Unraveling the Charge-Carrier Dynamics from the Femtosecond to the Microsecond Time Scale in Double-Cable Polymer-Based Single-Component Organic Solar Cells
He Y, Wang B, Lüer L, Feng G, Osvet A, Heumüller T, Liu C, Li W, Guldi DM, Li N, Brabec C (2021)
Publication Type: Journal article
Publication year: 2021
Journal
Abstract
Single-component organic solar cells (SCOSCs) have witnessed great improvement during the last few years with the champion efficiency jumping from the previous 2-3% to currently 6-11% for the representative material classes. However, the photophysics in many of these materials has not been sufficiently investigated, lacking essential information regarding charge-carrier dynamics as a function of microstructure, which is highly demanded for a better understanding and potential guidance for further improvements. In this work, for the first time, the charge-carrier dynamics of a representative double-cable polymer, which achieves efficiencies of over 6% as an active layer in SCOSCs, is investigated across seven orders of magnitude in time scale, from fs-ps charge generation to ns-mu s charge recombination processes. Specific emphasis is placed on understanding the impact of thermal post-treatment on the charge dissociation and recombination dynamics. Annealing the photoactive layer at 230 degrees C results in the highest photovoltaic performance because of efficient charge generation in parallel to suppressed recombination. This work intends to present a complete picture of the charge-carrier dynamics in SCOSCs using the representative double-cable polymer PBDBPBI-Cl.
Authors with CRIS profile
Yakun He
Institute Materials for Electronics and Energy Technology (i-MEET)
Bingzhe Wang
Lehrstuhl für Physikalische Chemie I
Larry Lüer
Institute Materials for Electronics and Energy Technology (i-MEET)
Andres Osvet
Institute Materials for Electronics and Energy Technology (i-MEET)
Thomas Heumüller
Institute Materials for Electronics and Energy Technology (i-MEET)
Chao Liu
Institute Materials for Electronics and Energy Technology (i-MEET)
Dirk Michael Guldi
Lehrstuhl für Physikalische Chemie I
Ning Li
Institute Materials for Electronics and Energy Technology (i-MEET)
Christoph Brabec
Institute Materials for Electronics and Energy Technology (i-MEET)
Involved external institutions
China (CN)How to cite
APA:
He, Y., Wang, B., Lüer, L., Feng, G., Osvet, A., Heumüller, T.,... Brabec, C. (2021). Unraveling the Charge-Carrier Dynamics from the Femtosecond to the Microsecond Time Scale in Double-Cable Polymer-Based Single-Component Organic Solar Cells. Advanced Energy Materials. https://dx.doi.org/10.1002/aenm.202103406
MLA:
He, Yakun, et al. "Unraveling the Charge-Carrier Dynamics from the Femtosecond to the Microsecond Time Scale in Double-Cable Polymer-Based Single-Component Organic Solar Cells." Advanced Energy Materials (2021).
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