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Redox‐Induced Asymmetric Electrical Characteristics of Ferrocene‐Alkanethiolate Molecular Devices on Rigid and Flexible Substrates 下载免费PDF全文
Hyunhak Jeong Dongku Kim Gunuk Wang Sungjun Park Hanki Lee Kyungjune Cho Wang‐Taek Hwang Myung‐Han Yoon Yun Hee Jang Hyunwook Song Dong Xiang Takhee Lee 《Advanced functional materials》2014,24(17):2472-2480
The electrical properties of ferrocene‐alkanethiolate self‐assembled monolayers (SAMs) on a high yield solid‐state device structure are investigated. The devices are fabricated using a conductive polymer interlayer between the top electrode and the SAM on both silicon‐based rigid substrates and plastic‐based flexible substrates. Asymmetric electrical transport characteristics that originate from the ferrocene moieties are observed. In particular, a distinctive temperature dependence of the current (i.e., a decrease in current density as temperature increases) at a large reverse bias, which is associated with the redox reaction of ferrocene groups in the molecular junction, is found. It is further demonstrated that the molecular devices can function on flexible substrates under various mechanical stress configurations with consistent electrical characteristics. This study enhances the understanding of asymmetric molecules and may lead to the development of functional molecular electronic devices on both rigid and flexible substrates. 相似文献
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Francisco Gallego‐Gómez Eva M. García‐Frutos José M. Villalvilla José A. Quintana Enrique Gutierrez‐Puebla Angeles Monge María A. Díaz‐García Berta Gómez‐Lor 《Advanced functional materials》2011,21(4)
A new carbazole‐related small molecule exhibiting self‐assembly into ordered nanostructures in solution‐processed cast films has been synthesized and its charge‐photogeneration and ‐transport properties have been investigated. Large photoconductivity was measured in the amorphous state while an enormous improvement in the photoconduction properties was observed when the molecules spontaneously organized. Photocurrents increased upon self‐assembly by up to four orders of magnitude, mostly due to the drastic enhancement of the charge photogeneration. A greatly favorable arrangement of the aromatic cores in the resulting nanostructures, which were characterized by X‐ray analysis, may explain these improvements. Photocurrents of mA cm?2, on/off ratios of 104 and quantum efficiencies of unity at low field and light intensity, which are among the best values reported to date, along with the simplicity of fabrication, give this readily‐available organic system great potential for use in plastic optoelectronic devices. 相似文献
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Reversible Switching Phenomenon in Diarylethene Molecular Devices with Reduced Graphene Oxide Electrodes on Flexible Substrates 下载免费PDF全文
Dongku Kim Hyunhak Jeong Wang‐Taek Hwang Yeonsik Jang Dmytro Sysoiev Elke Scheer Thomas Huhn Misook Min Hyoyoung Lee Takhee Lee 《Advanced functional materials》2015,25(37):5918-5923
Photoswitching molecular electronic devices with reduced graphene oxide (rGO) top electrodes on flexible substrates are fabricated and characterized. It has been reported previously that diarylethene molecular devices with poly‐(3,4‐ethylenedioxythiophene) stabilized with poly‐(4‐styrenesulfonic acid)/Au top electrodes can hold two stable electrical conductance states when the devices are exposed to UV or visible light during device fabrication. However, those devices fail to show the reversible switching phenomenon in response to illumination after device fabrication. By employing conducting and transparent rGO top electrodes, it is demonstrated that the diarylethene molecular devices show a reversible switching phenomenon, i.e., the fabricated devices change their conductance state in response to the alternating illumination with UV and visible light. Furthermore, the molecular devices with rGO top electrodes also exhibit good longtime stability and reliable electrical characteristics when subjected to various mechanical stresses (bending radius down to 5 mm and bending cycle over 104). 相似文献
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Flexible Electronics: Transparent Nanopaper‐Based Flexible Organic Thin‐Film Transistor Array (Adv. Funct. Mater. 12/2014) 下载免费PDF全文
Yoshihide Fujisaki Hirotaka Koga Yoshiki Nakajima Mitsuru Nakata Hiroshi Tsuji Toshihiro Yamamoto Taiichiro Kurita Masaya Nogi Naoki Shimidzu 《Advanced functional materials》2014,24(12):1656-1656
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Yong Hyun Kim Christoph Sachse Michael L. Machala Christian May Lars Müller‐Meskamp Karl Leo 《Advanced functional materials》2011,21(6):1009-1009
Highly conductive poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films as stand‐alone electrodes for organic solar cells have been optimized using a solvent post‐treatment method. The treated PEDOT:PSS films show enhanced conductivities up to 1418 S cm?1, accompanied by structural and chemical changes. The effect of the solvent treatment on PEDOT:PSS has been investigated in detail and is shown to cause a reduction of insulating PSS in the conductive polymer layer. Using these optimized electrodes, ITO‐free, small molecule organic solar cells with a zinc phthalocyanine (ZnPc):fullerene C60 bulk heterojunction have been produced on glass and PET substrates. The system was further improved by pre‐heating the PEDOT:PSS electrodes, which enhanced the power conversion efficiency to the values obtained for solar cells on ITO electrodes. The results show that optimized PEDOT:PSS with solvent and thermal post‐treatment can be a very promising electrode material for highly efficient flexible ITO‐free organic solar cells. 相似文献
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Transient Electronics: Dissolvable Metals for Transient Electronics (Adv. Funct. Mater. 5/2014) 下载免费PDF全文
Lan Yin Huanyu Cheng Shimin Mao Richard Haasch Yuhao Liu Xu Xie Suk‐Won Hwang Harshvardhan Jain Seung‐Kyun Kang Yewang Su Rui Li Yonggang Huang John A. Rogers 《Advanced functional materials》2014,24(5):644-644
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Amorphous Semiconductors: Ionic Liquid Activation of Amorphous Metal‐Oxide Semiconductors for Flexible Transparent Electronic Devices (Adv. Funct. Mater. 17/2016) 下载免费PDF全文
Pushpa Raj Pudasaini Joo Hyon Noh Anthony T. Wong Olga S. Ovchinnikova Amanda V. Haglund Sheng Dai Thomas Zac Ward David Mandrus Philip D. Rack 《Advanced functional materials》2016,26(17):2774-2774
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Memory Devices: Configurable Resistive Switching between Memory and Threshold Characteristics for Protein‐Based Devices (Adv. Funct. Mater. 25/2015) 下载免费PDF全文
Hong Wang Yuanmin Du Yingtao Li Bowen Zhu Wan Ru Leow Yuangang Li Jisheng Pan Tao Wu Xiaodong Chen 《Advanced functional materials》2015,25(25):3980-3980
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Thin Film Transistors: High‐Performance Flexible Multilayer MoS2 Transistors on Solution‐Based Polyimide Substrates (Adv. Funct. Mater. 15/2016) 下载免费PDF全文
Won Geun Song Hyuk‐Jun Kwon Jozeph Park Junyeob Yeo Minjeong Kim Suntak Park Sungryul Yun Ki‐Uk Kyung Costas P. Grigoropoulos Sunkook Kim Young Ki Hong 《Advanced functional materials》2016,26(15):2397-2397