Issue 10, 2012
From the journal:

Physical Chemistry Chemical Physics

Directed electron transfer in Langmuir–Schäfer layers of porphyrin–fullerene and phthalocyanine–fullerene dyads in inverted organic solar cells†

A. Tolkki,*a   K. Kaunisto,a   A. Efimov,a   H. Kivistö,a   L. Storbacka,a   R. Savikoski,a   K. Huttunen,a   S. Lehtimäkia  and  H. Lemmetyinena  

* Corresponding authors

a Department of Chemistry and Bioengineering, Tampere University of Technology, P.O. Box 541, FI-33101, Tampere, Finland
E-mail: antti.tolkki@tut.fi

Abstract

In this study double linked porphyrin–fullerene and phthalocyanine–fullerene dyads and a single linked phthalocyanine–fullerene dyad were studied as components in inverted organic solar cells (OSCs) equipped with the well known P3HT:PCBM bulk heterojunction as the photoactive layer. The dyad monolayers were deposited onto a surface of P3HT:PCBM by using the Langmuir–Schäfer method, therefore forming oriented monolayers in which the electron donor (D) and the acceptor (A) exist as a close proximity pair in a 1 ∶ 1 molar ratio. As a result of this structure short circuit current density (Jsc), open circuit voltage (Voc), and power conversion efficiency (η) increased, while the fill factor (FF) remained the same. The devices which contained dyads with double linkage produced higher efficiencies than the one with a single linked dyad. This result can be explained in terms of molecular orientation. It was also verified that the prepared OSC devices have promising long term air stability.

Graphical abstract: Directed electron transfer in Langmuir–Schäfer layers of porphyrin–fullerene and phthalocyanine–fullerene dyads in inverted organic solar cells

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Article information

DOI
https://doi.org/10.1039/C2CP24022J
Article type
Paper
Submitted
05 Dec 2011
Accepted
13 Jan 2012
First published
16 Jan 2012

Phys. Chem. Chem. Phys., 2012,14, 3498-3504

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Directed electron transfer in Langmuir–Schäfer layers of porphyrin–fullerene and phthalocyanine–fullerene dyads in inverted organic solar cells

A. Tolkki, K. Kaunisto, A. Efimov, H. Kivistö, L. Storbacka, R. Savikoski, K. Huttunen, S. Lehtimäki and H. Lemmetyinen, Phys. Chem. Chem. Phys., 2012, 14, 3498 DOI: 10.1039/C2CP24022J

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