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Electronic structure engineering in organic thermoelectric materials

Journal of Energy Chemistry 2021年第11期30卷 204-219,I0005页

作者： Xiaojuan Dai Qing Meng Fengjiao Zhang Ye Zou Chong-an Di Daoben Zhu Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China

Electronic structures, which play a key role in determining electrical and optical properties of π-conjugated organic materials, have attracted tremendous interest. Efficient thermoelectric (TE) conversion of organic materials has rigorous requirements on electronic structures. Recently, the rational design and precise modulation of electronic structures have exhibited great potential in exploring state-of-the-art organic TE materials. This review focuses on the regulation of electronic structures of organic materials toward efficient TE conversion. First, we present the basic knowledge regarding electronic structures and the requirements for efficient TE conversion of organic materials, followed by a brief introduction of commonly used methods for electronic structure characterization. Next, we highlight the key strategies of electronic structure engineering for high-performance organic TE materials. Finally, an overview of the electronic structure engineering of organic TE materials, along with current challenges and future research directions, are provided.

关键词： organic thermoelectric materials Electronic structure organic semiconductors

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Advances in organic thermoelectric materials and devices for smart applications

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SmartMat 2021年第4期2卷 426-445页

作者： Yue Zhao Liyao Liu Fengjiao Zhang Chong‐an Di Daoben Zhu School of Chemical Science University of Chinese Academy of SciencesBeijingChina Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijingChina

organic thermoelectric(OTE)materials have been considered to be promising candidates for large area and low‐cost wearable devices owing to their tailorable molecular structure,intrinsic flexibility,and prominent solution *** importantly,OTE materials offer direct energy conversion from the human body,solid‐state cooling at low electric consumption,and diversified ***,we summarize recent developments of OTE materials and devices for smart *** first review the fundamentals of OTE materials from the viewpoint of thermoelectric performance,mechanical properties and bionic ***,we describe OTE devices in flexible generators,photothermoelectric detectors,self‐powered sensors,and ultra‐thin cooling ***,we present the challenges and perspectives on OTE materials as well as devices in wearable electronics and fascinating applications in the Internet of Things.

关键词： flexible generators organic thermoelectric materials self‐powered sensors smart electronics thin‐film cooling

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The enhanced power factor of multi-walled carbon nanotube/R stabilized polyacrylonitrile composites due to the partially conjugated structure

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Journal of Materiomics 2021年第1期7卷 51-58页

作者： Jiang Li Alayna Brieann Huckleby Mei Zhang High-Performance materials Institute Florida State UniversityDepartment of Industrial and Manufacturing EngineeringFAMU-FSU College of Engineering2525 Pottsdamer StreetTallahasseeFL32310USA

The studies of organic thermoelectric(TE)materials mainly focus on conductive polymers due to their conjugated molecular structures and high intrinsic electrical *** the conductive polymer is mixed with certain insulating polymers,the power factor was found *** is doubtful that the partially conjugated molecular structure is beneficial to the TE ***(PAN)is an insulating polymer with a non-conjugated structure in its backbone,however,it has a partially conjugated structure after thermal *** this work,a composite of PAN and multi-walled carbon nanotubes(MWCNT)was made and thermally treated in order to study the partially conjugated structure on the improvement of the power *** controlling the PAN content and the temperature of thermal treatments,a maximum power factor of 22 mW/mK2 was obtained from the MWCNT/PAN composite with 45%PAN content after thermally treated at 300℃in air,which is 300%and 80%higher than that without PAN and before thermal treatment,*** is demonstrated that the partially conjugated polymers play an important role in TE performance and they are promising candidates for high-efficient organic TE materials.

关键词： Multi-walled carbon nanotube Partially conjugated polymer organic thermoelectric materials High power factor

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