کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1671918 | 1008925 | 2007 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Morphology and environment-dependent fluorescence in blends containing a phenylenevinylene-conjugated polymer Morphology and environment-dependent fluorescence in blends containing a phenylenevinylene-conjugated polymer](/preview/png/1671918.png)
Near-field scanning optical microscopy and single-molecule spectroscopy have been employed to study a large number of blends containing a highly fluorescent and amorphous conjugated polymer, ‘superyellow’ (a phenylenevinylene copolymer). We find that blend films with a non-fluorescent and semi-crystalline polymer, poly(ethylene oxide) (PEO), with a superyellow content between 9 and 50 mass% exhibit phase separation with no evidence for admixing of the two components, while films with a lower superyellow content of ≤ 1 mass% content comprise a solid-state solution of superyellow within a crystalline PEO matrix. Interestingly, films with approximately the same amount of superyellow as PEO (similar to those used in, e.g., light-emitting electrochemical cells) exhibit a bi-continuous network morphology. We also report that the superyellow fluorescence spectrum shows a remarkable sensitivity to the physical and chemical environment of superyellow.
Journal: Thin Solid Films - Volume 515, Issue 23, 14 September 2007, Pages 8412–8418