Sandwich structured dielectrics for air-stable and flexible low-voltage organic transistors in ultrasensitive pressure sensing,Materials Chemistry Frontiers

当前位置： X-MOL 学术 › Mater. Chem. Front. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Sandwich structured dielectrics for air-stable and flexible low-voltage organic transistors in ultrasensitive pressure sensing
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2020-03-20 , DOI: 10.1039/d0qm00062k
Yue Jiang _{1,

2,

3,

4,

5} , Ziyang Liu _{1,

2,

3,

4,

5} , Zhigang Yin _{1,

2,

3,

4,

5} , Qingdong Zheng _{1,

2,

3,

4,

5}

Affiliation

Organic thin-film transistors (OTFTs) with plastic substrates show good promise as signal amplification devices in flexible electronics. Reducing power consumption and improving device stability are two crucial requirements for the practical sensor application of OTFTs. Here, novel sandwich structured dielectrics with a polyelectrolyte as a core layer and polystyrene as two cover layers are developed for flexible OTFTs with decreased operating voltages, promoted carrier transport, reduced hysteresis, and improved air-stability. The flexible OTFTs with the sandwich dielectric deliver an improved mobility of 4.65 cm² V⁻¹ s⁻¹ at a low-operating voltage of −3 V, and exhibit good stability over continuous air exposure for one week and even for two months. The great improvement in performance of these OTFTs can be attributed to the high-capacitance, large leakage suppression, smooth surface, salient hydrophobic feature, and excellent interfacial compatibility with organic semiconductors of the sandwich structured dielectrics. By using the optimized sandwich dielectric, flexible OTFT pressure sensors are further achieved with an ultrahigh sensitivity of 691.9 kPa⁻¹ in a wide detection range at a low-voltage of −3 V. The integrated OTFT sensor array is demonstrated to display high-resolution spatial pressure mapping and motion route monitoring, suggesting its potential in smart sensing and intelligent recognition.

中文翻译：

三明治结构电介质，用于超灵敏压力感测中的空气稳定和柔性低压有机晶体管

具有塑料基板的有机薄膜晶体管（OTFT）在柔性电子产品中作为信号放大设备显示出良好的前景。降低功耗并提高设备稳定性是OTFT实际应用中的两个关键要求。在此，针对具有降低的工作电压，促进的载流子传输，减少的磁滞和改善的空气稳定性的柔性OTFT，开发了具有聚电解质作为芯层和聚苯乙烯作为两个覆盖层的新型三明治结构电介质。具有夹层电介质的柔性OTFT的迁移率提高了4.65 cm ² V ^-1 s ^-1在-3 V的低工作电压下工作，并且在持续暴露于空气中一星期甚至两个月的情况下表现出良好的稳定性。这些OTFT的性能的极大提高可归因于高电容，大泄漏抑制，光滑的表面，显着的疏水性以及与夹心结构电介质的有机半导体的出色界面相容性。通过使用优化的夹层电介质，可进一步实现柔性OTFT压力传感器，该传感器在-3 V低压下的宽检测范围内具有691.9 kPa ^-1的超高灵敏度。展示了集成的OTFT传感器阵列可显示高分辨率空间压力映射和运动路线监视，表明其在智能传感和智能识别方面的潜力。

更新日期：2020-03-20

点击分享查看原文

点击收藏

阅读更多本刊最新论文