- Synthesis and characterization of new asymmetric thieno[3,4-b]pyrazine-based D?π?A?A type small molecular donors with near-infrared absorption and their photovoltaic applications
-
Two new asymmetric D?π?A1?A2 configured small molecules named PTP and TTP bearing thieno[3,4-b]pyrazine (TP) unit as the A1 group have been designed and synthesized for solution-processed bulk-heterojunction organic solar cells (OSCs). These new dipolar molecular donors not only exhibit strong near-IR absorption but pack into antiparallel dimers, in which PTP shows a coexistence of coplanar and cofacial antiparallel dimers configuration, while TTP reveals a coplanar centrosymmetric dimer structure. Solution-processed OSCs for PTP blended with pristine C70 achieves a promising power conversion efficiency (PCE) of 3.40% along with an open-circuit voltage (VOC) of 0.64 V, a short-circuit current density (JSC) of 9.83 mA cm?2 and a fill factor (FF) of 54.0%, which is the highest efficiency to date among the TP-based materials. Conversely, the optimized TTP:C70 solar cell delivers a VOC of 0.48 V, a JSC of 6.02 mA cm?2 and a FF of 43.3%, corresponding to a moderate PCE of 1.25%.
- Chou, Shu-Hua,Chen, Hsieh-Chih,Wang, Chun-Kai,Chung, Chin-Lung,Hung, Chieh-Ming,Hsu, Jung-Chun,Wong, Ken-Tsung
-
-
Read Online
- Donor/π-Bridge Manipulation for Constructing a Stable NIR-II Aggregation-Induced Emission Luminogen with Balanced Phototheranostic Performance**
-
Owing to their versatile functionality and tunable energy dissipation, aggregation-induced emission luminogens (AIEgens) have emerged as a potential platform for multimodal theranostics. Nevertheless, the construction of AIE-active phototheranostic agents in the second near-infrared window (NIR-II, 1000–1700 nm), which allows superior resolution and minimized photodamage, is still a formidable challenge. Herein, benzo[c]thiophene serves as an electron-rich and bulky donor (D)/π-bridge, which can enlarge the conjugation length and distort the backbone of an AIEgen. By precise D/π-bridge engineering, highly stable NIR-II AIEgen DPBTA-DPTQ nanoparticles are obtained with acceptable NIR-II fluorescence quantum yield and excellent photothermal conversion efficiency. In addition, the spatial conformation of DPBTA-DPTQ is determined for the first time by X-ray single crystal diffraction and theoretical simulations. DPBTA-DPTQ NPs have good biocompatibility and show efficient photothermal therapeutic effects in in vitro tests. Furthermore, DPBTA-DPTQ NPs were used in fluorescence-photoacoustic-photothermal trimodal imaging-guided photothermal eradication of tumors in HepG2 and B16-F10 tumor-xenografted mice.
- Yan, Dingyuan,Xie, Wei,Zhang, Jianyu,Wang, Lei,Wang, Dong,Tang, Ben Zhong
-
supporting information
p. 26769 - 26776
(2021/11/18)
-
- Compound suitable for organic thin-film solar cell and organic thin-film solar cell
-
The present invention discloses a compound suitable for use in an organic thin film solar cell, which has a chemical structure of an electron donating moiety-an electron accepting moiety-an electron accepting moiety (D-A-A), in addition, it exhibits excellent physical properties than conventional active layer materials, such as light absorbing properties, and it is capable of absorbing and converting long-wavelength light. In addition, the present invention also discloses an organic thin film solar cell having the foregoing compound.
- -
-
Paragraph 0066; 0070; 0074; 0076
(2019/04/26)
-
- Photoelectric conversion material and photoelectric conversion element
-
A photoelectric conversion material includes a compound represented by Formula (1), wherein, X is selected from the group consisting of a hydrogen atom, a deuterium atom, a halogen atom, an alkyl group, and a cyano group; and Y represents a monovalent substituent represented by Formula (2), wherein, R1 to R10 each independently represent a hydrogen atom, a deuterium atom, a halogen atom, an alkylgroup, or an aryl group; or two or more of R1 to R10 bond to each other to form one or more rings, and the remainders each independently represent a hydrogen atom, a deuterium atom, a halogen atom, analkyl group, or an aryl group; * denotes the binding site of Y in Formula (1); and Ar1 is selected from the group consisting of structures represented by Formulae (3), wherein ** denotes a binding site of Ar1 with N in Formula (2).
- -
-
Paragraph 0180; 0184; 0185; 0188
(2019/03/10)
-
- The effect of direct amine substituted push-pull oligothiophene chromophores on dye-sensitized and bulk heterojunction solar cells performance
-
The effect of direct amine substitution on the photovoltaic performance of donor-acceptor oligothiophenes in dye-sensitized and bulk heterojunction (BHJ) solar cells was investigated. These dyes have a common donor (di-p-tolylamino), π-bridge (terthiophene), and tunable acceptors to provide new materials for evaluation in dye-sensitized solar cells (DSCs) and BHJ solar cells. They were tested with liquid, ionic liquid, and metal-complex based electrolytes for DSCs and PC61BM for solution processable BHJ solar cells. Direct amine substitution of the oligothiophene resulted in a significant spectral red-shift, reduction in band-gaps and improved photovoltaic performance in DSCs but not for BHJ devices.
- Gupta, Akhil,Armel, Vanessa,Xiang, Wanchun,Fanchini, Giovanni,Watkins, Scott E.,Macfarlane, Douglas R.,Bach, Udo,Evans, Richard A.
-
p. 3584 - 3592
(2013/04/24)
-