behavior upon electrochemical reduction. Moreover, all molecules in the neutral state showed a strong tendency to aggregate in a binary solvent, as confirmed by optical spectral measurements. To investigate such self‐assembly behavior, a phase‐transfer method with a dichloromethane/methanol (2:3) binary solvent system was used to prepare the nanostructures. By means of atomic force microscopy, transmission
End-Capping Groups for Small-Molecule Organic Semiconducting Materials: Synthetic Investigation and Photovoltaic Applications through Direct C-H (Hetero)arylation
作者:Te-Jui Lu、Po-Han Lin、Kun-Mu Lee、Ching-Yuan Liu
DOI:10.1002/ejoc.201601257
日期:2017.1.3
A Pd-catalyzedC–H (hetero)arylation methodology has been optimized for the efficient synthesis of various useful end-capping groups that are widely applied in small-molecule optoelectronic materials. We report herein the synthesis of a broad scope of target molecules ranging from donor-type through acceptor-type to hybrid-type end-capping groups. To demonstrate their application in dye-sensitized
Synthesis, Characterization, and Photovoltaic Properties of 4,8-Dithienylbenzo[1,2-<i>b</i>:4,5-<i>b</i>′]dithiophene-Based Donor–Acceptor Polymers with New Polymerization and 2D Conjugation Extension Pathways: A Potential Donor Building Block for High Performance and Stable Inverted Organic Solar Cells
作者:Nallan Chakravarthi、Kumarasamy Gunasekar、Chang Su Kim、Dong-Ho Kim、Myungkwan Song、Young Geun Park、Jin Yong Lee、Yurim Shin、In-Nam Kang、Sung-Ho Jin
DOI:10.1021/acs.macromol.5b00115
日期:2015.4.28
structure, we first report the synthesis of three newπ-conjugatedpolymers, P1, P2, and P3, with a modified DTBDT building block as a donor unit. This modification results in newpolymerization and 2D conjugation extension pathways for the polymers through the thiophenes linked to the benzene core of DTBDT and through the thiophenes fused to the phenyl core of the DTBDT, respectively (dithienylbenzene-directed
在所有先前报道的4,8-二噻吩并苯并[1,2- b:4,5- b ']二噻吩(DTBDT)基π共轭聚合物中,聚合和二维(2D)共轭扩展途径均通过噻吩分别与DTBDT的苯基核稠合并且通过噻吩与DTBDT的苯核稠合(BDT定向的DTBDT)。在此,为了发现在供体-受体交替聚合物结构中引入DTBDT基序的另一种可能方法,我们首先报告了三种新的π共轭聚合物P1,P2和P3的合成,并以修改后的DTBDT构造块作为供体单元。这种修饰导致聚合物分别通过与DTBDT的苯核连接的噻吩和与DTBDT的苯核稠合的噻吩(二噻吩基苯定向的DTBDT)产生新的聚合和2D共轭延伸途径。尽管DTBDT的这些修饰的聚合途径导致沿二噻吩基苯方向的离域共轭较少,但光学和电化学性质表明,二噻吩基苯定向的DTBDT的电子给体性质足以产生强大的分子内电荷转移(ICT)并保持较低的高空气稳定性的最高占据分子轨道(HOMO)能级(−5.21至-5
Synthesis, characterization and photovoltaic properties of azadipyrromethene-based acceptors: effect of pyrrolic substituents
A structure–property study of non-fullerene acceptors based on azadipyrromethene derivatives was performed. Power conversion efficiencies between 2 and 4% were obtained when blended with poly(3-hexylthiophene) as the donor.