.5 μM) as the sensitizer in chloroform solution using 632 nm wavelength and 10,468 mW/cm2 power excitation without (a) and with (b) the use of a 600 nm short band pass filter. (a) Shows the phosphorescence emission of PdTPTBP centered at 800 nm as seen in the sensitizer-only sample, as well as the upconverted emission of the samples from 550 to 600 nm.
