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| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
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Vardeny, Zeev Valentine; Ehrenfreund, Eitan A. | Comment on "Yield of singlet excitons in organic light-emitting devices: a double modulation photoluminescence-detected magnetic resonance study" | In a recent Letter [1] Lee et al. studied the spin 1/2 photoluminescence-detected magnetic resonance (PLDMR) of a soluble derivative of poly-phenylene vinylene [MEH-PPV] using a double modulation scheme, where both the laser excitation intensity and the microwave power were modulated at ?ex and ?... | Singlet excitons; PLDMR; Poly-phenylene vinylene; MEH-PPV; Quenching; Spin dependent recombination; OLED | 2006 |
| 2 |
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Vardeny, Zeev Valentine | Cylindrical micolasers and light emitting devices from conducting polymers | Substantially improved, photopumped polymer lasers are demonstrated using microrings and microdisks of various diameters D ranging from 5 to 200 mm. Various cavity-dependent laser modes were observed, which for D,10 mm were dominated by a single longitudinal mode with linewidth of less than 1 Å. Th... | Cylindrical micolasers; OLED; Photopumped polymer lasers; Microrings; Microdisks; Microlasers | 1998 |
| 3 |
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Vardeny, Zeev Valentine | Efficiency enhancement of an organic light-emitting diode with a cathode forming two-dimensional periodic hole array | We fabricated an organic light-emitting diode using a ∏-conjugated polymer emissive layer sandwiched between two semitransparent electrodes: an optically thin gold film anode, whereas the cathode was in the form of an optically thick aluminum (Al) film with patterned periodic subwavelength two-dim... | pi-conjugated polymers; Organic light-emitting diode; OLED | 2005 |
| 4 |
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Vardeny, Zeev Valentine | Spin and magnetic field effects in organic semiconductor devices | The authors describe three spin and magnetic field effects in organic semiconductor devices: First, injection, transport and detection of spin-polarised carriers using an organic semiconductor as the spacer layer in a spin-valve structure, yielding low-temperature giant magnetoresistance effects as... | Spin effects; Magnetic field effects; MR; OLED; Organic light-emitting diode; Spin-polarised carriers; Spin-dependent exciton formation; Electroluminescent efficiency; pi-conjugated organic semicondutors; OSEC | 2005 |
| 5 |
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Vardeny, Zeev Valentine; Ehrenfreund, Eitan A. | Spin-dependent kinetics of polaron pairs in organic light-emitting diodes studied by electroluminescence detected magnetic resonance dynamics | We describe a method for characterizing the spin-dependent kinetics of polaron pairs (PP) in polymer organic light-emitting diodes (OLEDs) made from a derivative of poly(phenylene-vinylene), using the dynamic response of spin- 1/2 electroluminescence detected magnetic resonance (ELDMR) compared wit... | Spin-dependent kinetics; Polaron pairs; Organic light-emitting diodes; OLED; ELDMR; CDMR; Interchain excitations; pi-conjugated polymers | 2008-11 |
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