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8. All-Mxene Thermoelectric Nanogenerator

Author

Huang, Dazhen, primary, Kim, Hyunho, additional, Zou, Guodong, additional, Xu, Xiangming, additional, Zhu, Yunpei, additional, Ahmad, Kaleem, additional, Almutairi, Zeyad A., additional, and ALSHAREEF, HUSAM N., additional

Published
2022
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17. Photothermoelectric Response of Ti3C2TxMXene Confined Ion Channels

Author

Hong, Seunghyun, Zou, Guodong, Kim, Hyunho, Huang, Dazhen, Wang, Peng, and Alshareef, Husam N.

Abstract

With recent growing interest in biomimetic smart nanochannels, a biological sensory transduction in response to external stimuli has been of particular interest in the development of biomimetic nanofluidic systems. Here we demonstrate the MXene-based subnanometer ion channels that convert external temperature changes to electric signals viapreferential diffusion of cations under a thermal gradient. In particular, coupled with a photothermal conversion feature of MXenes, an array of the nanoconfined Ti3C2Txion channels can capture trans-nanochannel diffusion potentials under a light-driven axial temperature gradient. The nonisothermal open-circuit potential across channels is enhanced with increasing cationic permselectivity of confined channels, associated with the ionic concentration or pH of permeant fluids. The photothermoelectric ionic response (evaluated from the ionic Seebeck coefficient) reached up to 1 mV·K–1, which is comparable to biological thermosensory channels, and demonstrated stability and reproducibility in the absence and presence of an ionic concentration gradient. With advantages of physicochemical tunability and easy fabrication process, the lamellar ion conductors may be an important nanofluidic thermosensation platform possibly for biomimetic sensory systems.

Published
2020
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19. Flexible n-Type High-Performance Thermoelectric Thin Films of Poly(nickel-ethylenetetrathiolate) Prepared by an Electrochemical Method

Author

Sun, Yuanhui, primary, Qiu, Lin, additional, Tang, Liangpo, additional, Geng, Hua, additional, Wang, Hanfu, additional, Zhang, Fengjiao, additional, Huang, Dazhen, additional, Xu, Wei, additional, Yue, Peng, additional, Guan, Ying-shi, additional, Jiao, Fei, additional, Sun, Yimeng, additional, Tang, Dawei, additional, Di, Chong-an, additional, Yi, Yuanping, additional, and Zhu, Daoben, additional

Published
2016
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27. Dithienoindophenines: p-Type Semiconductors Designed by Quinoid Stabilization for Solar-Cell Applications.

Author

Ren, Longbin, Fan, Haijun, Huang, Dazhen, Yuan, Dafei, Di, Chong ‐ an, and Zhu, Xiaozhang

Subjects
PHOTOVOLTAIC effect, SOLAR cell design, QUINOIDINE, SEMICONDUCTOR design, ORGANIC electronics
Abstract

Compared with the dominant aromatic conjugated materials, photovoltaic applications of their quinoidal counterparts featuring rigid and planar molecular structures have long been unexplored despite their narrow optical bandgaps, large absorption coefficients, and excellent charge-transport properties. The design and synthesis of dithienoindophenine derivatives (DTIPs) by stabilizing the quinoidal resonance of the parent indophenine framework is reported here. Compared with the ambipolar indophenine derivatives, DTIPs with the fixed molecular configuration are found to be p-type semiconductors exhibiting excellent unipolar hole mobilities up to 0.22 cm2 V−1 s−1, which is one order of magnitude higher than that of the parent IP-O and is even comparable to that of QQT(CN)4-based single-crystal field-effect transistors (FET). DTIPs exhibit better photovoltaic performance than their aromatic bithieno[3,4- b]thiophene (BTT) counterparts with an optimal power-conversion efficiency (PCE) of 4.07 %. [ABSTRACT FROM AUTHOR]

Published
2016
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34. Photothermoelectric Response of Ti 3 C 2 T x MXene Confined Ion Channels.

Author

Hong S, Zou G, Kim H, Huang D, Wang P, and Alshareef HN

Abstract

With recent growing interest in biomimetic smart nanochannels, a biological sensory transduction in response to external stimuli has been of particular interest in the development of biomimetic nanofluidic systems. Here we demonstrate the MXene-based subnanometer ion channels that convert external temperature changes to electric signals via preferential diffusion of cations under a thermal gradient. In particular, coupled with a photothermal conversion feature of MXenes, an array of the nanoconfined Ti 3 C 2 T x ion channels can capture trans-nanochannel diffusion potentials under a light-driven axial temperature gradient. The nonisothermal open-circuit potential across channels is enhanced with increasing cationic permselectivity of confined channels, associated with the ionic concentration or pH of permeant fluids. The photothermoelectric ionic response (evaluated from the ionic Seebeck coefficient) reached up to 1 mV·K -1 , which is comparable to biological thermosensory channels, and demonstrated stability and reproducibility in the absence and presence of an ionic concentration gradient. With advantages of physicochemical tunability and easy fabrication process, the lamellar ion conductors may be an important nanofluidic thermosensation platform possibly for biomimetic sensory systems.

Published
2020
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35. Dithienoindophenines: p-Type Semiconductors Designed by Quinoid Stabilization for Solar-Cell Applications.

Author

Ren L, Fan H, Huang D, Yuan D, Di CA, and Zhu X

Abstract

Compared with the dominant aromatic conjugated materials, photovoltaic applications of their quinoidal counterparts featuring rigid and planar molecular structures have long been unexplored despite their narrow optical bandgaps, large absorption coefficients, and excellent charge-transport properties. The design and synthesis of dithienoindophenine derivatives (DTIPs) by stabilizing the quinoidal resonance of the parent indophenine framework is reported here. Compared with the ambipolar indophenine derivatives, DTIPs with the fixed molecular configuration are found to be p-type semiconductors exhibiting excellent unipolar hole mobilities up to 0.22 cm 2  V -1  s -1 , which is one order of magnitude higher than that of the parent IP-O and is even comparable to that of QQT(CN)4-based single-crystal field-effect transistors (FET). DTIPs exhibit better photovoltaic performance than their aromatic bithieno[3,4-b]thiophene (BTT) counterparts with an optimal power-conversion efficiency (PCE) of 4.07 %., (© 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)

Published
2016
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36. Bismuth Interfacial Doping of Organic Small Molecules for High Performance n-type Thermoelectric Materials.

Author

Huang D, Wang C, Zou Y, Shen X, Zang Y, Shen H, Gao X, Yi Y, Xu W, Di CA, and Zhu D

Abstract

Development of chemically doped high performance n-type organic thermoelectric (TE) materials is of vital importance for flexible power generating applications. For the first time, bismuth (Bi) n-type chemical doping of organic semiconductors is described, enabling high performance TE materials. The Bi interfacial doping of thiophene-diketopyrrolopyrrole-based quinoidal (TDPPQ) molecules endows the film with a balanced electrical conductivity of 3.3 S cm(-1) and a Seebeck coefficient of 585 μV K(-1) . The newly developed TE material possesses a maximum power factor of 113 μW m(-1)  K(-2) , which is at the forefront for organic small molecule-based n-type TE materials. These studies reveal that fine-tuning of the heavy metal doping of organic semiconductors opens up a new strategy for exploring high performance organic TE materials., (© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)

Published
2016
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