Broad Spectral Response Using Carbon Nanotube/Organic Semiconductor/C60 Photodetectors
| Autor: | Richard R. Lunt, Xin Xu, Stephen R. Forrest, Michael S. Arnold, Jeramy D. Zimmerman, Christine M. Austin, Christopher Kyle Renshaw |
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| Rok vydání: | 2009 |
| Předmět: |
Materials science
Photochemistry Polymers Surface Properties Band gap Bioengineering Carbon nanotube Specific detectivity law.invention law Materials Testing Nanotechnology General Materials Science Particle Size Photocurrent Nanotubes Carbon business.industry Mechanical Engineering Photoconductivity Heterojunction General Chemistry Condensed Matter Physics Acceptor Organic semiconductor Semiconductors Quantum Theory Optoelectronics Fullerenes business |
| Zdroj: | Nano Letters. 9:3354-3358 |
| ISSN: | 1530-6992 1530-6984 |
| DOI: | 10.1021/nl901637u |
| Popis: | We demonstrate that photogenerated excitons in semiconducting carbon nanotubes (CNTs) can be efficiently dissociated by forming a planar heterojunction between CNTs wrapped in semiconducting polymers and the electron acceptor, C(60). Illumination of the CNTs at their near-infrared optical band gap results in the generation of a short-circuit photocurrent with peak external and internal quantum efficiencies of 2.3% and 44%, respectively. Using soft CNT-hybrid materials systems combining semiconducting small molecules and polymers, we have fabricated broad-band photodetectors with a specific detectivity10(10) cm Hz(1/2) W(1-) from lambda = 400 to 1450 nm and a response time of tau = 7.2 +/- 0.2 ns. |
| Databáze: | OpenAIRE |
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