Influence of copolymer interface orientation on the optical emission of polymeric semiconductor heterojunctions |
| |
Authors: | Sreearunothai P Morteani A C Avilov I Cornil J Beljonne D Friend R H Phillips R T Silva C Herz L M |
| |
Affiliation: | Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge CB3 0HE, United Kingdom. |
| |
Abstract: | We have examined the Coulombic interactions at the interface in a blend of two copolymers with intramolecular charge-transfer character and optimized band offsets for photoinduced charge generation. The combination of both time-resolved measurements of photoluminescence, and quantum-chemical modeling of the heterojunction allows us to show that relative orientation across the heterojunction can lead to either a repulsive barrier ( approximately 65 meV) or an attractive interaction which can enhance the charge-transfer processes. We conclude that polymer orientation at the heterojunction can be as important as energy-band offsets in determining the dynamics of charge separation and optical emission. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|