Please use this identifier to cite or link to this item: https://ktisis.cut.ac.cy/handle/10488/18302
Title: Carrier motion in as-spun and annealed P3HT:PCBM blends revealed by ultrafast optical electric field probing and Monte Carlo simulations
Authors: Abramavičius, Vytautas 
Amarasinghe Vithanage, Dimali 
Devižis, Andrius 
Infahsaeng, Yingyot 
Bruno, Annalisa 
Foster, Samuel 
Keivanidis, Panagiotis E. 
Abramavičius, Darius 
Nelson, Jenny 
Yartsev, Arkady 
Sundstrom, Villy 
Gulbinas, Vidmantas 
Major Field of Science: Engineering and Technology
Field Category: Electrical Engineering - Electronic Engineering - Information Engineering
Issue Date: 14-Feb-2014
Source: Physical Chemistry Chemical Physics, 2014, vol. 16, no. 6, pp. 2686-2692
Volume: 16
Issue: 6
Start page: 2686
End page: 2692
Journal: Physical Chemistry Chemical Physics 
Abstract: Charge transport dynamics in solar cell devices based on as-spun and annealed P3HT:PCBM films are compared using ultrafast time-resolved optical probing of the electric field by means of field-induced second harmonic generation. The results show that charge carriers drift about twice as far during the first 3 ns after photogeneration in a device where the active layer has been thermally annealed. The carrier dynamics were modelled using Monte-Carlo simulations and good agreement between experimental and simulated drift dynamics was obtained using identical model parameters for both cells, but with different average PCBM and polymer domain sizes. The calculations suggest that small domain sizes in as-spun samples limit the carrier separation distance disabling their escape from geminate recombination.
URI: https://ktisis.cut.ac.cy/handle/10488/18302
ISSN: 1463-9084
DOI: 10.1039/c3cp54605e
Rights: © Royal Society of Chemistry
Type: Article
Affiliation : Center for Physical Sciences and Technology 
Vilnius University 
Lund University 
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