Effect of Pd concentration on the structural, morphological and photodiode properties of TiO2 nanoparticles
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In this work, intrinsic and doped TiO2 nanoparticles with different Palladium (Pd) concentrations were successfully synthesized via solvothermal method. The structural, morphological and optical properties of the as-synthesized nanoparticles are investigated. Photodiode properties of the as-synthesized nanoparticles based spin coated films are also investigated. A p-n and p-i-n heterojunction structures are fabricated on ITO coated glass and studied for small (± 5 V) bias voltage. From the IV characterization, responsivity, sensitivity, external quantum efficiency and switch current ratio is evaluated for both the heterostructures. Results showed that the proposed p-i-n photodiode attain good stability and quick response as compared to the conventional p-n photodiode. Hall measurement confirmed that heavily Pd doped TiO2 nanoparticles is an efficient p-type material for fabrication of thin film photo-devices.
This work was supported by the Science and Engineering Research Board (SERB), India (File No. EEQ/2016/000119).
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Conflict of interest
The authors declare that they have no conflict of interest.
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