Comparison with Other Luminescence

In the previous activities we used energy band models to explain fluorescent and phosphorescent materials.

1. How is the energy band model used to explain the IR detector card similar to the energy band model used to explain fluorescence?
2. How are the models different?
3. How is the energy band model used to explain the IR detector material similar to the model used to explain phosphorescence?
   
4. How are these models different?