| 
                Optical Materials
 | 
                    | 
          
            | 
                
                   Optical Functional Materials for LEDs | 
          
            |  Luminescent Nanoparticles | 
          
            |  NIR-Emitting Lanthanide Ions for Sensors | 
          
            |  New Materials for Energy-Saving Solar Cells | 
          
            |  Upconversion-Processes and High/Low-Spin States of Lanthanide Ions | 
          
            |  Luminescence Amplification of Transition Metals by Divalent Lanthanide Ions | 
          
            |  Luminescence Properties of s2-Ions | 
          
            | 
                
                  
                    
                      
                        
                          
                            
                               Optical Properties of Defects | 
          
            | New Compouds
 | 
          
            |  Sb3+-Compounds | 
          
            |  Tricyanomethanides |