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Organic Photonics and Photovoltaics

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Efficiency enhancement of P3HT:PCBM solar cells containing scattering Zn-Al hydrotalcite nanoparticles in the PEDOT:PSS layer

Margherita Bolognesi
  • Laboratory MIST E-R, Via P. Gobetti, 101 - Bologna I-40129, Italy
/ Marta Tessarolo
  • Consiglio Nazionale delle Ricerche, Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN),Via P. Gobetti, 101 - Bologna I-40129, Italy
/ Tamara Posati
  • Laboratory MIST E-R, Via P. Gobetti, 101 - Bologna I-40129, Italy
  • Email:
/ Morena Nocchetti
  • Dipartimento di Chimica and Centro di Eccellenza Materiali Innovativi Nanostrutturati (CEMIN), Università di Perugia, Via Elce di Sotto 10, 06123 Perugia, Italy
/ Valentina Benfenati
  • Consiglio Nazionale delle Ricerche, Istituto per la Sintesi Organica e la Fotoreattività (CNR-ISOF) Via P. Gobetti, 101 - Bologna I-40129, Italy
/ Mirko Seri
  • Consiglio Nazionale delle Ricerche, Istituto per la Sintesi Organica e la Fotoreattività (CNR-ISOF) Via P. Gobetti, 101 - Bologna I-40129, Italy
  • Email:
/ Giampiero Ruani
  • Consiglio Nazionale delle Ricerche, Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN),Via P. Gobetti, 101 - Bologna I-40129, Italy
  • Email:
/ Michele Muccini
  • Consiglio Nazionale delle Ricerche, Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN),Via P. Gobetti, 101 - Bologna I-40129, Italy
Published Online: 2013-06-03 | DOI: https://doi.org/10.2478/oph-2013-0001


In this article we report on a new hybrid (organic-inorganic) composite material based on hydrophilic, electrically inert and semi-transparent hydrotalcite (HT) nanoparticles and a pHneutral formulation of PEDOT:PSS. The application of this composite material as electrically and optically active buffer layer in P3HT:PC61BM bulk heterojunction (BHJ) solar cells is reported. Two different synthetic routes are explored to obtain HTs having discoid shape, with a diameter of around 150- 200 nm and a thickness of ~20 nm, to be easily embedded in ~50 nm thick PEDOT:PSS films. The good affinity between HTs and the sulfonate groups of the PEDOT:PSS allows to obtain homogeneous HTs/PEDOT:PSS films, for HT concentrations of 0.25% and 0.50% by weight (vs. PEDOT:PSS). At these particle loads the electrical and morphological features of doped and undoped PEDOT:PSS films are nearly identical, while providing a significant effect on the visible light scattering properties of the composite films. We demonstrate ~12% improvement in power conversion efficiency (PCE) for P3HT:PC61BM solar cells incorporating HTs in the PEDOT: PSS layer, which mainly originates from increased shortcircuit current densities (JSC).

Keywords: composite film; hydrotalcite; light scattering; bulkheterojunction OPV; PEDOT:PSS

PACS: 78.66.Sq; 82.70.Uv; 78.35.+c; 81.07.Pr; 88.40.jr

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About the article

Received: 2013-02-20

Accepted: 2013-04-24

Published Online: 2013-06-03

Citation Information: Organic Photonics and Photovoltaics, ISSN (Online) 2299-3177, DOI: https://doi.org/10.2478/oph-2013-0001. Export Citation

©2013 Versita Sp. z o.o.. This content is open access.

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