scholarly journals Exciton funneling in light-harvesting organic semiconductor microcrystals for wavelength-tunable lasers

2019 ◽  
Vol 5 (6) ◽  
pp. eaaw2953 ◽  
Author(s):  
Kang Wang ◽  
Zhenhua Gao ◽  
Wei Zhang ◽  
Yongli Yan ◽  
Hongwei Song ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
High Performance ◽  
Light Harvesting ◽  
Energy Levels ◽  
Lasing Wavelength ◽  
Excitation Light ◽  
Organic Solid ◽  
Harvesting Systems ◽  
P Type ◽  
Ct Complexes

Organic solid-state lasers are essential for various photonic applications, yet current-driven lasing remains a great challenge. Charge transfer (CT) complexes formed with p-/n-type organic semiconductors show great potential in electrically pumped lasers, but it is still difficult to achieve population inversion owing to substantial nonradiative loss from delocalized CT states. Here, we demonstrate the lasing action of CT complexes based on exciton funneling in p-type organic microcrystals with n-type doping. The CT complexes with narrow bandgap were locally formed and surrounded by the hosts with high-lying energy levels, which behave as artificial light-harvesting systems. Excitation light energy captured by the hosts was delivered to the CT complexes, functioning as exciton funnels to benefit lasing actions. The lasing wavelength of such composite microcrystals was further modulated by varying the degree of CT. The results offer a comprehensive understanding of exciton funneling in light-harvesting systems for the development of high-performance organic lasing devices.

High-Performance n-type Organic Semiconductors: Incorporating Specific Electron-Withdrawing Motifs to Achieve Tight Molecular Stacking and Optimized Energy Levels

2012 ◽  
Vol 24 (7) ◽  
pp. 911-915 ◽  
Author(s):  
Sun Woo Yun ◽  
Jong H. Kim ◽  
Seunghoon Shin ◽  
Hoichang Yang ◽  
Byeong-Kwan An ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
High Performance ◽  
Energy Levels ◽  
Molecular Stacking

scholarly journals 2,2'-(Arylenedivinylene)bis-8-hydroxyquinolines exhibiting aromatic π-π stacking interactions as solution-processable p-type organic semiconductors for high-performance organic field effect transistors

2021 ◽  
Author(s):  
Suman Yadav ◽  
Shivani Sharma ◽  
Satinder K Sharma ◽  
Chullikkattil P. Pradeep
Keyword(s):  
Organic Semiconductors ◽  
Field Effect ◽  
High Performance ◽  
Field Effect Transistor ◽  
Field Effect Transistors ◽  
Organic Field Effect Transistors ◽  
Organic Thin Film ◽  
Effect Transistor ◽  
Solution Processable ◽  
P Type

Solution-processable organic semiconductors capable of functioning at low operating voltages (~5 V) are in demand for organic field-effect transistor (OFET) applications. Exploration of new classes of compounds as organic thin-film...

scholarly journals Effects of the Electron-Deficient Third Components in n-Type Terpolymers on Morphology and Performance of All-Polymer Solar Cells

2020 ◽  
Vol 02 (03) ◽  
pp. 214-222
Author(s):  
Bin Liu ◽  
Huiliang Sun ◽  
Chang Woo Koh ◽  
Mengyao Su ◽  
Bao Tu ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
Noncovalent Interactions ◽  
Polymer Solar Cells ◽  
Energy Levels ◽  
Building Blocks ◽  
The Third ◽  
Donor Acceptor ◽  
And Performance ◽  
P Type

Compared with p-type terpolymers, less effort has been devoted to n-type analogs. Herein, we synthesized a series of n-type terpolymers via incorporating three electron-deficient third components including thienopyrroledione (TPD), phthalimide, and benzothiadiazole into an imide-functionalized parent n-type copolymer to tune optoelectronic properties without sacrificing the n-type characteristics. Due to effects of the third components with different electron-accepting ability and solubility, the resulting three polymers feature distinct energy levels and crystallinity. In addition, heteroatoms (S, O, and N) attached on the third components trigger intramolecular noncovalent interactions, which can increase molecule planarity and have a significant effect on the packing structures of the polymer films. As a result, the best power conversion efficiency of 8.28% was achieved from all-polymer solar cells (all-PSCs) based on n-type terpolymer containing TPD. This is contributed by promoted electron mobility and face-on polymer packing, showing the pronounced advantages of the TPD used as a third component for thriving efficient n-type terpolymers. The generality is also successfully validated in a benchmark polymer donor/acceptor system by introducing TPD into the benchmark n-type polymer N2200. The results demonstrate the feasibility of introducing suitable electron-deficient building blocks as the third components for high-performance n-type terpolymers toward efficient all-PSCs.

scholarly journals Remarkable charge-transfer mobility from [6] to [10]phenacene as a high performance p-type organic semiconductor

2018 ◽  
Vol 20 (13) ◽  
pp. 8658-8667 ◽  
Author(s):  
Thao P. Nguyen ◽  
P. Roy ◽  
Ji Hoon Shim
Keyword(s):  
Density Functional Theory ◽  
Charge Transfer ◽  
Organic Semiconductors ◽  
High Performance ◽  
Density Functional ◽  
Dft Calculation ◽  
High Efficiency ◽  
Electronic Devices ◽  
Functional Theory ◽  
P Type

A density functional theory (DFT) calculation predicts phenacene as one of the most promising organic semiconductors for high efficiency electronic devices.

scholarly journals Exploring the Critical Thickness of Organic Semiconductor Layer for Enhanced Piezoresistive Sensitivity in Field-Effect Transistor Sensors

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1583 ◽  
Author(s):  
Damien Thuau ◽  
Katherine Begley ◽  
Rishat Dilmurat ◽  
Abduleziz Ablat ◽  
Guillaume Wantz ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Organic Semiconductor ◽  
Field Effect ◽  
High Performance ◽  
Critical Thickness ◽  
Field Effect Transistors ◽  
Mechanical Strain ◽  
Semiconductor Layer ◽  
Organic Field Effect Transistors ◽  
P Type

Organic semiconductors (OSCs) are promising transducer materials when applied in organic field-effect transistors (OFETs) taking advantage of their electrical properties which highly depend on the morphology of the semiconducting film. In this work, the effects of OSC thickness (ranging from 5 to 15 nm) on the piezoresistive sensitivity of a high-performance p-type organic semiconductor, namely dinaphtho [2,3-b:2,3-f] thieno [3,2–b] thiophene (DNTT), were investigated. Critical thickness of 6 nm thin film DNTT, thickness corresponding to the appearance of charge carrier percolation paths in the material, was demonstrated to be highly sensitive to mechanical strain. Gauge factors (GFs) of 42 ± 5 and −31 ± 6 were measured from the variation of output currents of 6 nm thick DNTT-based OFETs engineered on top of polymer cantilevers in response to compressive and tensile strain, respectively. The relationship between the morphologies of the different thin films and their corresponding piezoresistive sensitivities was discussed.

Thiophene-S,S-dioxidized indophenines as high performance n-type organic semiconductors for thin film transistors

RSC Advances ◽  
2016 ◽  
Vol 6 (51) ◽  
pp. 45410-45418 ◽  
Author(s):  
Yunfeng Deng ◽  
Bin Sun ◽  
Jesse Quinn ◽  
Yinghui He ◽  
Jackson Ellard ◽  
...  
Keyword(s):  
Thin Film ◽  
Organic Semiconductors ◽  
Electron Mobility ◽  
Thin Film Transistors ◽  
High Performance ◽  
Energy Levels ◽  
High Electron ◽  
High Electron Mobility ◽  
Type Semiconductor

Three thiophene-S,S-dioxidized indophenines with deep frontier energy levels are synthesized from isatins and thiophene, which exhibit n-type semiconductor performance with high electron mobility of up to 0.11 cm2 V−1 s−1 in thin film transistors.

scholarly journals High-performance and stable photoelectrochemical water splitting cell with organic-photoactive-layer-based photoanode

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Je Min Yu ◽  
Jungho Lee ◽  
Yoon Seo Kim ◽  
Jaejung Song ◽  
Jiyeon Oh ◽  
...  
Keyword(s):  
Water Splitting ◽  
Organic Semiconductors ◽  
High Performance ◽  
Energy Levels ◽  
Photocurrent Density ◽  
Hydrogen Electrode ◽  
Photoactive Layer ◽  
Onset Potential ◽  
The Stability ◽  
Double Hydroxides

Abstract Considering their superior charge-transfer characteristics, easy tenability of energy levels, and low production cost, organic semiconductors are ideal for photoelectrochemical (PEC) hydrogen production. However, organic-semiconductor-based photoelectrodes have not been extensively explored for PEC water-splitting because of their low stability in water. Herein, we report high-performance and stable organic-semiconductors photoanodes consisting of p-type polymers and n-type non-fullerene materials, which is passivated using nickel foils, GaIn eutectic, and layered double hydroxides as model materials. We achieve a photocurrent density of 15.1 mA cm−2 at 1.23 V vs. reversible hydrogen electrode (RHE) with an onset potential of 0.55 V vs. RHE and a record high half-cell solar-to-hydrogen conversion efficiency of 4.33% under AM 1.5 G solar simulated light. After conducting the stability test at 1.3 V vs. RHE for 10 h, 90% of the initial photocurrent density are retained, whereas the photoactive layer without passivation lost its activity within a few minutes.

scholarly journals Carbonyl-Terminated Quinoidal Oligothiophenes as p-Type Organic Semiconductors

Materials ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 3020
Author(s):  
Takato Asoh ◽  
Kohsuke Kawabata ◽  
Kazuo Takimiya
Keyword(s):  
Organic Semiconductors ◽  
Field Effect Transistors ◽  
Theoretical Calculations ◽  
Energy Levels ◽  
Hole Mobility ◽  
Hole Transport ◽  
Large Contribution ◽  
Theoretical Predictions ◽  
Reorganization Energies ◽  
P Type

A series of quinoidal oligothiophenes terminated with carbonyl groups (nTDs, n = 2–4) are studied as p-type organic semiconductors for the active materials in organic field-effect transistors (OFETs) both by the theoretical and experimental approaches. The theoretical calculations clearly show their high-lying highest occupied molecular orbital (HOMO) energy levels (EHOMOs), small reorganization energies for hole transport (λholes), and large contribution of sulfur atoms to HOMOs, all of which are desirable for p-type organic semiconductors. Thus, we synthesized nTDs from the corresponding aromatic oligothiophene precursors and then evaluated their physicochemical properties and structural properties. These experimental evaluations of nTDs nicely proved the theoretical predictions, and the largest 4TDs in the series (4,4′′′-dihexyl- and 3′,4,4″,4′′′-tetrahexyl-5H,5′′′H-[2,2′:5′,2″:5″,2′′′-quaterthiophene]-5,5′′′-dione) can afford solution-processed OFETs showing unipolar p-type behaviors and hole mobility as high as 0.026 cm2 V−1 s−1.

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