Two-in-one: cathode modification and improved solar cell blend stability through addition of modified fullerenes
Journal article, 2016

The synthesis of dual purpose modified fullerenes with pyridine-as well as amine-functional groups is reported. Addition of these fullerenes to a polymer : fullerene bulk-heterojunction blend based on a thiophene-quinoxaline donor polymer is found to modify the active layer/cathode interface of inverted solar cells (glass/ITO/active layer/MoO3/Al). In particular the open-circuit voltage of devices is increased from 0.1 V to about 0.7 V, which results in a drastic rise in photovoltaic performance with a power conversion efficiency of up to 3%. At the same time, presence of the functionalised fullerene additives prevents the detrimental formation of micrometre-sized fullerene crystals upon annealing at 140 degrees C. As a result, the device performance is retained, which promises significantly increased thermal stability of the bulk-heterojunction blend nanostructure.

Author

Zandra George

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Y. X. Xia

Linköping University

A. Sharma

University of South Australia

Camilla Lindqvist

Karlstad University

G. Andersson

Flinders University

Olle Inganäs

Linköping University

E. Moons

Karlstad University

Christian Müller

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Mats Andersson

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Journal of Materials Chemistry A

20507488 (ISSN) 20507496 (eISSN)

Vol. 4 7 2663-2669

Subject Categories

Materials Engineering

Chemical Sciences

DOI

10.1039/c5ta06420a

More information

Latest update

5/23/2018