scholarly journals Origin of poor doping efficiency in solution processed organic semiconductors

2018 ◽  
Vol 9 (19) ◽  
pp. 4468-4476 ◽  
Author(s):  
Ajay Jha ◽  
Hong-Guang Duan ◽  
Vandana Tiwari ◽  
Michael Thorwart ◽  
R. J. Dwayne Miller
Keyword(s):  
Organic Semiconductors ◽  
Memory Effect ◽  
Electronic Spectroscopy ◽  
Precursor Solution ◽  
Charge Carriers ◽  
Electronic Coupling ◽  
Two Dimensional ◽  
Solution Processed ◽  
Doped Polymer

We have employed two-dimensional electronic spectroscopy to reveal detrimental electronic coupling among the ions in precursor solution of molecular-doped polymer, which are retained to the processed films. This memory effect renders the charge carriers to be bound resulting into poor doping efficiency.

scholarly journals Photoexcitation of PbS nanosheets leads to highly mobile charge carriers and stable excitons

Nanoscale ◽  
2019 ◽  
Vol 11 (44) ◽  
pp. 21569-21576 ◽  
Author(s):  
Jannika Lauth ◽  
Michele Failla ◽  
Eugen Klein ◽  
Christian Klinke ◽  
Sachin Kinge ◽  
...  
Keyword(s):  
Charge Carriers ◽  
Two Dimensional ◽  
Mobile Charge ◽  
Solution Processed

Colloidal two-dimensional (2D) PbS nanosheets exhibit stable excitons and highly mobile charge carriers (500–1000 cm2 V−1 s−1) rendering solution-processed nanomaterials suitable for ultrathin optoelectronics.

Vibronic coupling in organic semiconductors for photovoltaics

2017 ◽  
Vol 19 (29) ◽  
pp. 18813-18830 ◽  
Author(s):  
Antonietta De Sio ◽  
Christoph Lienau
Keyword(s):  
Charge Transport ◽  
Organic Semiconductors ◽  
Organic Materials ◽  
Electronic Spectroscopy ◽  
Vibronic Coupling ◽  
Artificial Light ◽  
Two Dimensional

Ultrafast two-dimensional electronic spectroscopy reveals vibronically-assisted coherent charge transport and separation in organic materials and opens up new perspectives for artificial light-to-current conversion.

scholarly journals Solution-Processed, Large-Area, Two-Dimensional Crystals of Organic Semiconductors for Field-Effect Transistors and Phototransistors

2020 ◽  
Vol 6 (5) ◽  
pp. 636-652
Author(s):  
Cong Wang ◽  
Beibei Fu ◽  
Xiaotao Zhang ◽  
Rongjin Li ◽  
Huanli Dong ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Two Dimensional ◽  
Large Area ◽  
Solution Processed

Design and Synthesis of Two-Dimensional Covalent Organic Frameworks with Four-Arm Cores: Prediction of Remarkable Ambipolar Charge-Transport Properties

2019 ◽  
Author(s):  
Simil Thomas ◽  
Hong Li ◽  
Raghunath R. Dasari ◽  
Austin Evans ◽  
William Dichtel ◽  
...  
Keyword(s):  
Charge Transport ◽  
Organic Semiconductors ◽  
Density Functional ◽  
Polymer Networks ◽  
Two Dimensional ◽  
Covalent Organic Frameworks ◽  
X Ray Diffraction ◽  
Zinc Porphyrin ◽  
Design And Synthesis ◽  
Predicted Values

<p>We have considered three two-dimensional (2D) π-conjugated polymer networks (i.e., covalent organic frameworks, COFs) materials based on pyrene, porphyrin, and zinc-porphyrin cores connected <i>via</i> diacetylenic linkers. Their electronic structures, investigated at the density functional theory global-hybrid level, are indicative of valence and conduction bands that have large widths, ranging between 1 and 2 eV. Using a molecular approach to derive the electronic couplings between adjacent core units and the electron-vibration couplings, the three π-conjugated 2D COFs are predicted to have ambipolar charge-transport characteristics with electron and hole mobilities in the range of 65-95 cm<sup>2</sup>V<sup>-1</sup>s<sup>-1</sup>. Such predicted values rank these 2D COFs among the highest-mobility organic semiconductors. In addition, we have synthesized the zinc-porphyrin based 2D COF and carried out structural characterization via powder X-ray diffraction and surface area analysis, which demonstrates the feasability of these electroactive networks.</p>

Solution‐Processed Large‐Scale Concentric‐Ring Laser on Two‐Dimensional Ruddlesden–Popper Perovskites Thin Films

2021 ◽  
pp. 2100193
Author(s):  
Peng Liu ◽  
Bingqian Zhang ◽  
Qing Liao ◽  
Guifen Tian ◽  
Chunling Gu ◽  
...  
Keyword(s):  
Thin Films ◽  
Ring Laser ◽  
Large Scale ◽  
Two Dimensional ◽  
Concentric Ring ◽  
Solution Processed

A Review on Solution-Processed Perovskite/Organic Hybrid Photodetectors

2021 ◽  
Author(s):  
Yadong Wang ◽  
Yingliang Liu ◽  
Shaokui Cao ◽  
Jizheng Wang
Keyword(s):  
Organic Semiconductors ◽  
Next Generation ◽  
Solution Processed ◽  
Organic Hybrid

Both perovskites and organic semiconductors are promising candidates for next-generation portable and wearable photodetectors (PDs), owing to their facile solution processibility and remarkable optoelectronic features. In recent years, there are...

Star-shaped organic semiconductors with planar triazine core and diketopyrrolopyrrole branches for solution-processed small-molecule organic solar cells

2015 ◽  
Vol 115 ◽  
pp. 35-49 ◽  
Author(s):  
Sheng-Yi Shiau ◽  
Chun-Ho Chang ◽  
Wei-Jen Chen ◽  
Hsing-Ju Wang ◽  
Ru-Jong Jeng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Semiconductors ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Solution Processed

scholarly journals Exploring size and state dynamics in CdSe quantum dots using two-dimensional electronic spectroscopy

2014 ◽  
Vol 140 (8) ◽  
pp. 084701 ◽  
Author(s):  
Justin R. Caram ◽  
Haibin Zheng ◽  
Peter D. Dahlberg ◽  
Brian S. Rolczynski ◽  
Graham B. Griffin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electronic Spectroscopy ◽  
Cdse Quantum Dots ◽  
Two Dimensional

scholarly journals Two-dimensional electronic spectroscopy as a tool for tracking molecular conformations in DNA/RNA aggregates

2018 ◽  
Vol 207 ◽  
pp. 233-250 ◽  
Author(s):  
Javier Segarra-Martí ◽  
Vishal K. Jaiswal ◽  
Ana Julieta Pepino ◽  
Angelo Giussani ◽  
Artur Nenov ◽  
...  
Keyword(s):  
Nucleic Acid ◽  
Ground State ◽  
Electronic Spectra ◽  
Crucial Role ◽  
Electronic Spectroscopy ◽  
Two Dimensional ◽  
Molecular Conformations ◽  
Computational Strategy

A computational strategy to simulate two-dimensional electronic spectra (2DES) is introduced, which allows characterising ground state conformations of flexible nucleobase aggregates that play a crucial role in nucleic acid photochemistry.

ITO Thin Films on Silicon Buffer by Sol Gel Method

2006 ◽  
Vol 514-516 ◽  
pp. 1155-1160 ◽  
Author(s):  
Talaat Moussa Hammad
Keyword(s):  
Thin Films ◽  
Indium Tin Oxide ◽  
Optical Transmission ◽  
Sol Gel ◽  
Precursor Solution ◽  
Charge Carriers ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ito Thin Films ◽  
Uv Visible

Sol gel indium tin oxide thin films (In: Sn = 90:10) were prepared by the sol-gel dipcoating process on silicon buffer substrate. The precursor solution was prepared by mixing SnCl2.2H2O and InCl3 dissolved in ethanol and acetic acid. The crystalline structure and grain orientation of ITO films were determined by X-ray diffraction. The surface morphology of the films was characterized by scanning electron microscope (SEM). Optical transmission and reflectance spectra of the films were analyzed by using a UV-visible spectrophotometer. The transport properties of majority charge carriers for these films were studied by Hall measurement. ITO thin film with electrical resistivity of 7.6 ×10-3 3.cm, Hall mobility of approximately 2 cm2(Vs)-1 and free carrier concentration of approximately 4.2 ×1020 cm-3 are obtained for films 100 nm thick films. The I-V curve measurement showed typical I-V characteristic behavior of sol gel ITO thin films.

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