研究目的
Demonstration of a 6 x 6 element matrix of alternating blue OLEDs and OPDs on a single flexible plastic substrate for compact and low-cost optical detection units for multiplex sensors.
研究成果
The study successfully demonstrated the monolithic integration of a matrix of OLEDs and OPDs on a flexible substrate, suitable for multiplex sensor applications. The devices showed potential for fluorescence sensing, though improvements in OPD design are needed to enhance fluorescence signal detection over absorption effects.
研究不足
The lifetime of the devices was short, necessitating encapsulation with glass to prevent degradation. The current system's absorption effects dominate over fluorescence effects, indicating a need for OPDs with narrowband absorption or integrated longpass filters.
1：Experimental Design and Method Selection:
The study involves the fabrication of OLEDs and OPDs on a flexible PET substrate using masked thermal evaporation. The design includes a matrix layout for fluorescence sensing.
2：Sample Selection and Data Sources:
The samples are fabricated on a 200 μm thick PET foil with ITO top layer. The data is collected from the fabricated devices' performance metrics.
3：List of Experimental Equipment and Materials:
Includes PET foil, ITO, PEDOT:PSS, NPB, DPVBi, BCzVBi, BPhen, LiF, Al, CuPc, C60, and Ru(dpp)2Cl3 for fluorescence testing.
4：Experimental Procedures and Operational Workflow:
The process involves UV lithography, wet etching, spin-coating, thermal evaporation, and encapsulation. Characterization includes I-V measurements, spectral analysis, and fluorescence detection.
5：Data Analysis Methods:
The analysis involves comparing the performance of devices on PET and glass substrates, evaluating spectral characteristics, and assessing fluorescence detection capabilities.
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PET foil
200 μm thick
EMI Tape Co., Thorlabs
Substrate for OLED and OPD fabrication
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ITO
20 nm
EMI Tape Co., Thorlabs
Transparent anode contact pads
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PEDOT:PSS
Sigma-Aldrich Chemie GmbH
Hole transport layer
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NPB
Hole transport layer in OLED
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DPVBi
Emission layer in OLED
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BCzVBi
Dopant in emission layer
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BPhen
Electron transport layer in OLED
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LiF
Part of cathode pads
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Al
Part of cathode pads
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CuPc
Electron donor layer in OPD
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C60
Electron acceptor layer in OPD
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Ru(dpp)2Cl3
Fluorophore for fluorescence testing
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