Next Article in Journal
Evaluation of the Hepatoprotective Effects of Lantadene A, a Pentacyclic Triterpenoid of Lantana Plants against Acetaminophen-induced Liver Damage
Previous Article in Journal
Isolation and Identification of the Phenolic Compounds from the Roots of Sanguisorba officinalis L. and Their Antioxidant Activities
Article Menu

Export Article

Open AccessArticle
Molecules 2012, 17(12), 13923-13936; doi:10.3390/molecules171213923

Subnanosecond Charge Recombination Dynamics in P3HT/PC61BM Films

Center for Condensed Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, China
Department of Chemistry, Renmin University of China, Beijing 100872, China
Author to whom correspondence should be addressed.
Received: 25 October 2012 / Revised: 9 November 2012 / Accepted: 16 November 2012 / Published: 23 November 2012
Download PDF [365 KB, uploaded 18 June 2014]


Ultrafast near-infrared absorption spectroscopy was used to investigate the influence of film morphology and excitation photon energy on the charge recombination (CR) dynamics in the initial nanosecond timescale in the P3HT/PC61BM blend films. With reference to the CS2-cast films, the solvent vapor annealed (SVA) ones show 2–3-fold improvement in hole mobility and more than 5-fold reduction in the polymer-localized trap states of holes. At Dt = 70 ps, the hole mobility (mh) and the bimolecular CR rate (gbi) of the SVA films are mh = 8.7 × 10−4 cm2×s−1×V−1 and gbi = 4.5 × 10−10 cm3×s−1, whereas at Dt = 1 ns they drop to 8.7 × 10−5 cm2×s−1×V−1 and 4.6 × 10−11 cm3×s−1, respectively. In addition, upon increasing the hole concentration, the hole mobility increases substantially faster under the above-gap photoexcitation than it does under the band-gap photoexcitation, irrespective of the film morphologies. The results point to the importance of utilizing the photogenerated free charges in the early timescales.
Keywords: [6,6]-phenyl-C61-butyric acid methyl ester (PCBM); poly(3-hexylthiophene) (P3HT); solvent vapor annealing (SVA); time-resolved spectroscopy; bimolecular charge recombination; trap states [6,6]-phenyl-C61-butyric acid methyl ester (PCBM); poly(3-hexylthiophene) (P3HT); solvent vapor annealing (SVA); time-resolved spectroscopy; bimolecular charge recombination; trap states
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Supplementary material

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Zhang, W.; Zhao, N.-J.; Huo, M.-M.; Fu, L.-M.; Ai, X.-C.; Zhang, J.-P. Subnanosecond Charge Recombination Dynamics in P3HT/PC61BM Films. Molecules 2012, 17, 13923-13936.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Molecules EISSN 1420-3049 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top