Study of interfaces in organic semiconductor heterojunctions

P Maheshwari, D Dutta, K Sudarshan, S K Sharma, S Samanta, A Singh, D K Aswal, P K Pujari
2011 Journal of Physics, Conference Series  
be crucial for the device efficiency [14, 15] . Phthalocyanines are a class of low molecular weight organic molecules, exhibiting semiconductor properties. Abstract Abstract Abstract Abstract Abstract The defect structure at the organic heterojunctions is studied, using slow positron beam. The structural and electronic properties of heterojunctions are of technological and fundamental importance, for understanding and optimization of electronic processes in organic devices. Interface trap
more » ... s play a significant role in the electrical conduction through the junctions. Depth dependent Doppler broadened annihilation measurements have been carried out in p-and n-type organic semiconductor thin films (30-80 nm), both single as well as multilayers grown on quartz substrate. The objective of the present study is to investigate the defect structure and to understand the behavior of positrons at the charged organic interfaces. Our result shows the sensitivity of positrons to the interfacial disorders that may be a convoluted effect of the presence of defects as well as the influence of the charge dipole in multilayers.
doi:10.1088/1742-6596/262/1/012036 fatcat:tlvieirn5fbfnabia3leeu4irm