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| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 1 |
 | Vardeny, Zeev Valentine | Absorption studies of charged excitations in α-sexithiophene | We present photoexcitation studies of vacuum deposited neutral films of α,ω-substituted sexithiophene (α-6T) using photoinduced absorption (PA) and PAdetected magnetic resonance spectroscopy (PADMR). We find evidence for photoinduced polarons having spin 1/2, with two absorption bands at 0.80... | alpha- sexithiophene; Charged excitations; Photoexcitation; Photoinduced absorption | 1996 |
| 2 |
 | Vardeny, Zeev Valentine | Photogeneration action spectroscopy of neutral and charged excitations in films of ladder-type poly(para-phenylene) | The photogeneration quantum efficiency action spectra of long-lived neutral and charged excitations in films of a ladder-type poly(para-phenylene) were measured. We found that both triplet and polaron action spectra show, in addition to a step function increase at the optical gap, a monotonic rise a... | Photogeneration; Neutral excitations; Charged excitations; pi-conjugated polymers; Transient spectroscopy | 1999-04 |
| 3 |
 | Vardeny, Zeev Valentine | Photogeneration and recombination processes of neutral and charged excitations in films of a ladder-type poly(para-phenylene) | We introduce a version of the cw photomodulation technique, measured far from the steady state, for obtaining the quantum efficiency, η, of long-lived photoexcitations in p-conjugated polymers. We apply this technique to films of a ladder-type poly(para-phenylene) [mLPPP] for studying the photoge... | Photogeneration; Recombination process; Neutral excitations; Charged excitations; Ladder-type poly(para-phenylene) | 1999-08 |
| 4 |
 | Vardeny, Zeev Valentine | Studies of charged excitations in ∏-conjugated oligomers and polymers by optical modulation | We have studied photogenerated charged excitations in sexithiophene and a variety of p-conjugated polymers by photoinduced absorption (PA) and PA-detected magnetic resonance. We found distinct spin signatures for polarons and bipolarons, which enabled us to separate their contributions to the PA spe... | Pi-conjugated oligomers; Pi-conjugated polymers; Charged excitations; Optical modulation; Spin signatures; Bipolarons; Photoexcitation | 1996-08 |
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