Rare-Earth Doped Oxide TFT Structure for Mobility and Stability

The patent uses a composite semiconductor layer structure combining metal oxide semiconductor material with organic semiconductor material. The metal oxide layer provides high carrier mobility while the organic semiconductor layer provides stability against environmental factors. This composite structure resolves the contradiction by allowing each material to contribute its strengths: the metal oxide portion maintains high speed performance while the organic portion protects against degradation from light, water, and oxygen exposure.

The patent introduces rare earth element doping as a parameter change in the metal oxide semiconductor material composition. By carefully controlling the doping concentration and selecting specific rare earth elements, the carrier mobility is enhanced while maintaining compatibility with existing manufacturing processes. The principle of parameter changes allows optimization of material properties without fundamentally altering the manufacturing approach.

The patent segments the semiconductor layer into two distinct functional layers: a metal oxide semiconductor layer for high mobility and an organic semiconductor layer for stability and protection. This segmentation allows each layer to perform its specific function optimally while working together as an integrated structure. The segmentation principle resolves the complexity issue by creating a modular design where each layer's role is clearly defined and can be optimized independently.