Tunable TiO2 films for high-performing transparent Schottky photodetector

We demonstrate the transparent Schottky photodetector of the configuration Cu/TiO2/FTO unveiling superior photodetection properties. The improved performance of fabricated photodetector was ascribed to high quality rutile-nanocrystalline TiO2 films with very high absorption coefficient (~6×105cm−1)...

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Bibliographic Details
Published inMaterials science in semiconductor processing Vol. 61; pp. 45 - 49
Main Authors Patel, Dipal B., Chauhan, Khushbu R., Park, Wang-Hee, Kim, Hong-Sik, Kim, Joondong, Yun, Ju-Hyung
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.04.2017
Subjects
Detectivity
Frenkel excitons
Responsivity
Schottky photodetector
Transparent TiO2 film
Urbach energy
Transparent TiO2 film
Detectivity
Urbach energy
Schottky photodetector
Frenkel excitons
Responsivity
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Summary:We demonstrate the transparent Schottky photodetector of the configuration Cu/TiO2/FTO unveiling superior photodetection properties. The improved performance of fabricated photodetector was ascribed to high quality rutile-nanocrystalline TiO2 films with very high absorption coefficient (~6×105cm−1) and excitonic localized states. The existence of such localized states in TiO2 Schottky device offered fastest response time of 1.12ms suggesting their application in fast switching photodetectors. In addition, the photodetectors showed high responsivity of the value 0.897 A/W and detectivity 4.5×1012 Jones. This transparent TiO2 design would provide a functional route for various photoelectric device applications.
ISSN:1369-8001
1873-4081
DOI:10.1016/j.mssp.2016.12.036