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Short-circuit exciton current

The short-circuit exciton current density at the interface x = 0 is... [Pg.258]

Fig. 5.5. Luminescence quenching (bullets, right hand, axis) and short-circuit current Ac (black squares, left hand axis) vs. molar fullerene concentration in a bulk hetero junction composite. The different onsets for percolation for the two phenomena (exciton diffusion versus ambipolar carrier transport) can be clearly seen... Fig. 5.5. Luminescence quenching (bullets, right hand, axis) and short-circuit current Ac (black squares, left hand axis) vs. molar fullerene concentration in a bulk hetero junction composite. The different onsets for percolation for the two phenomena (exciton diffusion versus ambipolar carrier transport) can be clearly seen...
Figure 2.1 The key factors rJetermining the power conversion efficiency (17) of bulk heterojunction PSCs, together with parameters of solar cell device performance short-circuit current densityJ c, open-circuit voltage Voc. and fill factor FF. All three basic processes, light absorption (characterized by efficiency r/ ), exciton dissociation (j/ed). and transport and... Figure 2.1 The key factors rJetermining the power conversion efficiency (17) of bulk heterojunction PSCs, together with parameters of solar cell device performance short-circuit current densityJ c, open-circuit voltage Voc. and fill factor FF. All three basic processes, light absorption (characterized by efficiency r/ ), exciton dissociation (j/ed). and transport and...
Fig. 6 Left Two-dimensional slices through representative structures with diffuse interfaces (Cl), pure domains with diffuse interfaces (DII) and pure domains with abrupt interfaces (SII). Right KMC predictions of short-circuit current density (top), exciton dissociation efficiency (middle), and carrier collection efficiency (bottom) for the Cl (circles), DO (triangles), and SII (squares) morphologies. Adapted from [18] by permission of The Royal Society of Chemistry... Fig. 6 Left Two-dimensional slices through representative structures with diffuse interfaces (Cl), pure domains with diffuse interfaces (DII) and pure domains with abrupt interfaces (SII). Right KMC predictions of short-circuit current density (top), exciton dissociation efficiency (middle), and carrier collection efficiency (bottom) for the Cl (circles), DO (triangles), and SII (squares) morphologies. Adapted from [18] by permission of The Royal Society of Chemistry...
The author with co-workers [39] has investigated systems with the structures Al/Cso/PANI+CdS/ITO and Al/Cgo/PPV-l-CdInS/ITO. Most worthy of note are the dependencies of the short circuit current and the open circuit voltage on the nanoparticles concentration (Fig. 21). Since the fullerene molecule acts as a strong electron acceptor, excitons generated both in the polymer matrix and in the CdS particles are decomposed, electrons are accepted by the Ceo layer and the holes are transported to the anode through the polymer. Once the concentration of the nanoparticles exceeds the percolation threshold value, the system becomes short contacted, since the electrons can pass from the anode to the cathode through the barrier-free connected network of CdS clusters this latter fact leads to the disappearance of the photovoltaic effect, as illustrated in Fig. 21b. The increase in the photocurrent and the open circuit... [Pg.193]


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Exciton

Exciton/excitonic

Excitons

Short circuit currents

Short-circuiting

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