Skip to Main content Skip to Navigation
Journal articles

Impact of Blend Morphology on Interface State Recombination in Bulk Heterojunction Organic Solar Cells

Abstract : This work is a re-investigation of the impact of blend morphology and thermal annealing on the electrical performance of regioregular P3HT:PC 60 BM. The blend is first characterized by combining atomic force microscopy, X-rays diffraction and Time-of-Flight experiments. Then, current-voltage characteristics of photodiode devices are measured in the dark and under illumination. Finally, the existence of exponential tails of electronic gap states is experimentally confirmed by measuring the device spectral response in the sub-band gap regime. This method reveals the existence of a large density of gap states, which is partially reduced by successive annealing steps. The comparison between drift and diffusion 2 simulations and charge transport experiments show that, when band gap tails are properly taken into account, simulations can satisfactorily reproduce experimental currents under both dark and illumination conditions as a function of voltage and annealing time. This work further confirms the critical impact of tails states on the performance of solar cells.
Complete list of metadatas

Cited literature [30 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01100102
Contributor : Raphael Clerc <>
Submitted on : Monday, January 12, 2015 - 12:11:31 PM
Last modification on : Monday, August 31, 2020 - 3:54:16 PM
Long-term archiving on: : Monday, April 13, 2015 - 10:12:48 AM

Files

Bouthinon_article_AFM_revised....
Files produced by the author(s)

Identifiers

Citation

Benjamin Bouthinon, Raphaël Clerc, Jérôme Vaillant, J.-M Verilhac, Jérôme Faure-Vincent, et al.. Impact of Blend Morphology on Interface State Recombination in Bulk Heterojunction Organic Solar Cells. Advanced Functional Materials, Wiley, 2015, pp.10.1002/adfm.201401633. ⟨10.1002/adfm.201401633⟩. ⟨hal-01100102⟩

Share

Metrics

Record views

906

Files downloads

906