Amphiphilic benzothiadiazole–triphenylamine-based aggregates that emit red light in water

2015 ◽  
Vol 13 (6) ◽  
pp. 1818-1828 ◽  
Author(s):  
Tsutomu Ishi-i ◽  
Ikumi Kitahara ◽  
Shimpei Yamada ◽  
Yusuke Sanada ◽  
Kazuo Sakurai ◽  
...  
Keyword(s):  
Light Emission ◽  
Red Light ◽  
Aggregate State ◽  
Donor Acceptor

An amphiphilic donor–acceptor dye can provide red light emission in water in an aggregate state.

Photo-responsive Schottky Diode Behavior of a Donor-Acceptor Co-crystal with Violet Blue Light Emission

CrystEngComm ◽  
2021 ◽  
Author(s):  
Sanjay Kumar ◽  
Soumen Singha ◽  
Rajkumar Jana ◽  
RITUPARNA MONDAL ◽  
Partha Pratim Bag ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Transport Property ◽  
Schottky Diode ◽  
Electronic Transport ◽  
Supramolecular Structure ◽  
Light Emission ◽  
Electronic Transport Property ◽  
Blue Light Emission ◽  
Donor Acceptor ◽  
Diode Behavior

Herein, we report the crystal structure, supramolecular structure, electronic transport property and optoelectronic behaviour of a co-crystal made of tetrabromoterephthalic acid (TBTA) and quinoxaline (QUIN) (1:1). The sample has been...

scholarly journals Incommensurately Modulated Crystal Structure and Photoluminescence Properties of Eu2O3- and P2O5-Doped Ca2SiO4 Phosphor

Materials ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 58
Author(s):  
Hiromi Nakano ◽  
Shota Ando ◽  
Konatsu Kamimoto ◽  
Yuya Hiramatsu ◽  
Yuichi Michiue ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Light Emission ◽  
Red Light ◽  
Basic Unit ◽  
Β Phase ◽  
Stacking Order ◽  
Cell Dimensions ◽  
Incommensurate Modulation ◽  
Unit Cell Dimensions ◽  
Identical Chemical Composition

We prepared four types of Eu2O3- and P2O5-doped Ca2SiO4 phosphors with different phase compositions but identical chemical composition, the chemical formula of which was (Ca1.950Eu3+0.013☐0.037)(Si0.940P0.060)O4 (☐ denotes vacancies in Ca sites). One of the phosphors was composed exclusively of the incommensurate (IC) phase with superspace group Pnma(0β0)00s and basic unit-cell dimensions of a = 0.68004(2) nm, b = 0.54481(2) nm, and c = 0.93956(3) nm (Z = 4). The crystal structure was made up of four types of β-Ca2SiO4-related layers with an interlayer. The incommensurate modulation with wavelength of 4.110 × b was induced by the long-range stacking order of these layers. When increasing the relative amount of the IC-phase with respect to the coexisting β-phase, the red light emission intensity, under excitation at 394 nm, steadily decreased to reach the minimum, at which the specimen was composed exclusively of the IC-phase. The coordination environments of Eu3+ ion in the crystal structures of β- and IC-phases might be closely related to the photoluminescence intensities of the phosphors.

First-principles identification of VI+Cui defect cluster in cuprous iodide: origin of red light photoluminescence

2022 ◽  
Author(s):  
Dingrong Liu ◽  
Zenghua Cai ◽  
Yu-Ning Wu ◽  
Shiyou Chen
Keyword(s):  
First Principles ◽  
Light Emission ◽  
Red Light ◽  
Defect Cluster ◽  
Intrinsic Point Defect ◽  
Long Wavelength ◽  
Type Semiconductor ◽  
Display Technology ◽  
Wavelength Emission ◽  
P Type

Abstract The γ-phase Cuprous Iodide (CuI) emerges as a promising transparent p-type semiconductor for next-generation display technology because of its wide direct band gap, intrinsic p-type conductivity, and high carrier mobility. Two main peaks are observed in its photoluminescence (PL). One is short wavelength (410-430 nm) emission, which is well attributed to the electronic transitions at Cu vacancy, whereas the other long wavelength emission (680-720 nm) has not been fully understood. In this paper, through first-principles simulations, we investigate the formation energies and emission line shape for various defects, and discover that the intrinsic point defect cluster V_I+Cu_i^(2+) is the source of the long wavelength emission. Our finding is further supported by the prediction that the defect concentration decreases dramatically as the chemical condition changes from Cu-rich to I-rich, explaining the significant reduction in the red light emission if CuI is annealed in abundant I environment.

An exceptionally long-lived triplet state of red light-absorbing compact phenothiazine-styrylBodipy electron donor/acceptor dyads: a better alternative to the heavy atom-effect?

2020 ◽  
Vol 56 (11) ◽  
pp. 1721-1724 ◽  
Author(s):  
Yuqi Hou ◽  
Qingyun Liu ◽  
Jianzhang Zhao
Keyword(s):  
Charge Transfer ◽  
Triplet State ◽  
Electron Donor ◽  
Heavy Atom ◽  
Red Light ◽  
Intersystem Crossing ◽  
Spin Orbital ◽  
Heavy Atom Effect ◽  
Donor Acceptor ◽  
Atom Effect

Heavy atom-free dyads showing a red light-absorbing and exceptionally long-lived triplet state based on a spin–orbital charge transfer intersystem crossing mechanism.

Blue, Green, and Red Light Emission of 1,8-Carbazole-based Conjugated Polymers

2010 ◽  
Vol 39 (3) ◽  
pp. 168-169 ◽  
Author(s):  
Tsuyoshi Michinobu ◽  
Haruka Osako ◽  
Kimie Murata ◽  
Kiyotaka Shigehara
Keyword(s):  
Conjugated Polymers ◽  
Light Emission ◽  
Red Light

Supramolecular assembly of dipeptide functionalized benzo[ghi]perylene monoimide directs white light emission via donor–acceptor interactions

RSC Advances ◽  
2015 ◽  
Vol 5 (109) ◽  
pp. 90158-90167 ◽  
Author(s):  
Manoj K. Manna ◽  
Dnyaneshwar B. Rasale ◽  
Apurba K. Das
Keyword(s):  
Energy Transfer ◽  
White Light ◽  
Self Assembly ◽  
Light Emission ◽  
Supramolecular Assembly ◽  
White Light Emission ◽  
Acid Molecule ◽  
Donor Acceptor

Optical and self-assembly nature of an aromatic dipeptide Phe-Phe (FF) functionalized benzo[ghi]perylene monoimide (BPI) are studied. Acceptor BPI-FF-OMe molecule shows white light emission upon energy transfer from donor pyrenebutyric acid molecule.

scholarly journals Light-emitting Ga-oxide nanocrystals in glass: a new paradigm for low-cost and robust UV-to-visible solar-blind converters and UV emitters

Nanoscale ◽  
2014 ◽  
Vol 6 (3) ◽  
pp. 1763-1774 ◽  
Author(s):  
Vladimir N. Sigaev ◽  
Nikita V. Golubev ◽  
Elena S. Ignat'eva ◽  
Alberto Paleari ◽  
Roberto Lorenzi
Keyword(s):  
Light Emission ◽  
Low Cost ◽  
New Paradigm ◽  
Light Emitting ◽  
Solar Blind ◽  
Donor Acceptor ◽  
Uv Emitters ◽  
Kinetics Of

We demonstrate that nano-confinement of donor–acceptor recombination can force a nanophase to follow efficient bimolecular kinetics of light-emission, allowing Ga2O3 nanocrystals to work in glass as unprecedented solar-blind UV-to-visible converters.

High-Efficiency Red-Light Emission from Polyfluorenes Grafted with Cyclometalated Iridium Complexes and Charge Transport Moiety

2003 ◽  
Vol 125 (3) ◽  
pp. 636-637 ◽  
Author(s):  
Xiwen Chen ◽  
Jin-Long Liao ◽  
Yongmin Liang ◽  
M. O. Ahmed ◽  
Hao-En Tseng ◽  
...  
Keyword(s):  
Charge Transport ◽  
High Efficiency ◽  
Light Emission ◽  
Red Light ◽  
Iridium Complexes
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