Creator | Title | Description | Subject | Date | ||
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1 |
![]() | Vardeny, Zeev Valentine; Ehrenfreund, Eitan A. | Photogeneration of confined soliton pairs (bipolarons) in polythiophene | From photoinduced absorption and light-induced electron-spin resonance, we demonstrate that the dominant photocarriers generated in polythiophene with excitation above the energy gap (Eg) are charged bipolarons (spin 0). The observation of bipolarons (B2± ) rather than polarons (Pf ) as the dominan... | Photoinduced absorption; Photocarriers; Bipolarons; Photoexcitation | 1986-02 |
2 |
![]() | 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 |