Ferroelectric Solar Cell Charge Separation

The patent employs composite material structures where ferroelectric materials are integrated with conductive materials. Specifically, ferroelectric perovskite layers are combined with conductive oxides or organic conductors to create a composite architecture that simultaneously achieves strong polarization for charge separation and adequate conductivity for charge transport. This composite approach resolves the contradiction by allowing each material to contribute its advantageous property.

The patent modifies key parameters of the ferroelectric material including crystallinity enhancement, grain size optimization, and composition adjustment to balance polarization strength and charge transport. By controlling synthesis conditions to achieve higher crystallinity and optimizing the ferroelectric component ratio, the material exhibits improved remanent polarization while maintaining sufficient charge transport pathways.

The patent creates composite structures combining inorganic ferroelectric nanomaterials with conductive components. The inorganic ferroelectric phase provides high remanent polarization, while the conductive matrix or interface regions ensure efficient charge transport. This composite architecture allows the system to benefit from the high polarization of inorganic materials without suffering from their insulating characteristics.

The patent implements local quality optimization by creating regions with different properties within the solar cell structure. Ferroelectric nanomaterials are concentrated in specific layers or regions where high polarization is most beneficial for charge separation, while conductive pathways are engineered in adjacent or interfacial regions to facilitate charge transport. This spatial differentiation allows each region to optimize its function.

The patent utilizes composite material design where ferroelectric materials are integrated with conductive materials to create a synergistic structure. The ferroelectric component enhances photoelectric conversion through strong polarization effects, while the conductive component ensures efficient charge transport. This composite approach allows both functions to coexist and enhance each other.

The patent introduces intermediary materials or interface structures that mediate between the ferroelectric material and the charge transport pathways. These intermediary layers or interface regions facilitate the transition of charges from the ferroelectric domain to the transport channels, reducing the negative impact of the insulating property while preserving the polarization benefit.