Photoinduced Absorption within Single-Walled Carbon Nanotube Systems

Glanzmann, Livia Noëmi; Mowbray, Duncan John; Valle, Diana Gisell Figueroa del; Scotognella, Francesco; Lanzani, Guglielmo; Rubio, Angel

doi:10.1021/acs.jpcc.5b10025

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Photoinduced Absorption within Single-Walled Carbon Nanotube Systems

MPS-Authors

/persons/resource/persons22028

Rubio, Angel
Nano-Bio Spectroscopy Group and ETSF Scientific Development Center, Departamento de Física de Materiales, Centro de Física de Materiales CSIC-UPV/EHU-MPC Universidad del País Vasco UPV/EHU and DIPC, E-20018 San Sebastián, Spain;
Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

External Resource

http://dx.doi.org/10.1021/acs.jpcc.5b10025
(Publisher version)

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Glanzmann, L. N., Mowbray, D. J., Valle, D. G. F. d., Scotognella, F., Lanzani, G., & Rubio, A. (2016). Photoinduced Absorption within Single-Walled Carbon Nanotube Systems. The Journal of Physical Chemistry C, 120(3), 1926-1935. doi:10.1021/acs.jpcc.5b10025.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-77E4-F

Abstract

We study the photoabsorption properties of photoactive bulk polymer/fullerene/nanotube heterojunctions in the near-infrared region. By combining pump–probe spectroscopy and linear response time-dependent density functional theory within the random phase approximation (TDDFT-RPA) we elucidate the excited state dynamics of the E₁₁ transition within (6,5) and (7,5) single-walled carbon nanotubes (SWNTs) and combined with poly(3-hexylthiophene-2,5-diyl) (P3HT) and [6,6]-phenyl-C₆₁-butyric acid methyl ester (PCBM) in P3HT/PCBM/SWNT blended samples. We find the presence of a photoinduced absorption (PA) peak is related mainly to the width of the photobleach (PB) peak and the charge carrier density of the SWNT system. For mixed SWNT samples, the PB peak is too broad to observe the PA peak, whereas within P3HT/PCBM/SWNT blended samples P3HT acts as a hole acceptor, narrowing the PB peak by exciton delocalization, which reveals a PA peak. Our results suggest that the PA peak originates from a widening of the band gap in the presence of excited electrons and holes. These results have important implications for the development of new organic photovoltaic heterojunctions including SWNTs.