TO
1 - 25 of 4
| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 1 |
 | Vardeny, Zeev Valentine | Mechanism for photogeneration of charge carriers in polyacetylene | In light of new experimental observations, a mechanism for the photogeneration of charge carriers in trans-polyacetylene is presented. By way of introduction, we discuss the qualitative changes in the picture of charged-soliton photogeneration that are expected due to the inclusion of electron corre... | Photogeneration; Charge carriers; Photocarriers | 1984-07 |
| 2 |
 | Vardeny, Zeev Valentine | Photocarrier dynamics in compensated hydrogenated amorphous silicon | The photocarrier dynamics in compensated a-Si:H is studied using the time-dependent photomodulation technique in the subpicosecond-to-millisecond time range. We find that photocarriers are quickly trapped in shallow impurity levels for t < 10 psec, similar to the behavior in singly doped materials... | Photocarriers; a-Si:H; Amorphous silicon; Fast trapping | 1986-03 |
| 3 |
 | 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 |
| 4 |
 | Vardeny, Zeev Valentine | Picosecond trapping of photocarriers in amorphous silicon | Trapping of photoexcited carriers in the picosecond and subnanosecond time domains was studied by measuring the decay of photoinduced absorption (PA) in a-Si, a-Si:F, a-Si:H, and a-Si:H:F. We found that when the midgap density of states decreases, both the trapping time and its temperature dependenc... | Photocarriers; Amorphous silicon; Picosecond trapping; Photoinduced absorption | 1983 |
1 - 25 of 4