scholarly journals Organic Semiconductor Nanotubes for Electrochemical Devices (Adv. Funct. Mater. 49/2021)

2021 ◽  
Vol 31 (49) ◽  
pp. 2170359
Author(s):  
Mohammadjavad Eslamian ◽  
Fereshtehsadat Mirab ◽  
Vijay Krishna Raghunathan ◽  
Sheereen Majd ◽  
Mohammad Reza Abidian
Keyword(s):  
Organic Semiconductor ◽  
Electrochemical Devices ◽  
Semiconductor Nanotubes

Organic Semiconductor Nanotubes for Electrochemical Devices

2021 ◽  
pp. 2105358
Author(s):  
Mohammadjavad Eslamian ◽  
Fereshtehsadat Mirab ◽  
Vijay Krishna Raghunathan ◽  
Sheereen Majd ◽  
Mohammad Reza Abidian
Keyword(s):  
Organic Semiconductor ◽  
Electrochemical Devices ◽  
Semiconductor Nanotubes

scholarly journals Electronic excitation spectra of organic semiconductor/ionic liquid interface by electrochemical attenuated total reflectance spectroscopy

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Ichiro Tanabe ◽  
Iroha Imoto ◽  
Daijiro Okaue ◽  
Masaya Imai ◽  
Shohei Kumagai ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Solar Cells ◽  
Organic Semiconductor ◽  
Field Effect Transistors ◽  
Attenuated Total Reflectance ◽  
Semiconductor Films ◽  
Excitation Spectra ◽  
Total Reflectance ◽  
Spectral Changes ◽  
Electrochemical Devices

AbstractThe interface of organic semiconductor films is of particular importance with respect to various electrochemical devices such as transistors and solar cells. In this study, we developed a new spectroscopic system, namely electrochemical attenuated total reflectance ultraviolet (EC-ATR-UV) spectroscopy, which can access the interfacial area. Ionic liquid-gated organic field-effect transistors (IL-gated OFETs) were successfully fabricated on the ATR prism. Spectral changes of the organic semiconductor were then investigated in relation to the gate voltage application and IL species, and the magnitude of spectral changes was found to correlate positively with the drain current. Additionally, the Stark shifts of not only the organic semiconductor, but also of the IL on the organic semiconductor films were detected. This new method can be applied to other electrochemical devices such as organic thin film solar cells, in which the interfacial region is crucial to their functioning.

Homogenization of Organic Semiconductor Films Formed by Vertical Electro-spray Deposition

2020 ◽  
Vol 140 (4) ◽  
pp. 179-185
Author(s):  
Hiroshi Yamauchi ◽  
Yugo Okada ◽  
Takashi Tadokoro ◽  
Kazuhiro Kudo
Keyword(s):  
Organic Semiconductor ◽  
Spray Deposition ◽  
Semiconductor Films

Energetic Control of Redox-Active Polymers Towards Safe Organic Bioelectronic Materials

2019 ◽  
Author(s):  
Alexander Giovannitti ◽  
Reem B. Rashid ◽  
Quentin Thiburce ◽  
Bryan D. Paulsen ◽  
Camila Cendra ◽  
...  
Keyword(s):  
Molecular Oxygen ◽  
Organic Semiconductors ◽  
Side Reaction ◽  
Semiconducting Polymers ◽  
Side Reactions ◽  
Redox Active ◽  
Donor Acceptor ◽  
Electrochemical Devices ◽  
Biological Environment ◽  
Device Operation

<p>Avoiding faradaic side reactions during the operation of electrochemical devices is important to enhance the device stability, to achieve low power consumption, and to prevent the formation of reactive side‑products. This is particularly important for bioelectronic devices which are designed to operate in biological systems. While redox‑active materials based on conducting and semiconducting polymers represent an exciting class of materials for bioelectronic devices, they are susceptible to electrochemical side‑reactions with molecular oxygen during device operation. We show that this electrochemical side reaction yields hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>), a reactive side‑product, which may be harmful to the local biological environment and may also accelerate device degradation. We report a design strategy for the development of redox-active organic semiconductors based on donor-acceptor copolymers that prevent the formation of H<sub>2</sub>O<sub>2</sub> during device operation. This study elucidates the previously overlooked side-reactions between redox-active conjugated polymers and molecular oxygen in electrochemical devices for bioelectronics, which is critical for the operation of electrolyte‑gated devices in application-relevant environments.</p>

Annealing Behavior with Thickness Hindered Nucleation in Small-Molecule Organic Semiconductor Thin Films

2019 ◽  
Vol 19 (7) ◽  
pp. 3777-3784
Author(s):  
Jakub Rozbořil ◽  
Katharina Broch ◽  
Roland Resel ◽  
Ondřej Caha ◽  
Filip Münz ◽  
...  
Keyword(s):  
Thin Films ◽  
Small Molecule ◽  
Organic Semiconductor ◽  
Annealing Behavior ◽  
Semiconductor Thin Films
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