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Charge-carrier dynamics in hybrid plasmonic organic solar cells with Ag nanoparticles
3.Y. Liang, X. Zheng, J. Xia, S. Tsai, Y. Wu, G. Li, C. Ray, and L. Yu, Adv. Mater. (Weinheim, Ger.) 22, E135 (2010).
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See supplementary material at http://dx.doi.org/10.1063/1.3601742
for the details of device fabrication and for the UV-Visible light absorption and steady-state photoluminescence emission spectra of P3HT:Ag NP composite films with various P3HT:Ag NP weight ratios.[Supplementary Material]
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To understand the effects of Agnanoparticles (NPs) on the performance of organic solar cells, we examined the properties of hybrid poly(3-hexylthiophene):[6,6]-phenyl--butyric-acid-methyl-ester:Ag NP solar cells using photoinduced charge extraction with a linearly increasing voltage. We find that the addition of Ag NPs into the active layer significantly enhances carrier mobility but decreases the total extracted carrier. Atomic force microscopy shows that the Ag NPs tend to phase segregate from the organic material at high concentrations. This suggests that the enhanced mobility results from carriers traversing Ag NP subnetworks, and that the reduced carrier density results from increased recombination from carriers trapped on the Ag particles.
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