Estimation of the ideality factor of ZnTe/CdTe p-p heterojunction diodes
                
                        
                        K. ALFARAMAWI1,*
                            
                        
                    
                    Affiliation
                    
                        
                        - Physics Department, Alexandria University, Faculty of Science, Moharam Beck, Alexandria, Egypt
 
                        
                    
                     
        
        Abstract
        Direct analytical method for estimating the ideality factor of ZnTe/CdTe isotype p-p heterojunction diodes is reported. The 
calculations were performed at two temperatures 300 K and 200 K. Simulations, considering the series and shunt 
parasitics, showed ideality factor values of 6.9 and 22.4 at 300 K and 200 K respectively. These values were compared with 
those extracted from the dark current-voltage curves which are 6.5 and 28.2 at the same temperatures. The large ideality 
factor in this system (particularly at low temperature) was attributed to the presence of high density of interface states 
(typically ~ 1013 cm-2).
        Keywords
        Heterojunction diode, Ideality factor, Interface states.
        Citation
        K. ALFARAMAWI, Estimation of the ideality factor of ZnTe/CdTe p-p heterojunction diodes, Optoelectronics and Advanced Materials - Rapid Communications, 2, 12, December 2008, pp.763-765 (2008).
        Submitted at: Nov. 14, 2008
 
        Accepted at: Dec. 4, 2008