Alternating Conjugated Electron Donor–Acceptor Polymers Entailing Pechmann Dye Framework as the Electron Acceptor Moieties for High Performance Organic Semiconductors with Tunable Characteristics

2014 ◽  
Vol 47 (9) ◽  
pp. 2899-2906 ◽  
Author(s):  
Zhengxu Cai ◽  
Hewei Luo ◽  
Penglin Qi ◽  
Jianguo Wang ◽  
Guanxin Zhang ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Electron Donor ◽  
Electron Acceptor ◽  
High Performance ◽  
Donor Acceptor

scholarly journals Inversion of donor–acceptor roles in photoinduced intervalence charge transfers

2019 ◽  
Vol 55 (53) ◽  
pp. 7659-7662 ◽  
Author(s):  
Bruno M. Aramburu-Trošelj ◽  
Paola S. Oviedo ◽  
Ivana Ramírez-Wierzbicki ◽  
Luis M. Baraldo ◽  
Alejandro Cadranel
Keyword(s):  
Electron Donor ◽  
Electron Acceptor ◽  
Ground State ◽  
Mixed Valence ◽  
Donor Acceptor

Upon MLCT photoexcitation, {(tpy)Ru} becomes the electron acceptor in the mixed valence {(tpy˙−)RuIII−δ-NC-MII+δ} moiety, reversing its role as the electron donor in the ground-state mixed valence analogue.

Ultrafast IR spectroscopy of photo-induced electron transfer in self-assembled donor–acceptor coordination cages

2017 ◽  
Vol 19 (21) ◽  
pp. 13596-13603 ◽  
Author(s):  
J. Ahrens ◽  
M. Frank ◽  
G. H. Clever ◽  
D. Schwarzer
Keyword(s):  
Electron Transfer ◽  
Ir Spectroscopy ◽  
Electron Donor ◽  
Electron Acceptor ◽  
Donor Acceptor ◽  
Coordination Cages ◽  
Photo Induced Electron Transfer ◽  
Self Assembled

Photo-excitation of self-assembled palladium based coordination cages consisting of phenothiazine electron donor and anthraquinone electron acceptor ligands produce charge separated states with lifetimes of up to 1.5 ns.

A double B←N bridged bipyridine (BNBP)-based polymer electron acceptor: all-polymer solar cells with a high donor : acceptor blend ratio

2017 ◽  
Vol 1 (5) ◽  
pp. 852-858 ◽  
Author(s):  
Xiaojing Long ◽  
Zicheng Ding ◽  
Chuandong Dou ◽  
Jun Liu ◽  
Lixiang Wang
Keyword(s):  
Solar Cells ◽  
Electron Donor ◽  
Electron Acceptor ◽  
Polymer Solar Cells ◽  
Device Performance ◽  
Blend Ratio ◽  
Donor Acceptor ◽  
Blend Ratios ◽  
High Donor

All-polymer solar cells with P3HT as an electron donor exhibit good device performance with high donor : acceptor blend ratios (w : w, from 0.5 : 1 to 9 : 1).

scholarly journals Constructing Donor-Resonance-Donor Molecules for Acceptor-Free Bipolar Organic Semiconductors

Research ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
He Jiang ◽  
Jibiao Jin ◽  
Zijie Wang ◽  
Wuji Wang ◽  
Runfeng Chen ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
High Performance ◽  
Molecular Design ◽  
Stimuli Responsive ◽  
Light Emitting ◽  
Deep Blue ◽  
Device Structures ◽  
Device Applications ◽  
Donor Acceptor ◽  
Organic Optoelectronic

Organic semiconductors with bipolar transporting character are highly attractive as they offer the possibility to achieve high optoelectronic performance in simple device structures. However, the continual efforts in preparing bipolar materials are focusing on donor-acceptor (D-A) architectures by introducing both electron-donating and electron-withdrawing units into one molecule in static molecular design principles. Here, we report a dynamic approach to construct bipolar materials using only electron-donating carbazoles connected by N-P=X resonance linkages in a donor-resonance-donor (D-r-D) structure. By facilitating the stimuli-responsive resonance variation, these D-r-D molecules exhibit extraordinary bipolar properties by positively charging one donor of carbazole in enantiotropic N+=P-X- canonical forms for electron transport without the involvement of any acceptors. With thus realized efficient and balanced charge transport, blue and deep-blue phosphorescent organic light emitting diodes hosted by these D-r-D molecules show high external quantum efficiencies up to 16.2% and 18.3% in vacuum-deposited and spin-coated devices, respectively. These results via the D-r-D molecular design strategy represent an important concept advance in constructing bipolar organic optoelectronic semiconductors dynamically for high-performance device applications.

scholarly journals Evolution of the electronic structure in open-shell donor-acceptor organic semiconductors

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Zhongxin Chen ◽  
Wenqiang Li ◽  
Md Abdus Sabuj ◽  
Yuan Li ◽  
Weiya Zhu ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Organic Semiconductors ◽  
High Performance ◽  
Closed Shell ◽  
Open Shell ◽  
Ground State Structure ◽  
Structure Property ◽  
System A ◽  
Diradical Character ◽  
Donor Acceptor

AbstractMost organic semiconductors have closed-shell electronic structures, however, studies have revealed open-shell character emanating from design paradigms such as narrowing the bandgap and controlling the quinoidal-aromatic resonance of the π-system. A fundamental challenge is understanding and identifying the molecular and electronic basis for the transition from a closed- to open-shell electronic structure and connecting the physicochemical properties with (opto)electronic functionality. Here, we report donor-acceptor organic semiconductors comprised of diketopyrrolopyrrole and naphthobisthiadiazole acceptors and various electron-rich donors commonly utilized in constructing high-performance organic semiconductors. Nuclear magnetic resonance, electron spin resonance, magnetic susceptibility measurements, single-crystal X-ray studies, and computational investigations connect the bandgap, π-extension, structural, and electronic features with the emergence of various degrees of diradical character. This work systematically demonstrates the widespread diradical character in the classical donor-acceptor organic semiconductors and provides distinctive insights into their ground state structure-property relationship.

Donor–acceptor type conjugated copolymers based on alternating BNBP and oligothiophene units: from electron acceptor to electron donor and from amorphous to semicrystalline

2020 ◽  
Vol 8 (40) ◽  
pp. 20998-21006
Author(s):  
Junhui Miao ◽  
Hongxiang Li ◽  
Tao Wang ◽  
Yanchun Han ◽  
Jun Liu ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Electron Donor ◽  
Electron Acceptor ◽  
Donor Acceptor ◽  
Conjugated Copolymers

A series of D–A type conjugated polymers based on alternating BNBP unit and oligothiophene units of various length were developed and served as from electron acceptor to electron donor.

Resonance-driven dynamically bipolar organic semiconductors for high-performance optoelectronic applications

2020 ◽  
Vol 7 (12) ◽  
pp. 3298-3304
Author(s):  
He Jiang ◽  
Ye Tao ◽  
Jibiao Jin ◽  
Yizhong Dai ◽  
Lijie Xian ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Electron Acceptor ◽  
High Performance ◽  
Optoelectronic Applications

Resonance-driven dynamically bipolar organic semiconductors were designed by using N–C=O resonance variation to transform one carbazole into an electron acceptor in the D-r-D structure. The blue OLEDs hosted by D-r-D materials showed a maximum EQE up to 31.2%.

Corannulene-Based Donor-Acceptor-Type Conjugated Polymers with Electrochromic Properties

2021 ◽  
Author(s):  
Jing-Ju Huang ◽  
Hsing-An Lin ◽  
Chi Chen ◽  
Po-Wen Tang ◽  
Shyh-Chyang Luo
Keyword(s):  
Conjugated Polymers ◽  
Electron Donor ◽  
Electron Acceptor ◽  
Color Change ◽  
Material Research ◽  
Electrochromic Properties ◽  
Electrochromic Material ◽  
Wide Range ◽  
Donor Acceptor

π−Conjugated polymers have received increasing attention in electrochromic material research because their color change can be altered over a wide range by introducing electron-donor (D) and electron-acceptor (A) moieties. In...

Sign in / Sign up

Export Citation Format

Share Document