Study on solid structure of pentacene thin films using Raman imaging
Version of Record online: 16 OCT 2012
Copyright © 2012 John Wiley & Sons, Ltd.
Journal of Raman Spectroscopy
Volume 43, Issue 12, pages 2015–2019, December 2012
How to Cite
Seto, K. and Furukawa, Y. (2012), Study on solid structure of pentacene thin films using Raman imaging. J. Raman Spectrosc., 43: 2015–2019. doi: 10.1002/jrs.4090
- Issue online: 14 DEC 2012
- Version of Record online: 16 OCT 2012
- Manuscript Accepted: 18 MAR 2012
- Manuscript Received: 4 DEC 2011
- Raman chemical imaging;
- organic thin films;
- organic semiconductors;
We present a 532-nm excited Raman imaging study of pentacene thin films (thickness, 2, 5, 10, 20, 50, 100, and 150 nm) prepared on an SiO2 surface. The structure of the pentacene films has been investigated by images and histograms of the ratio (R) of intensity of the 1596-cm−1 band (b3g) to that of the 1533-cm−1 band (ag), which can be used as a marker of solid-state phases: 1.54-nm and 1.44-nm phases. The Raman images showed that island-like 1.44-nm phase domains are grown on the 1.54-nm phase layer from 50 nm, and all the surface of the 1.54-nm phase layer is covered with the 1.44-nm phase layer from 100 nm. The structural disorders have been discussed on the basis of the full width at half maximum of a band in the histogram of the R values for each film. Copyright © 2012 John Wiley & Sons, Ltd.