Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1443517 | Synthetic Metals | 2007 | 4 Pages |
Abstract
The paper analyses the interrelation between the signal frequency response in an organic planar photodetector and the distribution of traps of the active material playing a fundamental role in the transport of charge carriers. In particular, the response of a dithiolene-based photodetector spectrally matched to the near infrared has been acquired under optical pulses ranging from 10Â Hz to 1Â MHz in frequency. By means of modulated photocurrent spectroscopy, the trap density distribution of the dithiolene in the solid state has been extracted. The capture and release of photogenerated carriers exerted by a Gaussian density of trapping states, located 0.42Â eV below the transport energy, is shown to be the responsible for the observed device frequency response.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Biomaterials
Authors
T. Agostinelli, M. Caironi, D. Natali, M. Sampietro, M. Arca, F.A. Devillanova, V. Ferrero,