研究目的
Investigating the effects of a σ-hole containing volatile solid additive on the performance of organic solar cells.
研究成果
The introduction of a σ-hole containing volatile solid additive A3 significantly enhances the performance of organic solar cells by improving charge transport and reducing recombination, achieving a champion PCE of 16.5%. The study highlights the potential of σ-hole interactions in optimizing OSC performance and suggests the exploration of other σ-hole containing additives for further advancements.
研究不足
The study focused on one σ-hole containing small molecule, A3, and suggests exploring other σ-hole containing additives for further improvements.
1：Experimental Design and Method Selection:
The study employed a conventional device structure of ITO/PEDOT:PSS/photoactive layer/Phen-NaDPO/Ag. The σ-hole containing additive A3 was introduced into the PM6:Y6 based OSCs to modulate donor/acceptor phase separation.
2：Sample Selection and Data Sources:
The photoactive layer consisted of polymer donor PM6 and small molecular acceptor Y6, with A3 as the additive.
3：List of Experimental Equipment and Materials:
AFM for morphology characterization, GIWAXS for crystalline ordering, FTIR and UV-vis for molecule interaction studies, and SCLC for charge carrier mobilities.
4：Experimental Procedures and Operational Workflow:
The OSCs were fabricated with and without A3 additive, followed by thermal annealing to remove the additive. The devices were then characterized for performance and stability.
5：Data Analysis Methods:
The performance of OSCs was evaluated through J-V measurements, EQE spectra, and stability tests. Morphology and molecular interactions were analyzed through AFM, GIWAXS, FTIR, and UV-vis measurements.
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1,4-diiodotetrafluorobenzene
A3
Volatile solid additive for modulating donor/acceptor phase separation in organic solar cells.
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PM6
Polymer donor in the photoactive layer of organic solar cells.
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Y6
Non-fullerene small molecular acceptor in the photoactive layer of organic solar cells.
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PEDOT:PSS
Hole transport layer in organic solar cells.
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Phen-NaDPO
Electron transport layer in organic solar cells.
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Ag
Electrode material in organic solar cells.
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ITO
Transparent conductive electrode in organic solar cells.
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