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In situ syntheses of semiconducting nanoparticles in conjugated polymer matrices and their application in photovoltaics.

100%

Rath T., Trimmel G.

Hybrid Materials

2015

vol. 1

issue 1

Hybrid solar cells based on conjugated polymers and inorganic semiconducting nanoparticles combine beneficial properties of organic and inorganic semiconductors and are, therefore, an exciting alternative to pure organic or inorganic solar cell technologies. Several approaches for the fabrication of hybrid solar cells are already elaborated and explored. In the last years routes have emerged, where the nanoparticles are prepared directly in the matrix of the conjugated polymer. Here, the conjugated polymer prevents the nanoparticles from excessive growth and thereby makes additional capping agents obsolete. This review focuses on in situ preparation methods of inorganic semiconducting nanoparticles in conjugated polymers in view of applications in hybrid solar cells. The details, advantages and disadvantages of the different in situ methods are critically examined and put in comparison to the classical route where pre-synthesized nanoparticles are used. Various key factors influencing the solar cell performance as well as future strategies for increasing the overall efficiency of hybrid solar cells prepared via in situ routes are discussed.

Functional Π-conjugated polymers based on maleimide for photovoltaic applications

88%

Gironda R., Miozzo L., Tondelier D., Chaigneau M., Ghabboun J., Faroun M., Papagni A., Salamone M. M., Ruffo R., Yassar A.

Organic Photonics and Photovoltaics

2013

vol. 1

56-66

A series of new bis-(2-thienyl) maleimide monomers have been synthesized and characterized. The bis-(2- thienyl)maleimide unit has been copolymerized with different aromatic comonomers. Stille coupling polymerizations under various conditions have been utilized. The copolymers were then characterized by size-exclusion chromatography and their optical and electronic properties were investigated by UV-Vis absorption spectroscopy and cyclic voltammetry. All maleimide based copolymers shared similar LUMO energy levels, which are largely determined by the acceptor moiety, and are close to that of PC61BM to be effective for charge dissociation. These low band gap polymers have been tested for photovoltaic applications and have shown moderate photovoltaic performance. Interesting results were obtained by adding the polymer to the P3HT:PC61BM mixture, as a third component. The ternary blend BHJ solar cells showed power conversion efficiencies of 35% exceeding those of the corresponding binary blends.

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1 Hybrid Materials

1 Organic Photonics and Photovoltaics

1 2014

1 2013

1 Chaigneau M.

1 Faroun M.

1 Ghabboun J.

1 Gironda R.

1 Miozzo L.

1 Papagni A.

1 Rath T.

1 Ruffo R.

1 Salamone M. M.

1 Tondelier D.

1 Trimmel G.

1 Yassar A.

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In situ syntheses of semiconducting nanoparticles in conjugated polymer matrices and their application in photovoltaics.

Functional Π-conjugated polymers based on maleimide for photovoltaic applications