Photoreceptors dual-layer

Figure 3 Cross section of (a) mono- and (b) dual-layer photoreceptors.

Figure 5 A cross-section schematic of the dual-layer photoreceptor configuration. Transport layer thicknesses are typically 15 to 30 pm. Generation layer thicknesses are usually between 0.5 to 5.0 pm.

Pacansky et al. (1987) described the fabrication of dual-layer photoreceptors by radiation curing. The layers were coated with a polymerizable acrylate monomer or oligomer as the liquid component, then cured by a 175 kV electron beam or ultraviolet exposure. These methods were used for the preparation of generation layers containing bisazo and hydroxysquaraine pigments. 

Figure 16 Voltage versus the logarithm of exposure for a dual-layer aggregate photoreceptor.

Figure 1 The field dependence of the photogeneration efficiency of a dual-layer aggregate photoreceptor in the low-field limit.

Figure 4 The field dependencies of the photogeneration efficiency of dual-layer aggregate photoreceptors with different concentrations of TTA in the transport layer.

Figure 5 The field dependencies of the photogeneration efficiencies of single- and dual-layer photoreceptors prepared with AZO-FO. For the dual-layer structures, the transport layer contained a stilbene derivative (MAPS).

Figure 7 The field dependencies of the photogeneration efficiencies of dual-layer photoreceptors containing AZO-TPA. The transport layer contained the triarylamine derivative MAPS at different concentrations.

Umeda et al. (1993) measured photogeneration efficiencies of dual-layer photoreceptors comprised of AZO-TPA generation layers with transport layers... 

Figure 10 The energy scheme of photocarrier generation of a dual-layer photoreceptor.

Figure 11 The photogeneration efficiencies of a series of dual-layer photoreceptors versus the oxidation potential of the donor component of the transport layer. The generation layer contained AZO-TPA. The transport layers contained a series of biphenylamine (DBA) derivatives.

Figure 13 The field dependence of the photogeneration efficiency of a dual-layer photoreceptor, a single-layer photoreceptor, and the photoluminescence quenching of the dual-layer photoreceptor. The generation layer contained AZO-FO. The transport layer contained a stilbene derivative (MAPS).

Figure 14 A schematic of the photogeneration process proposed for dual-layer photoreceptors containing AZO-FO.

Umeda and Yokoyama (1997) measured photogeneration efficiencies of single- and dual-layer photoreceptors prepared with 4,4 -[(9,10-dihydro-9,10-dioxo-2,6-anthracenediyl)bis(azo)]bis[N-(3-bromophenyl)-3-hydroxy-2-naphth-alenecaiboxamide] (ABHN) (Hashimoto, 1985) and 4,4 -[l,4-phenylene-bis (2,l-ethenediyl-4,l-phenyleneazo)]bis[N-(2,4-dimethylphenyl)-3-hydroxy-2-na-phthalenecarboxamide] (PDHN) (Sasaki et al., 1980). For the dual-layer configuration, the transport layer contained MAPS. Single-layer photoreceptors... 

Hirao et al. (1995) measured photogeneration efficiencies of dual-layer photoreceptors prepared with generation layers of C q and C7q. The transport layers contained 22.5% N,N/-diphenyl-N,N,-bis(3-methvlphenyl)-(l,T-bi-phenyl)-4,4 -diamine. TPD. Figure 41 shows the spectral dependencies of the efficiencies computed on an incident photon basis. The efficiencies of C7q were somewhat higher than for C q. 

Figure 5 Bisazo pigments used in dual-layer photoreceptors.

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