Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 1, Issue 4, Pages 734-738Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jz900296f
Keywords
-
Categories
Funding
- BP Solar
- Engineering and Physical Sciences Research Council [EP/F016255/1, EP/F000375/1] Funding Source: researchfish
- EPSRC [EP/F016255/1, EP/F000375/1] Funding Source: UKRI
Ask authors/readers for more resources
Herein we address the factors controlling photocurrent generation in P3HT:PCBM blend films as a function of blend composition and annealing treatment. Absorption, photoluminescence, and transient absorption spectroscopy are used to distinguish the role of exciton dissociation, charge pair separation, and charge collection. Variations in blend film microstructure with composition and annealing treatment are studied using X-ray diffraction. While the trend in photocurrent generation with composition and annealing [Muller, et al., Adv. Mater 2008, 20, 3510] does not follow the trend in exciton dissociation, it closely follows the trend in charge pair generation. Moreover, charge pair generation efficiency is positively correlated to the degree of polymer crystallization and the appearance of large domains of both polymer and fullerene phases. We argue that larger domains assist charge pair separation by increasing the probability of escape from the P3HT:PCBM interface, thus reducing geminate charge recombination.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available