The Novel Approach for Multi-layered Thin Film Inspection Based on 3D Surface Reconstruction

2014 ◽  
Author(s):  
Han Kyun Choi ◽  
Hyunsuk Kim ◽  
Youngjun Roh ◽  
Seonghoon Kim ◽  
Heegu Yang ◽  
...  
Keyword(s):  
Thin Film ◽  
Surface Reconstruction ◽  
The Novel ◽  
3D Surface Reconstruction ◽  
3D Surface ◽  
Novel Approach ◽  
Layered Thin Film

Quantum-kinetic Theory of Defect-mediated Recombination in Nanostructure-based Photovoltaic Devices

2013 ◽  
Vol 1493 ◽  
pp. 91-96 ◽  
Author(s):  
Urs Aeberhard
Keyword(s):  
Thin Film ◽  
Energy Gap ◽  
Photovoltaic System ◽  
Quasi Equilibrium ◽  
The Novel ◽  
Photovoltaic Devices ◽  
Novel Approach ◽  
Gap States ◽  
Non Equilibrium Green’S Function ◽  
Kinetic Treatment

ABSTRACTIn this paper, a quantum-kinetic equivalent of Shockley-Read-Hall recombination is derived within the non-equilibrium Green's function formalism for a photovoltaic system with selectively contacted extended-state absorbers and a localized deep defect state in the energy gap. The novel approach is tested on a homogeneous bulk absorber and then applied to a thin film photo-diode with large built-in field in the defect-rich absorber region. While the quantum-kinetic treatment reproduces the semi-classical characteristics for a bulk absorber in quasi-equilibrium conditions, for which the latter picture is valid, it reveals in the thin film case non-classical characteristics of recombination enhanced by tunneling into field-induced sub-gap states.

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