Abstract
We present a high performance self-powered photodetector fabricated using pure and rare earth (RE) doped titania on p-Si substrate. The structural study confirms the presence of major anatase phase for pure, Sm and Lu doped samples, while Nd doped sample showed mixed phase of anatase and brookite. A pin hole free, uniform nature of the surface was confirmed through morphological study. The I–V characteristics of the devices under dark condition were measured and diode parameters were extracted from Thermionic Emission and Cheung models. The devices under UV illumination confirmed the self-powered behaviour with high open circuit voltage and low short circuit current. The photodetector parameters like responsivity and detectivity were quantified to address the performance of the devices.
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