Blanc Inter SIMI 9 - Blanc international - Sciences de l'information, de la matière et de l'ingénierie : Sciences de l'ingénierie, matériaux, procédés, énergie

All-Polymer Solar Cells – POLYSOLPV

Submission summary

POLYSOLPV HAs the objective to demonstrate over the next 3 years a new generation of cheap and printable polymer-based solar cells with a power conversion efficiency of 9-10%. The cost of photovoltaic cells based on silicon has been a major impediment to their widespread deployment and organic photovoltaic technology offers a good avenue to decrease that cost and to find new niches of applications related to their light-weight and their flexibility. The technology to be demonstrated will use novel n-type conjugated polymers based on either thieno[3,4-c]pyrrole-4,6-dione or bridged thiazole units. These electron-withdrawing co-monomers should decrease both the HOMO and LUMO energy levels when used as co-monomers in donor/acceptor type conjugated polymers. A deeper HOMO-LUMO level should then facilitate the injection and transport of negative charge carriers. These polymeric materials will replace the presently used fullerene derivatives which poorly contribute to the absorption of the light coming from the sun. The development of such novel n-type polymers will also allow the fine tuning of the electronic properties in order to maximize the open circuit voltage of the proposed all-polymer solar cells. The synthetic part will be mainly carried out by the research group of Professor Mario Leclerc at Université Laval, supported by chemists from Saint-Jean Photochemicals (SJPC) and PCAS. This combination of expertises should lead to well-defined and cost-efficient polymeric materials. These new polymers will be fully characterized by using state-of-the-art techniques available at Université Laval and at Commissariat à l’Énergie Atomique. The team of Stéphane Guillerez will study the electron mobility of the n-type polymers both in field-effect transistor configuration and in electron only devices in the Space Charge Limited Current regime. They will prepare several polymer blends and morphological studies will be performed on thin films of blends using different donor/acceptor ratios. Solvent effect and thermal treatments will also be investigated. Moreover, with the aim of determining the best compositions for films composed of p and n polymers in the solar cell architecture, hole and electron motilities will be characterised and correlated with film morphology. To make this three year research project a success, four chemists will focus their energy during the first two years to develop and characterize the proposed polymeric structures. This part of the project will involve a budget of 125 000$ for the first year and of 133 000$ for the second one. In the third year, two Ph.D. students will collaborate with SJPC and PCAS to optimize the two most promising polymeric materials which imply a budget of 56 000$ for Prof. Mario Leclerc team. In parallel, Dr. Guillerez and his team will fabricate, evaluate and optimize the all plastic solar cells. Overall, this three-year project will involve a financial support of 311 000$ from NSERC and 317 840 € from ANR. At the end of this project, new air stable n-type conjugated polymers should replace the widely used fullerene derivatives as electron-acceptor component in organic photovoltaic devices and lead to all-plastic solar cells with high power conversion efficiency.

Project coordination

Stéphane GUILLEREZ (COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES - CENTRE DE GRENOBLE) – stephane.guillerez@cea.fr

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.

Partner

PCAS PRODUITS CHIMIQUES AUXILIAIRES ET DE SYNTHESE
CEA/LITEN COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES - CENTRE DE GRENOBLE

Help of the ANR 429,200 euros
Beginning and duration of the scientific project: - 36 Months

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