Multimodal Gas Sensor Detecting Hydroxyl Groups with Phase Transition Based on Eco-Friendly Lead-Free Metal Halides

Daseul Lee; Seung-Jea Lee; Jae Ho KimJuyun ParkYong-Cheol KangMyungkwan SongHyung Woo LeeHan Seul KimJin Woo Choi

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Multimodal Gas Sensor Detecting Hydroxyl Groups with Phase Transition Based on Eco-Friendly Lead-Free Metal Halides

机译：Multimodal Gas Sensor Detecting Hydroxyl Groups with Phase Transition Based on Eco-Friendly Lead-Free Metal Halides

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An electrical and optical responsive chemical-semiconductor gas sensor isdeveloped using Cu(I) halides with a phase transition mechanism. Cu(Ⅰ) materialsexhibit reversible phase transitions between the Cs_3Cu_2I_5 and CsCu_2I_3 withdifferent properties, owing to the formation/destruction of the Cs–I and Cu–Cubonding when the hydroxyl groups are attached/detached. Among varioustoxic and atmospheric gases, a Cu(Ⅰ)-based gas sensor has high selectivity indetecting the hydroxyl group, and the highest sensitivity to water. The reactivityis determined by the polarity, where water with the largest polarity has thestrongest attraction for Cu~+ and I? ions, letting phase transition occur easily.The multimodal sensor red-shifts emission from 445 to 575 nm when it detectshydroxyl gas, and the moisture-sensitive sensor visually confirms response tobreaths in less than 5 s and recovery in the air in less than 30 s. The gas sensorcan operate at room temperature while applying a constant bias voltage of 1 V,and it also shows excellent sensitivity in a relative humidity range of 15–75%.Furthermore, the sensor maintained ≈90% of its initial responsivity over 1 year.

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《Advanced functional materials》 |2022年第28期|2202207.1-2202207.10|共10页
作者
Daseul Lee; Seung-Jea Lee; Jae Ho KimJuyun ParkYong-Cheol KangMyungkwan SongHyung Woo LeeHan Seul KimJin Woo Choi;
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作者单位

Department of Energy and Electronic MaterialsKorea Institute of Materials Science (KIMS)797 Changwon-daero, Sungsan-gu, Changwon, Gyeongsangnam-do51508, Republic of Korea, Department of Nano Fusion TechnologyPusan National University2 Busandaehak-ro 63beo;

Department of Energy and Electronic MaterialsKorea Institute of Materials Science (KIMS)797 Changwon-daero, Sungsan-gu, Changwon, Gyeongsangnam-do51508, Republic of Korea;

Department of ChemistryPukyong National University45 Yongso-Ro, Nam-gu, Busan 48513, Republic of KoreaDepartment of Nano Fusion TechnologyPusan National University2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241,Republic of Korea, Department of Nanoenergy Engineering and Research Center of EnergyConvergence TechnologyPusan Natuional University2 BusaSupercomputing Application CenterDivision of National SupercomputingKorea Institute of Science and Technology Information (KISTI)245 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea;

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正文语种英语
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eco-friendly; metal halides; multimodal gas sensors; perovskites; phase transitions;

Multimodal Gas Sensor Detecting Hydroxyl Groups with Phase Transition Based on Eco-Friendly Lead-Free Metal Halides

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