Jang Young Jin, Jung Yoo Eil, Kim Gun Woo, Lee Chang Yeon, Park Yeong Don
Department of Energy and Chemical Engineering, Incheon National University Incheon 22012 Republic of Korea
RSC Adv. 2019 Jan 2;9(1):529-535. doi: 10.1039/c8ra09201j. eCollection 2018 Dec 19.
A facile, reliable, fast-response poly(3-hexylthiophene-2,5-diyl) (P3HT)-based humidity sensor was developed by introducing metal-organic frameworks (MOFs), HKUST-1, into the semiconducting layer. HKUST-1 displayed an excellent ability to capture water molecules, thereby generating and attracting charge carriers derived from the water molecules present in the active layer. The HKUST-1/P3HT hybrid film showed excellent device sensitivity with an enhanced electrical current and a threshold voltage shift as a function of the relative humidity due to the superior gas capture properties and the porosity of HKUST-1. The surface energy of the substrate altered the distribution and location of HKUST-1 in the active layer, which improved the sensitivity of the hydrophilic surface. A dynamic gas sensing test revealed that the hybrid film displayed a reliable and stable performance with fast response and recovery times. The introduction of MOFs into a conjugated polymer stabilized and sensitized the devices, providing a facile method of improving gas sensor technologies based on organic semiconductors.
通过将金属有机框架材料（MOFs）HKUST-1引入半导体层，开发了一种简便、可靠、响应快速的基于聚（3-己基噻吩-2,5-二亚基）（P3HT）的湿度传感器。HKUST-1表现出优异的捕获水分子的能力，从而产生并吸引有源层中存在的水分子衍生的电荷载流子。由于HKUST-1具有优异的气体捕获性能和孔隙率，HKUST-1/P3HT混合膜表现出优异的器件灵敏度，其电流增强且阈值电压随相对湿度变化而发生偏移。基底的表面能改变了HKUST-1在有源层中的分布和位置，提高了亲水性表面的灵敏度。动态气体传感测试表明，该混合膜具有可靠、稳定的性能，响应和恢复时间快。将MOFs引入共轭聚合物中使器件稳定并敏化，为改进基于有机半导体的气体传感器技术提供了一种简便方法。
