Conducting Interface in Oxide Homojunction: Understanding of Superior Properties in Black TiO2

Black TiO2 nanoparticles with a crystalline core and amorphous-shell structure exhibit superior optoelectronic, properties. in comparison with pristine TiO2. The fundamental mechanisms underlying these enhancements, however, remain, unclear; largely due to the inherent complexities, and limitations of powder materials. Here, we fabricate TiO2 homojunction films, consisting of an oxygen-deficient amorphous layer on top Of a, highly crystalline layer, to simulate the structural/functional, configuration of black TiO2 nanoparticles. Metallic conduction is achieved at the crystalline amorphous homointerface via electronic interface reconstruction, which we show to be the: main reason for the enhanced electron transport of black TiO2. This work riot only achieves an unprecedented understanding of black TiO2 but also provides new perspective or investigating carnet generation and transport, behavior at oxide interfaces;, which are of tremendous fundamental and technological interest.