基于晶体TIPS-并五苯薄膜的超灵敏有机半导体NO2传感器,Advanced Materials

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基于晶体TIPS-并五苯薄膜的超灵敏有机半导体NO2传感器
Advanced Materials ( IF 27.4 ) Pub Date : 2017-08-07 , DOI: 10.1002/adma.201703192
Zi Wang ₁ , Lizhen Huang ₁ , Xiaofei Zhu ₁ , Xu Zhou ₁ , Lifeng Chi ₁

Affiliation

有机半导体气体传感器是具有高选择性的室温操作气体传感器的有希望的候选者之一。然而，长期以来，有机半导体传感器的性能，尤其是用于检测氧化性气体的性能，远远落后于传统的金属氧化物气体传感器。尽管已经进行了广泛的尝试来解决该问题，但是对传感机制的性能和理解仍然远远不够。在此，超敏感有机半导体NO ₂报告了基于6,13-双（三异丙基甲硅烷基乙炔基）并五苯（TIPS-petacene）的传感器。该器件实现了超过1000％/ ppm的灵敏度和快速的响应/恢复，以及20 ppb的低检测限（LOD），所有这些都达到了金属氧化物传感器的水平。对有机薄膜的形貌和电学特性进行综合分析后发现，超高性能主要与薄膜电荷传输能力有关，这在以前的研究中很少涉及。有效的电荷传输和低的原始电荷载流子浓度相结合被证明是获得高性能有机半导体气体传感器的有效途径。

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An Ultrasensitive Organic Semiconductor NO2 Sensor Based on Crystalline TIPS‐Pentacene Films

Organic semiconductor gas sensor is one of the promising candidates of room temperature operated gas sensors with high selectivity. However, for a long time the performance of organic semiconductor sensors, especially for the detection of oxidizing gases, is far behind that of the traditional metal oxide gas sensors. Although intensive attempts have been made to address the problem, the performance and the understanding of the sensing mechanism are still far from sufficient. Herein, an ultrasensitive organic semiconductor NO₂ sensor based on 6,13‐bis(triisopropylsilylethynyl)pentacene (TIPS‐petacene) is reported. The device achieves a sensitivity over 1000%/ppm and fast response/recovery, together with a low limit of detection (LOD) of 20 ppb, all of which reach the level of metal oxide sensors. After a comprehensive analysis on the morphology and electrical properties of the organic films, it is revealed that the ultrahigh performance is largely related to the film charge transport ability, which was less concerned in the studies previously. And the combination of efficient charge transport and low original charge carrier concentration is demonstrated to be an effective access to obtain high performance organic semiconductor gas sensors.

更新日期：2017-08-07

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