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Polycrystalline SnO 2 Visible‐Light‐Transparent CO 2 Sensor Integrated with NiO/ZnO Solar Cell for Self‐Powered Devices
Author(s) -
Tanuma Ryo,
Sugiyama Mutsumi
Publication year - 2019
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201800749
Subject(s) - non blocking i/o , materials science , optoelectronics , visible spectrum , solar cell , transmittance , sputtering , x ray photoelectron spectroscopy , crystallite , photovoltaic system , electrode , thin film , nanotechnology , chemical engineering , chemistry , catalysis , ecology , biochemistry , engineering , metallurgy , biology
Monolithic visible‐light‐transparent carbon dioxide (CO 2 ) sensor/solar cell‐integrated devices are fabricated using RF sputtering. The optical transmittance of the integrated device in the visible region is found to be over 60%. The solar cell is composed of p‐type NiO and n‐type ZnO layers, and exhibits small but noticeable photovoltaic effect under illumination. The CO 2 sensor layer is made from LaOCl/SnO 2 layers, and its resistance varies when electrical power is supplied from an external power source. XPS measurement reveals that adsorbed oxygen, which influences the sensitivity of gas sensors, increases with increasing LaOCl catalyst concentration. The results of this study can serve as a first step toward achieving a new type of visible‐light‐transparent CO 2 sensor/UV absorbed solar cell for integrated self‐powered devices.