Open AccessPhotodetector based on Rutile and Anatase TiO2nanostructures/n-Si Heterojunction
Author(s) -
S A Hamdan,
Isam M. Ibrahim,
Islam Ali
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2114/1/012025
Subject(s) - rutile , anatase , materials science , heterojunction , responsivity , crystallite , photodetector , optoelectronics , absorption (acoustics) , nanocrystalline material , photocatalysis , analytical chemistry (journal) , nanotechnology , chemical engineering , chemistry , composite material , catalysis , metallurgy , biochemistry , chromatography , engineering
Rutile and anatase titanium dioxide TiO 2 nanostructures has been prepared successfully by hydrothermal technique. Also Rutile and anatase TiO 2 /n-Si heterojunction detector (HJ) has been fabricated. Hall Effect measurements confirmed that prepared films are n-type. The optical absorption spectra showed the prepared films have peak absorption in UV region. TiO 2 /n-Si heterojunction had exhibited diode-like rectifying I-V behaviour in the dark as well as under the illumination. Ideality factor greater than 2 and rectification factor for Rutile TiO 2 /n-Si HJ is equal 32.0961 higher than anatase TiO 2 /n-Si HJ. Photodetetor based on rutile TiO 2 /n-Si HJ showed higher responsivity and incident photon-to-current efficiency (IPCE) than photodetector based on anatase TiO 2 /n-Si HJ. Photodetetor based on rutile TiO 2 /n-Si HJ has responsivity is 69.11Amp/W at 570 nm and IPCE is 21.2%at 370nm and 1.38% at 570nm. For the purpose of investigating the impacts of TiO 2 crystal phase upon the performance of the device despite the fact that rutile has a lower band gap compared to anatase, rutile exhibits better photovoltaic activity due to its higher specific surface area.