143746-72-9Relevant articles and documents
Anthradithiophene-benzothiadiazole-based small molecule donors for organic solar cells
Liu, Qida,Liu, Ying,Wang, Yang,Ai, Ling,Ouyang, Xinhua,Han, Lei,Ge, Ziyi
, p. 3627 - 3633 (2013)
A new A-D-A small molecule involving anthradithiophene as a donor and benzothiadiazole as an acceptor unit has been synthesized by Stille coupling reaction. Its thermal, optical and electronic properties, hole mobility and photovoltaic properties have been fully characterized. The resulting material shows a broad absorption range (300-750 nm), a low band gap (1.59 eV) and a moderate hole mobility (8.81 × 10-4 cm2 V -1 s-1). We used the new small molecule blended with PC71BM as the active layer to fabricate solution-processed organic solar cells (OSCs), and employed a variety of post-treatment methods to optimize the device performance. With the help of polar solvent exposure, the highest power conversion efficiency (PCE) of 0.55% was obtained. These results would supply useful information to understand the relationship between molecular structure and photovoltaic properties of anthradithiophene/benzothiadiazole- based OSCs.
Resistance to unwanted photo-oxidation of multi-acene molecules
Thomas, Samuel W. Iii,Yan, Yu,Lamport, Zachary A.,Kymissis, Ioannis
, p. 12731 - 12739 (2020)
Although long acenes remain a key class of π- conjugated molecules for numerous applications, photoinduced oxidation upon exposure of the acene to light, often through sensitization of 1O2, is an important reaction requiring mitigation for most applications. In response to this ongoing challenge, this paper presents a series of four new diarylethynyl-substituted long acenes-three tetracenes and one anthradithiophene-in which the arylene pendants are either benzene, naphthalene, or anthracene. UV/vis and fluorescence spectroscopy reveals that the anthracene-substituted derivatives fluoresce poorly (φ 0.01). Although all four long acenes react with 1O2 at expected rates when an external photosensitizer is included and show the expected changes in fluorescence to accompany these reactions, the anthracene-substituted derivatives resist direct photoinduced oxidation. Through a combination of mechanistic experiments, we conclude that rapid nonradiative decay of the anthracene-substituted derivatives, perhaps because of inter-arene torsions that emerge in theoretical geometry optimizations, makes these compounds poor photosensitizers for 1O2 or other reactive oxygen species. This discovery opens new design possibilities for extended acene structures with improved photochemical stability.
SYNTHESIS OF NEW SMALL MOLECULES/OLIGOMERS WITH HIGH CONDUCTIVITY AND ABSORPTION FOR OPTOELECTRONIC APPLICATION
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Paragraph 0061, (2015/11/23)
Disclosed are semiconducting or conducting organic small molecules and oligomers that contain a central, electron rich, functionalized dihydrodicyclopentylanthracene core (or electron donor core) that is connected to at least one or two comparatively electron deficient monomeric unit or units (or electron acceptor units) that feature group 16 heteroatoms sulfur, selenium or tellurium or combinations thereof. Multiple electron rich cores can be linked together through one or more alkynyl linkages. The small molecules and oligomers can have the following generic structure and can be used in areas such as organic photovoltaic materials..
