Patent ID: 11898958
Assignee: KATHOLIEKE UNIVERSITIET
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 4:
5. The method according to claim 1, wherein determining the trap density comprises determining the trap density using:, I
    ind
   
   
    I
    dir
   
  
  ∝
  
   
    1
    
     
      
       τ
       
        
         r
         ⁢
         ad
        
        -
        ind
       
       
        e
        ⁢
        f
        ⁢
        f
       
      
      ⁢
      B
      ⁢
      
       n
       d
      
      ⁢
      
       
        N
        2
       
       (
       
        1
        -
        
         F
         d
        
       
       )
      
     
     +
     1
     +
     a
    
   
   +
   b
  
 

wherein τrad−indeff is a radiative lifetime of electron-hole pairs in the indirect bandgap, B is the Auger rate constant, N is the carrier concentration, nd the trap density, Fd the defect occupancy state, and a and b are correction terms which account for experimental uncertainties.