Abstract
This work presents the development of a transparent photodetector based on a composite of tungsten trioxide (WO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> ) and silver nanowires (Ag NWs). A uniform transparent conducting film with a resistance of 64 Ω and a transparency of 89 % (at 550 nm) is obtained via spin coating followed by annealing at 120 °C. The device exhibits negative photo-conductance, which can be attributed to the Schottky junction formation at the silver and tungsten oxide interface. The device shows a sensitivity of 25.6 mAW <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> and detectivity of 3.38 × 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">8</sup> Jones at a low bias voltage of 1 V at room temperature. The low annealing temperature makes the composite compatible with conventional flexible substrates.
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