scholarly journals Electrochemically Synthesized Poly(3-hexylthiophene) Nanowires as Photosensitive Neuronal Interfaces

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4761
Author(s):  
Szilveszter Gáspár ◽  
Tiziana Ravasenga ◽  
Raluca-Elena Munteanu ◽  
Sorin David ◽  
Fabio Benfenati ◽  
...  
Keyword(s):  
Organic Solar Cells ◽  
Electrochemical Synthesis ◽  
Cortical Neurons ◽  
Simple Procedure ◽  
Average Diameter ◽  
Retinal Neurons ◽  
Electrophysiological Properties ◽  
Organic Optoelectronic Devices ◽  
Organic Optoelectronic ◽  
Polymer Nanowires

Poly(3-hexylthiophene) (P3HT) is a hole-conducting polymer that has been intensively used to develop organic optoelectronic devices (e.g., organic solar cells). Recently, P3HT films and nanoparticles have also been used to restore the photosensitivity of retinal neurons. The template-assisted electrochemical synthesis of polymer nanowires advantageously combines polymerization and polymer nanostructuring into one, relatively simple, procedure. However, obtaining P3HT nanowires through this procedure was rarely investigated. Therefore, this study aimed to investigate the template-assisted electrochemical synthesis of P3HT nanowires doped with tetrabutylammonium hexafluorophosphate (TBAHFP) and their biocompatibility with primary neurons. We show that template-assisted electrochemical synthesis can relatively easily turn 3-hexylthiophene (3HT) into longer (e.g., 17 ± 3 µm) or shorter (e.g., 1.5 ± 0.4 µm) P3HT nanowires with an average diameter of 196 ± 55 nm (determined by the used template). The nanowires produce measurable photocurrents following illumination. Finally, we show that primary cortical neurons can be grown onto P3HT nanowires drop-casted on a glass substrate without relevant changes in their viability and electrophysiological properties, indicating that P3HT nanowires obtained by template-assisted electrochemical synthesis represent a promising neuronal interface for photostimulation.

A p-π* conjugated triarylborane as an alcohol-processable n-type semiconductor for organic optoelectronic devices

2019 ◽  
Vol 7 (24) ◽  
pp. 7427-7432 ◽  
Author(s):  
Yingjian Yu ◽  
Changshuai Dong ◽  
Abdullah F. Alahmadi ◽  
Bin Meng ◽  
Jun Liu ◽  
...  
Keyword(s):  
Electron Acceptor ◽  
Organic Solar Cells ◽  
Organic Molecule ◽  
Energy Levels ◽  
Optoelectronic Devices ◽  
High Electron ◽  
High Electron Mobility ◽  
Type Semiconductor ◽  
Organic Optoelectronic Devices ◽  
Organic Optoelectronic

A new n-type p-π* conjugated organic molecule based on triarylborane shows unique alcohol-solubility even in the absence of polar side chains. With its low-lying LUMO/HOMO energy levels and high electron mobility, the molecule can be used as electron acceptor in eco-friendly alcohol-processed organic solar cells.

Antisolvent treatment of copper(I) thiocyanate (CuSCN) hole transport layer for efficiency improvements in organic solar cells and light-emitting diodes

2021 ◽  
Author(s):  
Pimpisut Worakajit ◽  
Taweesak Sudyoadsuk ◽  
Vinich Promarak ◽  
Akinori Saeki ◽  
Pichaya Pattanasattayavong
Keyword(s):  
Coordination Polymer ◽  
Organic Solar Cells ◽  
Optoelectronic Devices ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Light Emitting ◽  
Organic Optoelectronic Devices ◽  
Organic Optoelectronic ◽  
Typical Process

Copper(I) thiocyanate (CuSCN) has been widely used as a hole-transport layer in organic optoelectronic devices. However, being a coordination polymer, its solution-processing is not straightforward; the typical process requires sulfide-based...

scholarly journals Revealing molecular conformation–induced stress at embedded interfaces of organic optoelectronic devices by sum frequency generation spectroscopy

2021 ◽  
Vol 7 (16) ◽  
pp. eabf8555
Author(s):  
Zhongwu Wang ◽  
Hongzhen Lin ◽  
Xi Zhang ◽  
Jie Li ◽  
Xiaosong Chen ◽  
...  
Keyword(s):  
Molecular Conformation ◽  
Optoelectronic Devices ◽  
Sum Frequency Generation ◽  
Interface Stress ◽  
Sum Frequency ◽  
Device Stability ◽  
Induced Stress ◽  
Organic Optoelectronic Devices ◽  
Organic Devices ◽  
Organic Optoelectronic

Interface stresses are pervasive and critical in conventional optoelectronic devices and generally lead to many failures and reliability problems. However, detection of the interface stress embedded in organic optoelectronic devices is a long-standing problem, which causes the unknown relationship between interface stress and organic device stability (one key and unsettled issue for practical applications). In this study, a kind of previously unknown molecular conformation–induced stress is revealed at the organic embedded interface through sum frequency generation (SFG) spectroscopy technique. This stress can be greater than 10 kcal/mol per nm2 and is sufficient to induce molecular disorder in the organic semiconductor layer (with energy below 8 kcal/mol per nm2), finally causing instability of the organic transistor. This study not only reveals interface stress in organic devices but also correlates instability of organic devices with the interface stress for the first time, offering an effective solution for improving device stability.

Surface Cleaning Challenges for Organic Light Emitting Diodes

2021 ◽  
Vol 314 ◽  
pp. 3-8
Author(s):  
Noel Giebink
Keyword(s):  
Light Emitting Diodes ◽  
Surface Cleaning ◽  
Organic Light Emitting Diodes ◽  
Large Area ◽  
Light Emitting ◽  
Organic Light ◽  
Organic Optoelectronic Devices ◽  
Soft Thin Film ◽  
Organic Optoelectronic

Organic optoelectronic devices such as light-emitting diodes and solar cells present unique challenges for surface cleaning and preparation because of their large area and the ‘soft’, thin film nature of the materials involved. This paper gives an introduction to this class of semiconductor devices and covers a recent example of how surface cleaning impacts the long-term reliability of organic light-emitting diodes being commercialized for solid-state lighting.

scholarly journals Efficient Solution-Processed Blue and Yellow Phosphorescent Organic Light-emitting Diodes Using Binary Blend Hosts

2021 ◽  
Author(s):  
Yuxin GUAN ◽  
Wenjing LIN ◽  
Qiannan WANG ◽  
Pengchao ZHOU ◽  
Bin WEI ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Binary Blend ◽  
Solution Processed ◽  
Light Emitting ◽  
Organic Light ◽  
Single Host ◽  
Organic Optoelectronic Devices ◽  
Overall Performance ◽  
Organic Optoelectronic

The appropriate hosts of emitting layers (EMLs) play an important role in determining the overall performance of solution-processed phosphorescent organic light emitting diodes (PhOLEDs). We have investigated the effect of three species of host molecules, 1,3-bis(carbazol-9-yl)benzene (mCP), 10-(4-(5,5dimethylbenzofuro[3,2-c]acridin-13(5H)-yl)phenyl)-10-phenylanthracen-9(10H)-one (DpAn-5BzAc) and poly(9-vinylcarbazole) (PVK), on the performance of solution-processed blue and yellow PhOLEDs. We have found that compared to the widely used single-host EMLs, the devices using the binary blend of mCP: DpAn5BzAc as hosts, can achieve more efficient optoelectrical characteristics. The maximum current efficiencies of 11.84 and 16.61 have been realized for blue and yellow OLEDs, respectively. The superior electroluminescence performance for binary blend host-based PhOLEDs was attributed to the enhanced charge carrier balance and multi-component miscibility, which has a dramatic influence on the morphology of the emissive layer. These results demonstrate the great potential of the multi-hosts in solution-processed organic optoelectronic devices. The development of complementary colour OLEDs with blue and yellow can provide a simple approach to fabricate solution-processed white PhOLEDs.

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