发光学报, 2018, 39 (8): 1136, 网络出版: 2018-08-27
氧敏感性供体-受体共轭聚合物薄膜晶体管
Oxygen Sensing Characteristics of Donor-acceptor Conjugated Polymer Transistors of Organic Semiconductor Film
有机薄膜晶体管 供体-受体共轭聚合物 双极性传输 氧检测 OTFT donor-acceptor conjugated polymers ambipolar transmission oxygen detection
摘要
研究了基于供体-受体共轭聚合物双(2-氧代二氢吲哚-3-亚基)-苯并二呋喃-二酮和联噻吩(PBIBDF-BT)薄膜晶体管的氧传感特性。在不同的氧气浓度下, 器件展示了空穴和电子载流子的传感特性, 如源漏电流、迁移率和亚阈值摆幅随着氧从半导体层内吸附/解吸附的过程中被调节。实验结果表明: 随着真空度从0.7 Pa上升到0.08 Pa, 即氧气的体积分数从~5.3×10-6降到~6×10-7, 对于P型传输的迁移率、源漏电流(开态)和亚阈值摆幅分别改变了-52.7%、-51.3%和48%, 而对于N型传输分别改变了42.3%、59.5%和-39%。并且腔室中氧气的浓度从~8×10-7降到~6×10-7,变化了~2×10-7, 相应的P型和N型源漏电流分别变化了-45.9%和31.1%。基于PBIBDF-BT聚合物薄膜晶体管能够实现对氧气的双极性检测和低的氧检测线。
Abstract
The oxygen sensing transistor characteristics of a conjugated polymer based on bis(2-oxoindolin-3-ylidene)-benzodifuran-dione and bithiophene (PBIBDF-BT) were investigated. The devices depicted both hole- and electron-carriers transport sensing properties in different oxygen atmospheres, where characteristics like drain current, mobility(μ) and subthreshold swing(SS) were tuned through the absorption/desorption processes of oxygen into the semiconductor layers. Experimental results indicate that the drain current, μ and SS based on the PBIBDF-BT polymer TFTs changed by -52.7%, -51.3% and 48% for P-channel, while changed by 42.3%, 59.5% and -39% for N-channel as the vacuum from 0.7 Pa (oxygen volumn fraction ~ 5.3×10-6) to 0.08 Pa (oxygen volumn fraction ~ 6×10-7). As the oxygen volumn fraction decreases from ~ 8×10-7 to ~ 6×10-7, the drain current of P-channel and N-channel increased by -45.9% and 31.1%, respectively. PBIBDF-BT polymer TFTs show bipolar detection of oxygen, and has a low oxygen detection line.
薛战, 田丰收, 王庆贺, 王晓鸿, 邱龙臻. 氧敏感性供体-受体共轭聚合物薄膜晶体管[J]. 发光学报, 2018, 39(8): 1136. XUE Zhan, TIAN Feng-shou, WANG Qing-he, WANG Xiao-hong, QIU Long-zhen. Oxygen Sensing Characteristics of Donor-acceptor Conjugated Polymer Transistors of Organic Semiconductor Film[J]. Chinese Journal of Luminescence, 2018, 39(8): 1136.