Partner: Elisabetta Salatelli

University of Bologna (IT)

Ostatnie publikacje
1.Lanzi M., Salatelli E., Giorgini L., Marinelli M., Pierini F., Effect of the incorporation of an Ag nanoparticle interlayer on the photovoltaic performance of green bulk heterojunction water-soluble polythiophene solar cells, POLYMER, ISSN: 0032-3861, DOI: 10.1016/j.polymer.2018.07.012, Vol.149, pp.273-285, 2018

Streszczenie:

Two water-soluble regioregular poly(3-alkylthiophene)s, incorporating aminic groups at the end of the side chains, have been synthesized using a post-polymerization functionalization procedure on a ω-bromine substituted polyalkylthiophene. The high solubility of the obtained polymers in water allowed for the preparation of “green” bulk heterojunction solar cells which reached a power conversion efficiency of 4.85% when PC61BM was used as electron-acceptor material. Improved optical absorption and photocurrent have been obtained by interposing a layer of Ag nanoparticles between the buffer and the photoactive layer, leading to a final power conversion efficiency of 5.51%.

Słowa kluczowe:

Water-soluble polythiophene, Bulk heterojunction solar cell, Organic photovoltaic

Afiliacje autorów:

Lanzi M.-University of Bologna (IT)
Salatelli E.-University of Bologna (IT)
Giorgini L.-University of Bologna (IT)
Marinelli M.-University of Bologna (IT)
Pierini F.-IPPT PAN
40p.
2.Lanzi M., Salatelli E., Giorgini L., Mucci A., Pierini F., Di-Nicola F.P., Water-soluble polythiophenes as efficient charge-transport layers for the improvement of photovoltaic performance in bulk heterojunction polymeric solar cells, EUROPEAN POLYMER JOURNAL, ISSN: 0014-3057, DOI: 10.1016/j.eurpolymj.2017.10.032, Vol.97, pp.378-388, 2017

Streszczenie:

Water-soluble regioregular poly{3-[(6-sodium sulfonate)hexyl]thiophene} (PT6S) and poly{3-[(6-trimethylammoniumbromide)hexyl]thiophene} (PT6N) have been synthesized and employed both as photoactive layers for the assembling of “green” bulk-heterojunction organic solar cells and as charge-collection layers in a cell with “classic” architecture. While the photovoltaic performances obtained with the two aforementioned polymers were lower than the reference cell, their latter use allowed to notably increase the inherent J-V properties, leading to a considerable enhancement in the overall photovoltaic output. The power conversion efficiency of the optimized multilayer BHJ solar cell reached 4.78%, revealing a higher efficiency than the reference cell (3.63%).

Słowa kluczowe:

Water-soluble polymer, Polythiophene derivative, Bulk heterojunction, Organic photovoltaic, Interfacial layer

Afiliacje autorów:

Lanzi M.-University of Bologna (IT)
Salatelli E.-University of Bologna (IT)
Giorgini L.-University of Bologna (IT)
Mucci A.-University of Modena (IT)
Pierini F.-IPPT PAN
Di-Nicola F.P.-University of Bologna (IT)
35p.
3.Lanzi M., Salatelli E., Di-Nicola F.P., Zuppiroli L., Pierini F., A new photocrosslinkable oligothiophene for organic solar cells with enhanced stability, MATERIALS CHEMISTRY AND PHYSICS, ISSN: 0254-0584, DOI: 10.1016/j.matchemphys.2016.10.034, Vol.186, pp.98-107, 2017

Streszczenie:

A novel thiophenic tetramer containing a cinnamate group in the side chain with a functionalization degree of 50% is reported. The tetramer was obtained by means of a simple and straightforward procedure involving the functionalization of a p-methoxyphenoxy substituted thiophenic precursor, which led to a soluble product with a good yield. The oligomer was fully characterized from a structural and chemical point of view and employed for the fabrication of small molecule organic solar cells exploiting the bulk heterojunction (BHJ) architecture. The presence of an UV-light sensitive group in the tetramer allowed the photocrosslinking of tetramer/PCBM blends, giving high values of photocurrent and conversion efficiency for the exposed samples. Moreover, the UV-treated devices showed improved stability, even upon heating for three days at 130 °C, thus confirming that photocrosslinking can strongly reduce phase segregation under severe operational conditions.

Słowa kluczowe:

Electronic materials, Polymers, Fullerenes, Nanostructures, Electrical characterization, Semiconductors

Afiliacje autorów:

Lanzi M.-University of Bologna (IT)
Salatelli E.-University of Bologna (IT)
Di-Nicola F.P.-University of Bologna (IT)
Zuppiroli L.-University of Bologna (IT)
Pierini F.-IPPT PAN
30p.