Single-component organic conductors based on neutral radicals containing the pyrazino-TCNQ skeleton
摘要:
Pyrazino-TCNQ (1a) prepared from 5,8-diiodoquinoxaline (4a) is, like TCNQ itself, a strong electron acceptor and gives a stable anion radical salt as well as highly conductive charge-transfer crystals with donors. Substituted derivatives 1b-i were similarly prepared from 3,6-diiodo-1,2-phenylenediamine (5) as a common intermediate, and bulky substituents such as the phenyl or pyridyl groups have very little effect on either the redox properties or planar geometry of la. Neutral radicals 3d-g derived from pyridyl-substituted derivatives 1d-g, respectively, are open-shell donor-pi-acceptor systems with high electrical amphotericity designed as a new motif for single-component organic conductors. The powder conductivity of 3f was as high as 3.2 X 10(-5) S cm-1.
Structural Design Principle of Small-Molecule Organic Semiconductors for Metal-Free, Visible-Light-Promoted Photocatalysis
作者:Lei Wang、Wei Huang、Run Li、Dominik Gehrig、Paul W. M. Blom、Katharina Landfester、Kai A. I. Zhang
DOI:10.1002/anie.201603789
日期:2016.8.8
on the structural design principle of small‐molecule organic semiconductors as metal‐free, pure organic and visiblelight‐active photocatalysts. Two series of electron‐donor and acceptor‐type organic semiconductor molecules were synthesized to meet crucial requirements, such as 1) absorption range in the visible region, 2) sufficient photoredox potential, and 3) long lifetime of photogenerated excitons
NON-FULLERENE ACCEPTOR COMPOUND CONTAINING BENZOSELENADIAZOLE AND ORGANIC OPTOELECTRONIC DEVICE INCLUDING THE SAME
申请人:RAYNERGY TEK INCORPORATION
公开号:US20210230130A1
公开(公告)日:2021-07-29
The present invention relates to a non-fullerene acceptor compound containing benzoselenadiazole, and organic optoelectronic devices comprising the same.
这项发明涉及一种含苯硒二唑的非富勒烯受体化合物,以及包括该化合物的有机光电子器件。
Deep-Red Electroluminescent Polymers: Synthesis and Characterization of New Low-Band-Gap Conjugated Copolymers for Light-Emitting Diodes and Photovoltaic Devices
作者:Renqiang Yang、Renyu Tian、Jingai Yan、Yong Zhang、Jian Yang、Qiong Hou、Wei Yang、Chi Zhang、Yong Cao
DOI:10.1021/ma047969i
日期:2005.1.1
dominated by narrow-band-gap species and peaked at 670−790 nm, in the range from deep-red to near-infrared (NIR). The external electroluminescent (EL) quantum efficiencies reached 1.1% and 0.3% for devices from these two types of copolymers, respectively. Bulk−heterojunction polymer photovoltaic cells (PPVCs) made from composite thin film of the copolymer 9,9-dioctylfluorene and SeBT (PFO−SeBT) in blend
一系列新的半导体共轭共聚物,衍生自烷基取代的芴,4,7-二硒酚-2'-yl-2,1,3-苯并噻二唑(SeBT)和4,7-二硒酚-2'-yl-2通过钯催化的Suzuki偶联反应,以不同的进料比合成1,3,3-苯并硒二唑(SeBSe)。共聚物的光学带隙非常低,对于SeBT为1.87 eV,对于SeBSe为1.77 eV。观察到从芴链段到窄带隙位点的有效快速能量转移。光致发光和电致发光的发射主要由窄带隙物质控制,并在670-790 nm处达到峰值,范围从深红色到近红外(NIR)。对于这两种类型的共聚物,器件的外部电致发光(EL)量子效率分别达到1.1%和0.3%。61丁酸甲酯(PCBM)作为活性层显示出令人鼓舞的性能。在AM1.5太阳模拟器下(78.2 mW / cm 2),能量转换效率(ECE)高达1%。对于来自PFO-SeBT和PFO-SeBSe的PPVC,光谱响应分别扩展到675和750 nm。
Third-order nonlinear optical properties of 3,4-ethylenedioxythiophene copolymers with chalcogenadiazole acceptors
energy band structure of the copolymers, quantum-chemical calculation using density functional theory was carried out. The alternating insertion of the chalcogenadiazole unit in the PEDOT (poly(3,4-ethylenedioxythiophene)) lowers the HOMO and LUMO energy levels. As a result, the polymers with a lower bandgap compared to that of the homopolymer, PEDOT, were obtained. Optical and electrochemical results
通过直接芳基化反应设计和合成了两种基于3,4-乙撑二氧噻吩(EDOT)的低带隙供体-受体(DA)共轭共聚物,其中HOMO-LUMO间隙可通过常规插入电子缺陷单元进行微调分别为2,1,3-苯并噻二唑(BTZ)和2,1,3-苯并硒二唑(BTSe)。结构表征是通过FT-IR [ 1]1 H NMR和XPS。为了研究共聚物的能带结构的变化,使用密度泛函理论进行了量子化学计算。硫属二唑单元在PEDOT(聚(3,4-乙撑二氧噻吩))中的交替插入降低了HOMO和LUMO的能级。结果,获得了与均聚物PEDOT相比具有较低带隙的聚合物。光学和电化学结果证实,在基于EDOT的供体-受体交替共聚物中,BTSe略优于BTZ。与B3LYP水平相比,本实验结果与HSE06水平理论计算具有很好的相关性。ž扫描实验表明,该共聚物表现出很强的非线性吸收系数和约10 -10 esu的非线性折射率,并且三阶非线性磁化率约为10
Effect of single atom substitution in benzochalcogendiazole acceptors on the performance of ternary memory devices
Ternary memory storage performances of three benzochalcogendiazole derivative based devices clearly demonstrate the effect of single atom substitution on the molecular planarity, film morphologies and device threshold voltages.