Designing ternary blend bulk heterojunction solar cells with reduced carrier recombination and a fill factor of 77%

Journal article


Publication Details

Author(s): Gasparini N, Jiao X, Heumüller T, Baran D, Matt G, Fladischer S, Spiecker E, Ade H, Brabec C, Ameri T
Journal: Nature energy
Publisher: NATURE PUBLISHING GROUP
Publication year: 2016
Volume: 1
ISSN: 2058-7546


Abstract


In recent years the concept of ternary blend bulk heterojunction (BHJ) solar cells based on organic semiconductors has been widely used to achieve a better match to the solar irradiance spectrum, and power conversion effciencies beyond 10% have been reported. However, the fill factor of organic solar cells is still limited by the competition between recombination and extraction of free charges. Here, we design advanced material composites leading to a high fill factor of 77% in ternary blends, thus demonstrating how the recombination thresholds can be overcome. Extending beyond the typical sensitization concept, we add a highly ordered polymer that, in addition to enhanced absorption, overcomes limits predicted by classical recombination models. An effective charge transfer from the disordered host system onto the highly ordered sensitizer effectively avoids traps of the host matrix and features an almost ideal recombination behaviour.



FAU Authors / FAU Editors

Ameri, Tayebeh Dr.
Institute Materials for Electronics and Energy Technology (i-MEET)
Brabec, Christoph Prof. Dr.
Institute Materials for Electronics and Energy Technology (i-MEET)
Rechberger, Stefanie Dr.
Institute Materials for Electronics and Energy Technology (i-MEET)
Gasparini, Nicola
Institute Materials for Electronics and Energy Technology (i-MEET)
Heumüller, Thomas Dr.-Ing.
Institute Materials for Electronics and Energy Technology (i-MEET)
Matt, Gebhard Dr.
Institute Materials for Electronics and Energy Technology (i-MEET)
Spiecker, Erdmann Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)


Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)


External institutions with authors

Imperial College London / The Imperial College of Science, Technology and Medicine
North Carolina State University


Research Fields

B Nanoelectronic Materials
Exzellenz-Cluster Engineering of Advanced Materials
A2 Nanoanalysis and Microscopy
Exzellenz-Cluster Engineering of Advanced Materials


How to cite

APA:
Gasparini, N., Jiao, X., Heumüller, T., Baran, D., Matt, G., Fladischer, S.,... Ameri, T. (2016). Designing ternary blend bulk heterojunction solar cells with reduced carrier recombination and a fill factor of 77%. Nature energy, 1. https://dx.doi.org/10.1038/NENERGY.2016.118

MLA:
Gasparini, Nicola, et al. "Designing ternary blend bulk heterojunction solar cells with reduced carrier recombination and a fill factor of 77%." Nature energy 1 (2016).

BibTeX: 

Last updated on 2019-29-05 at 09:20