Donor–acceptor type silole compounds with aggregation-induced deep-red emission enhancement: synthesis and application for significant intensification of near-infrared photoluminescence

2011 ◽  
Vol 47 (14) ◽  
pp. 4276 ◽  
Author(s):  
Xiaobo Du ◽  
Zhi Yuan Wang
Keyword(s):  
Near Infrared ◽  
Red Emission ◽  
Emission Enhancement ◽  
Donor Acceptor ◽  
Significant Intensification

[1,2,5]Chalcogenodiazolo[3,4-c]pyridine and selenophene based donor–acceptor–donor electrochromic polymers electrosynthesized from high fluorescent precursors

2016 ◽  
Vol 40 (10) ◽  
pp. 8316-8323 ◽  
Author(s):  
Baoyang Lu ◽  
Shouli Ming ◽  
Kaiwen Lin ◽  
Shijie Zhen ◽  
Hongtao Liu ◽  
...  
Keyword(s):  
Near Infrared ◽  
Emission Characteristics ◽  
Red Emission ◽  
Electrochromic Polymers ◽  
Donor Acceptor

Two selenophene precursors, exhibiting yellow and red emission characteristics, were electropolymerized at low potentials to form the near-infrared electrochromic films.

scholarly journals Donor–acceptor–acceptor-type near-infrared fluorophores that contain dithienophosphole oxide and boryl groups: Effect of the boryl group on the nonradiative decay

2021 ◽  
Author(s):  
Yoshiaki Sugihara ◽  
Naoto Inai ◽  
Masayasu Taki ◽  
Thomas Baumgartner ◽  
Ryosuke Kawakami ◽  
...  
Keyword(s):  
Near Infrared ◽  
Effective Strategy ◽  
Nonradiative Decay ◽  
Donor Acceptor

he use of donor–π–acceptor (D–π–A) skeletons is an effective strategy for the design of fluorophores with red-shifted emission. In particular, the use of amino and boryl moieties as the electron-donating...

A small bandgap (3E,7E)-3,7-bis(2-oxoindolin-3-ylidene)benzo[1,2-b:4,5-b′]difuran-2,6(3H,7H)-dione (IBDF) based polymer semiconductor for near-infrared organic phototransistors

2017 ◽  
Vol 5 (46) ◽  
pp. 12163-12171 ◽  
Author(s):  
Yinghui He ◽  
Jesse T. E. Quinn ◽  
Dongliang Hou ◽  
Jenner H.L. Ngai ◽  
Yuning Li
Keyword(s):  
Band Gap ◽  
Near Infrared ◽  
Infrared Light ◽  
Near Infrared Light ◽  
Polymer Semiconductor ◽  
Donor Acceptor ◽  
Small Band

A novel small bandgap donor–acceptor polymer with a very small band gap of 0.95 eV shows promising photoresponse under near infrared light in phototransistors.

scholarly journals Molecular insertion regulates the donor-acceptor interactions in cocrystals for the design of piezochromic luminescent materials

2021 ◽  
Author(s):  
Chunguang Zhai ◽  
Xiu Yin ◽  
Shifeng Niu ◽  
Mingguang Yao ◽  
Shuhe Hu ◽  
...  
Keyword(s):  
Intermolecular Interactions ◽  
Luminescent Properties ◽  
Blue Shift ◽  
Luminescent Materials ◽  
Conformation Change ◽  
Emission Enhancement ◽  
Donor Acceptor ◽  
Fine Manipulation

Abstract Developing a universal strategy to design new piezochromic luminescent materials with desirable properties remains challenging. Here, we report that insertion of a non-emissive molecule into a donor (perylene) and acceptor (TCNB) binary cocrystal can realize fine manipulation of intermolecular interactions between perylene and TCNB for desirable piezochromic luminescent properties. A continuous pressure-induced emission enhancement up to 3 GPa and a blue shift from 655 nm to 619 nm have been observed in perylene-TCNB cocrystals upon THF insertion, in contrast to the red-shifted and quenched emission observed when compressing perylene-TCNB cocrystals and other cocrystals reported earlier. By combining experiment with theory, it is further revealed that the inserted non-emissive THF forms blue-shifted H-bonds with neighboring TCNB molecules and promote a conformation change of perylene molecules upon compression, causing the blue-shifted and enhanced emission. This strategy remains valid when inserting other molecules as non-emissive component into perylene-TCNB cocrystals for abnormal piezochromic luminescent behaviors. Our strategy could also be extended to other cocrystals with different donor-acceptor components, opening a new way for designing novel piezochromic luminescent materials for future applications.

Efficient near-infrared organic light-emitting diodes based on a bipolar host

2018 ◽  
Vol 6 (6) ◽  
pp. 1407-1412 ◽  
Author(s):  
Yun Hu ◽  
Yi Yuan ◽  
Ying-Li Shi ◽  
Jiu-Dong Lin ◽  
Zuo-Quan Jiang ◽  
...  
Keyword(s):  
Near Infrared ◽  
Light Emitting Diodes ◽  
Emission Peak ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Type Host ◽  
Organic Light ◽  
Donor Acceptor

A maximum EQE of 2.7% with an emission peak of 735 nm was achieved by employing a donor–acceptor type host 5-(4-(diphenylamino)phenyl)acenaphthylene-1,2-dione (ADO-TPA).

Upconversion lanthanide nanomaterials: basics introduction, synthesis approaches, mechanism and application in photodetector and photovoltaic devices

2021 ◽  
Author(s):  
Baharak Mehrdel ◽  
Ali Nikbakht ◽  
Azlan Abdul Aziz ◽  
Mahmood S. Jameel ◽  
Mohammed Ali Dheyab ◽  
...  
Keyword(s):  
Optical Properties ◽  
Near Infrared ◽  
Surface Passivation ◽  
Upconversion Emission ◽  
High Energy ◽  
Photovoltaic Devices ◽  
Plasmonic Enhancement ◽  
Host Matrix ◽  
Emission Enhancement ◽  
Improved Performance

Abstract Upconversion (UC) of lanthanide-doped nanostructure has the unique ability to convert low energy infrared (IR) light to high energy photons, which has significant potential for energy conversion applications. This review concisely discusses the basic concepts and fundamental theories of lanthanide nanostructures, synthesis techniques, and enhancement methods of upconversion for photovoltaic and for near-infrared (NIR) photodetector application. In addition, a few examples of lanthanide-doped nanostructures with improved performance were discussed, with particular emphasis on upconversion emission enhancement using coupling plasmon. The use of UC materials has been shown to significantly improve the NIR light-harvesting properties of photovoltaic devices and photocatalytic materials. However, the inefficiency of UC emission also prompted the need for additional modification of the optical properties of UC material. This improvement entailed the proper selection of the host matrix and optimization of the sensitizer and activator concentrations, followed by subjecting the UC material to surface-passivation, plasmonic enhancement, or doping. As expected, improving the optical properties of UC materials can lead to enhanced efficiency of photodetectors and photovoltaic devices.

Donor–Acceptor Dihydropyrenes Switchable with Near-Infrared Light

2020 ◽  
Vol 142 (27) ◽  
pp. 11857-11864 ◽  
Author(s):  
Kristin Klaue ◽  
Wenjie Han ◽  
Pauline Liesfeld ◽  
Fabian Berger ◽  
Yves Garmshausen ◽  
...  
Keyword(s):  
Near Infrared ◽  
Infrared Light ◽  
Near Infrared Light ◽  
Donor Acceptor

scholarly journals Improving Upconversion Efficiency Based on Cross-Patterned Upconversion Material Slot Waveguides on a Silicon Layer

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 520
Author(s):  
Youngsoo Kim ◽  
Kihwan Moon ◽  
Young Lee ◽  
Seokhyeon Hong ◽  
Soon-Hong Kwon
Keyword(s):  
Near Infrared ◽  
Double Resonance ◽  
Silicon Layer ◽  
Optical Devices ◽  
Semiconductor Layer ◽  
Slot Waveguide ◽  
Nir Light ◽  
Emission Enhancement ◽  
Nir Absorption ◽  
Array Structure

Upconversion (UC) materials can be used to harvest near-infrared (NIR) light and convert it into visible light. Although this improves optical device operating spectral range and efficiency, e.g., solar cells, typical UC material conversion efficiency is too low for practical devices. We propose a cross-patterned slot waveguide constructed from UC material embedded in a high index semiconductor layer to improve UC. Since the slot waveguide mode is induced in the low index UC slot, NIR absorption (~970 nm) increased 25-fold compared with film structures. Furthermore, the spontaneous emission enhancement rate at 660 nm increased 9.6-fold compared to the reference film due to resonance excited in the UC slot (Purcell effect). Thus, the proposed UC slot array structure improved UC efficiency 240-fold considering absorption and emission enhancements. This double resonance UC improvement can be applied to practical optical devices.

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