کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5186218 | 1381098 | 2006 | 4 صفحه PDF | دانلود رایگان |
Two-dimensional Raman spectroscopy has been applied to provide the information on charge carriers and thermal stability of a doped poly(3-chlorothiophene) (PCTh) film. The strong spectral intensity at 1420Â cmâ1 shows that positive polarons are the major charge carriers in doped PCTh. On the other hand, peaks in the 2D contour maps separate the overlapped bands around 1386Â cmâ1, confirming the existence of positive bipolarons in PCTh. The positive asynchronous cross peak located at 1420/1386Â cmâ1 further indicates that bipolarons have a higher thermal stability compared with polarons in the doped PCTh. The increase of the spectral intensity at 1454Â cmâ1 and the decrease of the spectral intensity at 1420Â cmâ1 indicate that during the heating process, a structural change occurs in the PCTh film.
Journal: Polymer - Volume 47, Issue 20, 20 September 2006, Pages 7111-7114