研究目的
To fabricate an efficient OLED illuminant with tunable spectra and intensity for smart lighting systems.
研究成果
The study demonstrates efficient and color-tunable IPE-OLEDs for smart lighting systems. The design allows utilizing different polarities and/or duty-cycles of AC driven signals to independently address the two units, enabling adjustment of color temperature and intensity. IPE-OLEDs-based smart lighting systems can realize human-centric lighting and warn workers of dangerous chemicals.
研究不足
The lifetime of IPE-OLEDs is determined by the blue unit, indicating a need for developing long lifetime blue devices. The shift of emission spectra with operation time is another issue in white OLEDs.
1：Experimental Design and Method Selection:
The study demonstrates efficient and color-tunable in-planar-electrodes OLEDs (IPE-OLEDs) for smart lighting applications. The working mechanism is carefully discussed to explain the advantages of this specific structure when compared with conventional OLEDs.
2：Sample Selection and Data Sources:
The devices were fabricated on glass substrates pre-coated with ITO, acting as transparent bottom IPE. Organic layers and metal were deposited sequentially by thermal evaporation technique.
3：List of Experimental Equipment and Materials:
Materials used include TCTA as hole transport layer, CBP, 26DCzPPy, PO-01, FirPic, Ir(MDQ)2(acac), and Ir(ppy)3 as EMLs, Bphen as ETL. Equipment includes Keithley 2400 Source Meter, Goniophotometric Measurement System (GP500), optical microscope, and Agilent B2902A.
4：2A. Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: Substrates were cleaned, dried, and treated in plasma cleaner. Organic layers and metal were deposited sequentially. The current density–voltage–luminance (J–V–L), CE–L–PE characteristics, and the EL spectra were measured.
5：Data Analysis Methods:
The performance of the devices was analyzed based on the measured J–V–L characteristics, CE–L–PE characteristics, and EL spectra.
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Agilent B2902A
B2902A
Agilent
Providing pulse waveforms with suitable frequency and voltages
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Ocean Optics Maya 2000-PRO Spectrometer
Maya 2000-PRO
Ocean Optics
Measuring the spectra under AC signals
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Keithley 2400 Source Meter
2400
Keithley
Measuring current density–voltage–luminance characteristics
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Goniophotometric Measurement System
GP500
Otsuka Electronics
Measuring EL spectra
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Optical Microscope
Obtaining microscopy image of substrate
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Inverted Fluorescence Microscope
Mshot M53
Micro-shot Technology
Obtaining EL microscopy images
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Risym MQ-4
MQ-4
Risym
Gas transducer for methane
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Risym MQ-7
MQ-7
Risym
Gas transducer for carbonic oxide
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