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- Title
Selective Chain Alignment of Conducting Polymer Blend Films by an Ultrafast Laser.
- Authors
Chae, Sangmin; Jo, Kuk Hyun; Lee, Si Woo; Keum, Hee‐Sung; Kim, Hyo Jung; Choi, Jiyeon; Lee, Hyun Hwi
- Abstract
Tunable and selective areal polymer chain alignment method is developed for spin-cast blend films of poly(3-hexylthiophene)(P3HT):[6,6]-phenyl-C61-butlyric methyl ester (PCBM) system by a femtosecond laser process. The chain alignment, phase separation, and molecular structure of the laser exposed P3HT:PCBM films are investigated by grazing incidence wide angle X-ray scattering and micro-Raman analysis. The alkyl chains of P3HT polymer become highly ordered along the polarization axis of the laser. Thus, the amount of desirable face-on configuration for solar cell application is largely enhanced with a subsequent postannealing process. Vertically expanded morphology up to 200 nm on P3HT:PCBM films is also prompted by the laser irradiation without deteriorating intramolecular structure and changing chemical composition. Simultaneously, vertical phase separation of PCBM toward surface is induced at exposed region.
- Subjects
POLYMERASE chain reaction; POLYMER blends; MOLECULAR structure; X-ray scattering; CONJUGATED polymers
- Publication
Macromolecular Chemistry & Physics, 2016, Vol 217, Issue 4, p537
- ISSN
1022-1352
- Publication type
Article
- DOI
10.1002/macp.201500354