Kim, Hyeonghun Kim, Woochul Lee, Ryeri Cho, Sungjun Park, Jiyoon Pak, Yusin Jung, Gun Young 2024-01-19T17:34:11Z 2024-01-19T17:34:11Z 2021-09-05 2020-04-24 2379-3694 https://pubs.kist.re.kr/handle/201004/118714 Although battery-free gas sensors ( e.g., photovoltaic or triboelectric sensors) have recently appeared to resolve the power consumption issue of conventional chemiresistors, severe technical barriers still remain. Especially, their signals varying under ambient conditions such as light intensity restrict the utilization of these sensors. Insufficient sensing performances (low response and slow sensing rate) of previous battery-free sensors are also an obstacle for practical use. Herein, a photovoltaic hydrogen (H-2)-sensing platform having constant sensing responses regardless of light conditions is demonstrated. The platform consists of two photovoltaic units: (1) a palladium (Pd)-decorated n-IGZO/p-Si photodiode covered with a microporous zeolitic imidazolate framework-8 (ZIF-8) film and (2) a device with the same configuration, but without the Sensor 2 (w/o Pd) Pd catalyst as a reference to calibrate the base current of sensor (1). The platform after calibration yields accurate response values in real time regardless of unknown irradiance. Besides, the sensing performances (e.g., sensing response of 1.57 x 10(4)% at 1% H-2 with a response time <15 s) of our platform are comparable with those of the conventional resistive H-2 sensors, which yield unprecedented results in photovoltaic H-2 sensors. English AMER CHEMICAL SOC POWERED GAS SENSOR METAL NANOPARTICLES STORAGE SENSITIVITY STABILITY NANOTUBES HYBRID High-Performance Photovoltaic Hydrogen Sensing Platform with a Light-Intensity Calibration Module Article 10.1021/acssensors.9b02565 1 ACS Sensors, v.5, no.4, pp.1050 - 1057 ACS Sensors 5 4 1050 1057 scie scopus 000529155400021 2-s2.0-85084024584 Chemistry, Multidisciplinary Chemistry, Analytical Nanoscience & Nanotechnology Chemistry Science & Technology - Other Topics Article POWERED GAS SENSOR METAL NANOPARTICLES STORAGE SENSITIVITY STABILITY NANOTUBES HYBRID battery-free gas sensor photovoltaic gas sensor hydrogen sensor zeolitic imidazolate framework light-intensity calibration module