The PBDTT–TTz/PC61BM (1 : 2) devices with PFN as the cathode interfacial layer delivered a power conversion efficiency of 2.60% for polymer solar cells.
Quinoxaline-based semiconducting materials are currently of high interest in the field of organic photovoltaics. The number of structural variations employed has been, however, quite limited to date. In this paper we report on the synthesis of a series of quinoxaline monomers and triads with improved optical features. This was achieved by using conjugated linkers, i.e. ethenyl, butadienyl and/or aryl groups, to graft the solubilizing alkyl side chains onto the central quinoxaline core. The influence of the appended groups on the light-harvesting properties of the materials is briefly discussed.
ORGANIC SOLAR CELL AND PHOTODETECTOR MATERIALS AND DEVICES
申请人:The Regents of the University of California
公开号:US20200328357A1
公开(公告)日:2020-10-15
Narrow bandgap n-type small molecules are attracting attention in the near-infrared organic optoelectronics field, due to their easy tunable energy band with a molecular design flexibility. However, only a few reports demonstrate narrow bandgap non-fullerene acceptors (NFAs) that perform well in organic solar cells (OSCs), and the corresponding benefits of NFA photodiodes have not been well investigated in organic photodetectors (OPDs). Here, the ultra-narrow bandgap NFAs CO1-4F, CO1-4Cl and o-IO1 were designed and synthesized for the achieved efficient near-infrared organic photodiodes such as solar cells and photodetectors. Designing an asymmetrical CO1-4F by introducing two different π-bridges including alkylthienyl and alkoxythienyl units ultimately provides an asymmetric A-D′-D-D″-A molecular configuration. This enables a delicate modulation in energy band structure as well as maintains an intense intramolecular charge transfer characteristic of the excited state.
Thiadiazoloquinoxaline and benzodithiophene bearing polymers for electrochromic and organic photovoltaic applications
作者:Serife O. Hacioglu、Emre Ataoglu、Gonul Hizalan、Tolga Depci、Ali Cirpan、Levent Toppare
DOI:10.1080/10426507.2019.1577847
日期:2019.9.2
thiadiazoloquinoxaline unit into the polymer backbone. Both P1 (poly-6,7-bis(3,4-bis(decyloxy)phenyl)-4-(4,8-bis(nonan-3-yloxy)benzo[1,2-b:4,5-b']dithiophen-2-yl)-[1, 2, 5]thiadiazolo[3,4-g]quinoxaline) and P2 (poly- 4-(4,8-bis(5-(nonan-3-yl)thiophen-2-yl)benzo[1,2-b:4,5-b']dithiophen-2-yl)-6,7-bis(3,4-bis(decyloxy)phenyl)-[1, 2, 5]thiadiazolo[3,4-g]quinoxaline) exhibited multichromic behavior with different
摘要 设计并合成了两种新型的噻二唑并喹喔啉和苯并二噻吩(BDT)共聚物。使用不同的 BDT 单元(烷氧基和噻吩取代)作为供体材料,研究了烷氧基和噻吩取代对电化学、光谱电化学和光伏性能的影响。由于缺乏电子的噻二唑并喹喔啉单元插入聚合物主链,两种聚合物均在约 0.90 V 处表现出低氧化电位,在约 1.00 eV 处表现出低光学带隙。P1 (poly-6,7-bis(3,4-bis(decyloxy)phenyl)-4-(4,8-bis(nonan-3-yloxy)benzo[1,2-b:4,5-b)] ']二噻吩-2-基)-[1, 2, 5]噻二唑并[3,4-g]喹喔啉)和P2(聚-4-(4,8-双(5-(壬-3-基)噻吩) -2-基)苯并[1,2-b:4,5-b']二噻吩-2-基)-6,7-双(3,4-双(癸氧基)苯基)-[1, 2, 5 ]噻二唑并[3, 4-g]喹喔啉)分别在中性和完全
Design, synthesis, and characterization of α,ω-disubstituted indeno[1,2-b]fluorene-6,12-dione-thiophene molecular semiconductors. Enhancement of ambipolar charge transport through synthetic tailoring of alkyl substituents
series of indeno[1,2-b]fluorene-6,12-dione-thiophene derivatives with hydrocarbon substituents at α,ω-positions as side groups have been designed and synthesized. The new compounds were fully characterized by 1H/13C NMR, mass spectrometry, cyclic voltammetry, UV-vis absorption spectroscopy, differential scanning calorimetry, thermogravimetric analysis, and melting point measurements. The solid state structure
设计并合成了一系列在α,ω-位为侧基的带有烃基取代基的茚并[1,2 - b ]芴-6,12-二酮-噻吩衍生物。通过1 H / 13 C NMR,质谱,循环伏安,紫外可见吸收光谱,差示扫描量热法,热重分析和熔点测量,对这些新化合物进行了全面表征。茚并[1,2- b]的固态结构基于单晶X射线衍射(XRD)已经鉴定了]芴-6,12-二酮受体核。还使用密度泛函理论计算研究了结构和电子性能,发现它们与实验结果非常吻合,并提供了进一步的见解。研究了烷基链大小和取向对新型半导体的光电性能,分子间内聚力,薄膜微结构和电荷传输性能的详细影响。两种新的可溶液处理的半导体2EH-TIFDKT和2OD-TIFDKT通过以下方式沉积为薄膜通过X射线衍射(XRD)和原子力显微镜(AFM)研究了固溶剪切,滴铸和液滴固定结晶方法及其形态和微观结构。基于溶液处理的薄膜晶体管2EH-TIFDKT和图20D-TIFDKT显示出与电子和空穴迁移率高达双极设备操作为0