p- and n-Channel Photothermoelectric Conversion Based on Ultralong Near-Infrared Wavelengths Absorbing Polymers
p- and n-Channel Photothermoelectric Conversion Based on Ultralong Near-Infrared Wavelengths Absorbing Polymers
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DOI：
10.1021/acsapm.8b00234
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发表时间：
2019-02
影响因子：
5
通讯作者：
Tsukasa Hasegawa;M. Ashizawa;Y. Hayashi;S. Kawauchi;H. Masunaga;T. Hikima;T. Manaka;Hidetoshi Matsumoto
中科院分区：
文献类型：
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作者：
Tsukasa Hasegawa;M. Ashizawa;Y. Hayashi;S. Kawauchi;H. Masunaga;T. Hikima;T. Manaka;Hidetoshi Matsumoto
吸收近红外（NIR）光的有机材料在光电子器件的制造中非常有吸引力。在本研究中，我们开发了一种超低能隙共聚物TzQI-TDPP，其由噻二唑并喹喔啉酰亚胺（TzQI）和噻吩侧接的二酮基吡咯并吡咯（TDPP）重复单元组成。TzQI-TDPP具有与p沟道噻吩并异靛蓝基均聚物PTII几乎相同的窄能隙（0.60 eV）。这两种聚合物在NIR-II光窗（1000 - 1700 nm）中表现出宽而强的光吸收。使用场效应晶体管检查电荷极性表明PTII为p沟道传导，TzQI-TDPP为n沟道主导双极传导，具有中等迁移率，其中TzQI-TDPP薄膜显示空气稳定的n沟道性能，30天后的持续迁移率超过0.003 cm 2 V-1 s-1。此外，我们还制作了一个光电热效应器件，研究了近红外-Ⅱ光窗的光热和热电效应。两个波兰...
Organic materials absorbing near-infrared (NIR) light are very attractive for the fabrication of optoelectronic devices. In this study, we developed an ultralow energy gap copolymer TzQI-TDPP composed of thiadiazoloquinoxalinimide (TzQI) and thiophene-flanked diketopyrrolopyrrole (TDPP) repeat units. TzQI-TDPP has a nearly identical narrow energy gap (0.60 eV) to that of the p-channel thienoisoindigo-based homopolymer PTII. Both polymers exhibit broad and intense optical absorption in the NIR-II light window (1000–1700 nm). Examination of charge polarity using field-effect transistors indicates p-channel conduction for PTII and n-channel-dominant ambipolar conduction for TzQI-TDPP with moderate mobilities, in which a thin film of TzQI-TDPP displayed air-stable n-channel performance with a persistent mobility of over 0.003 cm2 V–1 s–1 after 30 days. In addition, we explored the photothermal (PT) and thermoelectric (TE) effects in the NIR-II light window by fabricating a photothermoelectric device. Both pol...