Suppressing the Surface Recombination and Tuning the Open-Circuit Voltage of Polymer/Fullerene Solar Cells by Implementing an Aggregative Ternary Compound

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Galli D, Gasparini N, Forster M, Eckert A, Widling C, Killian M, Avgeropoulos A, Gregoriou VG, Scherf U, Chochos CL, Brabec C, Ameri T
Zeitschrift: ACS Applied Materials and Interfaces
Verlag: American Chemical Society
Jahr der Veröffentlichung: 2018
Band: 10
Heftnummer: 34
Seitenbereich: 28803-28811
ISSN: 1944-8244
eISSN: 1944-8252
Sprache: Englisch


Abstract

In this work, we present a novel small molecule based on
dithienylthienothiadiazole units (named SM1) acting as an efficient
component in ternary blend organic solar cells to modify the hole
extraction at the interface. Our findings show that the SM1 suppresses
the surface recombination and enhances the open-circuit voltage (Voc). By introducing SM1 in a host system composed of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM), we obtained Voc
values of up to 0.75 V and fill factors larger than 70% for the ternary
blends. As a consequence, the power conversion efficiency is improved
by about 30% compared to P3HT:PCBM binary devices. Interestingly,
external quantum efficiency and absorption spectra in the near-infrared
region do not show any contribution of SM1 in dried films. Instead, the
addition of the small molecule improves the Voc by
reducing the surface recombination losses. To shed light on the
recombination processes, we carried out Fourier-transform photocurrent
spectroscopy and impedance spectroscopy measurements. This work shows
that the ternary concept can also have functionalities other than
photosensitization and can even act as a morphology-directing agent or
an interface modifier.


FAU-Autoren / FAU-Herausgeber

Ameri, Tayebeh Dr.
Lehrstuhl für Werkstoffwissenschaften (Materialien der Elektronik und der Energietechnologie)
Brabec, Christoph Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Materialien der Elektronik und der Energietechnologie)
Galli, Diana
Lehrstuhl für Werkstoffwissenschaften (Materialien der Elektronik und der Energietechnologie)
Gasparini, Nicola
Lehrstuhl für Werkstoffwissenschaften (Materialien der Elektronik und der Energietechnologie)
Killian, Manuela Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik)


Autor(en) der externen Einrichtung(en)
Advent Technologies SA
Bergische Universität Wuppertal
University of Ioannina / Πανεπιστήμιο Ιωαννίνων


Zitierweisen

APA:
Galli, D., Gasparini, N., Forster, M., Eckert, A., Widling, C., Killian, M.,... Ameri, T. (2018). Suppressing the Surface Recombination and Tuning the Open-Circuit Voltage of Polymer/Fullerene Solar Cells by Implementing an Aggregative Ternary Compound. ACS Applied Materials and Interfaces, 10(34), 28803-28811. https://dx.doi.org/10.1021/acsami.8b09174

MLA:
Galli, Diana, et al. "Suppressing the Surface Recombination and Tuning the Open-Circuit Voltage of Polymer/Fullerene Solar Cells by Implementing an Aggregative Ternary Compound." ACS Applied Materials and Interfaces 10.34 (2018): 28803-28811.

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Zuletzt aktualisiert 2019-15-05 um 10:34