This title appears in the Scientific Report :
2022
Please use the identifier:
http://dx.doi.org/10.1002/ijch.202100068 in citations.
Please use the identifier: http://hdl.handle.net/2128/31708 in citations.
Quantitative Analysis of Charge Dissociation by Selectively Characterizing Exciton Splitting Efficiencies in Single Component Materials
Quantitative Analysis of Charge Dissociation by Selectively Characterizing Exciton Splitting Efficiencies in Single Component Materials
Exciton dissociation between donor and acceptor is the decisive process to determine the photovoltaic performance of organic solar cells (OSCs). The rather fast dynamics of photo-induced charge generation in well-optimized bulk heterojunction (BHJ) composites complicate the quantitative analysis of...
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Personal Name(s): | He, Yakun |
---|---|
Hanisch, Benedict / Osvet, Andres / Lüer, Larry / Aubele, Anna / Bäuerle, Peter / Li, Weiwei / Li, Ning (Corresponding author) / Brabec, Christoph (Corresponding author) | |
Contributing Institute: |
Helmholtz-Institut Erlangen-Nürnberg Erneuerbare Energien; IEK-11 |
Published in: | Israel journal of chemistry, 62 (2022) 7-8, S. 202100068 |
Imprint: |
Weinheim
Wiley-VCH
2022
|
DOI: |
10.1002/ijch.202100068 |
Document Type: |
Journal Article |
Research Program: |
Modules, stability, performance and specific applications Cell Design and Development Materials and Interfaces |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/31708 in citations.
Exciton dissociation between donor and acceptor is the decisive process to determine the photovoltaic performance of organic solar cells (OSCs). The rather fast dynamics of photo-induced charge generation in well-optimized bulk heterojunction (BHJ) composites complicate the quantitative analysis of the charge generation efficiency for donor and acceptor units. Herein, we report time-resolved photoluminescence (TRPL) investigations and demonstrate their potential as a quantitative and contactless characterization technique allowing to separately determine the exciton splitting efficiency of donor and acceptor moieties in selected single component materials. We demonstrate that the exciton splitting efficiency for donor or acceptor moieties can be separately adjusted in these materials by post-treatment, while the corresponding BHJ composites undergo excessive phase separation upon external stress. By relating the separate exciton splitting efficiencies to their photovoltaic performance, the limiting factor in corresponding OSCs, either charge generation or recombination, is identified. |