Charge carrier lifetime in DLC films |
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| Affiliation: | 1. School of Physics, University of Sydney, Sydney, NSW 2006, Australia;2. EMPA – Swiss Federal Labs for Material Science and Technology, Duebendorf CH 8600, Switzerland;3. School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, Sydney, NSW 2006, Australia;4. School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China;5. University of Sydney Nano Institute, University of Sydney, Sydney, NSW 2006, Australia |
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| Abstract: | Diamond-like carbon (DLC) layers deposited at room temperature in 13.56 MHz radio-frequency methane (CH4) plasma have been studied. The results of transient currents for DLC thin films are reported. The carrier's lifetime was determined based on the transient current analysis for the surface and bulk recombinations: trs=0.3 ms, trv=0.11 ms. These values seem to be relatively high for structures of this type. The diffusion length for DLC films L*=0.67×10−4 cm. Other parameters such as the diffusion coefficient D*=4×10−5 cm2/s and surface recombination rate S=0.37 cm/s are exceptionally small here. |
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