研究目的
Investigating the chemical interaction between Diiodooctane and PEDOT-PSS electrode for metal electrode-free non-fullerene organic solar cells.
研究成果
The study demonstrates that DIO induces chemical reduction of PEDOT:PSS, leading to decreased work function and poor device performance. By inserting an ultrathin active layer without DIO, the detrimental interaction is circumvented, achieving a PCE of 10.1% for metal electrode-free non-fullerene organic solar cells. The findings emphasize the need to consider the chemical reactivity of additives in printed solar cells.
研究不足
The study highlights the detrimental effect of DIO on the chemical reduction of PEDOT:PSS, which lowers its work function and inhibits efficient hole collection. The strategy to insert an ultrathin active layer without DIO improves device performance but may introduce complexity in the fabrication process.
1：Experimental Design and Method Selection:
The study involves the fabrication of metal electrode-free organic solar cells with a printable PEDOT:PSS top electrode and investigates the chemical interaction between PEDOT:PSS and DIO in the active layer.
2：Sample Selection and Data Sources:
The active layer consists of PM6:IT-4F with DIO as an additive.
3：List of Experimental Equipment and Materials:
Materials include ITO-coated glass substrates, ZnO precursor, PM6 and IT-4F, PEDOT:PSS (PH1000), DIO, and HI. Equipment includes a UV-vis-NIR Spectrophotometer, Keithley 2400 source, Newport solar simulator, Kelvin Probe, and UPS measurement system.
4：Experimental Procedures and Operational Workflow:
The device fabrication involves cleaning ITO substrates, spin-coating ZnO and active layers, and transfer printing PEDOT:PSS electrode. The interaction between DIO and PEDOT:PSS is analyzed through absorbance measurements and work function analysis.
5：Data Analysis Methods:
The performance of solar cells is evaluated through J-V characteristics, and the chemical interaction is confirmed through absorbance spectra and UPS measurements.
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PEDOT:PSS
PH1000
Hareaus
Used as the printable top electrode.
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UV-vis-NIR Spectrophotometer
UV-3600
Shimadzu
Used for absorbance measurements of the films.
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Ultraviolet photoemission spectroscopy
ESCALAB 250
Thermo-VG Scientific
Used for work function measurement.
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ITO-coated glass substrates
SCG Holding Co., Ltd
Used as the substrate for the solar cells.
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ZnO precursor
Aldrich
Used for the electron transport layer.
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PM6
Solarmer Materials
Used as the donor material in the active layer.
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IT-4F
Solarmer Materials
Used as the acceptor material in the active layer.
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1,8-Dioodooctane
Aldrich
Used as an additive in the active layer.
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Keithley 2400 source
Keithley
Used for current density-voltage characteristics measurement.
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Newport solar simulator
Newport
Used for illumination during device testing.
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Kelvin Probe
KP-020
KP Technology
Used for work function measurement.
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