- Organic light-emitting material containing benzo[c][1,2,5]thiadiazole derivative receptor structural unit and application
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The invention provides an organic light-emitting material based on a donor-receptor structure of a benzo[c][1,2,5]thiadiazole-4-aldehyde group receptor and a 2-(benzo[c][1,2,5]thiadiazole-4-methylene)malononitrile receptor and application thereof. The organic light-emitting material is a receptor-donor separation system, wherein the receptor is benzo[c][1,2,5]thiadiazole-4-aldehyde or 2-(benzo[c][1,2,5]thiadiazole-4-methylene) malononitrile, and a donor is carbazole and a derivative or benzoxazine and the like. The lowest unoccupied molecular orbital (LUMO) in the material is located in the receptor, and the highest occupied molecular orbital (HOMO) in the material is located in the donor, so that the molecular orbital energy level of the luminescent material can be effectively regulated and controlled through electrical regulation of the receptor structure and the donor. By regulating and controlling the structure of the light-emitting material or the electron donating capability of the donor, the light-emitting color of material molecules can be conveniently regulated. The organic light-emitting material has the characteristic that the light-emitting color is easy to adjust, andcan be used as a light-emitting material for preparing an OLED device.
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- A rhodanine flanked nonfullerene acceptor for solution-processed organic photovoltaics
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A novel small molecule, FBR, bearing 3-ethylrhodanine flanking groups was synthesized as a nonfullerene electron acceptor for solution-processed bulk heterojunction organic photovoltaics (OPV). A straightforward synthesis route was employed, offering the potential for large scale preparation of this material. Inverted OPV devices employing poly(3-hexylthiophene) (P3HT) as the donor polymer and FBR as the acceptor gave power conversion efficiencies (PCE) up to 4.1%. Transient and steady state optical spectroscopies indicated efficient, ultrafast charge generation and efficient photocurrent generation from both donor and acceptor. Ultrafast transient absorption spectroscopy was used to investigate polaron generation efficiency as well as recombination dynamics. It was determined that the P3HT:FBR blend is highly intermixed, leading to increased charge generation relative to comparative devices with P3HT:PC60BM, but also faster recombination due to a nonideal morphology in which, in contrast to P3HT:PC60BM devices, the acceptor does not aggregate enough to create appropriate percolation pathways that prevent fast nongeminate recombination. Despite this nonoptimal morphology the P3HT:FBR devices exhibit better performance than P3HT:PC60BM devices, used as control, demonstrating that this acceptor shows great promise for further optimization.
- Holliday, Sarah,Ashraf, Raja Shahid,Nielsen, Christian B.,Kirkus, Mindaugas,R?hr, Jason A.,Tan, Ching-Hong,Collado-Fregoso, Elisa,Knall, Astrid-Caroline,Durrant, James R.,Nelson, Jenny,McCulloch, Iain
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p. 898 - 904
(2015/01/30)
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- Compounds for organic thin-film solar cells and organic thin-film solar cells
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Provided are compounds with a donor moiety, a first acceptor moiety and a second acceptor moiety, as shown by Formula (I): With the unique molecular design, compounds of Formula (I) can provide a desirable power conversion efficiency. Moreover, this invention also provides organic thin-film solar cells comprising the above-mentioned compounds.
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Page/Page column 6; 7
(2014/08/19)
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- A low-energy-gap organic dye for high-performance small-molecule organic solar cells
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A novel donor-acceptor-acceptor (D-A-A) donor molecule, DTDCTB, in which an electron-donating ditolylaminothienyl moiety and an electron-withdrawing dicyanovinylene moiety are bridged by another electron-accepting 2,1,3-benzothiadiazole block, has been synthesized and characterized. A vacuum-deposited organic solar cell employing DTDCTB combined with the electron acceptor C70 achieved a record-high power conversion efficiency (PCE) of 5.81%. The respectable PCE is attributed to the solar spectral response extending to the near-IR region and the ultracompact absorption dipole stacking of the DTDCTB thin film.
- Lin, Li-Yen,Chen, Yi-Hong,Huang, Zheng-Yu,Lin, Hao-Wu,Chou, Shu-Hua,Lin, Francis,Chen, Chang-Wen,Liu, Yi-Hung,Wong, Ken-Tsung
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supporting information; experimental part
p. 15822 - 15825
(2011/11/13)
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- New low bandgap molecules based on ethylene-separated benzothiadiazoles: Synthesis and bandgap comparison
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New ethylene-separated benzothiadiazoles were synthesized for the first time by using a facile procedure, and they showed lower bandgaps than the reported benzothiadiazole-containing compounds. This new benzothiadiazole- containing unit could be introduced into the backbone of the π-conjugated small molecules or polymers to develop new materials with a low bandgap that may have potential applications in optoelectronic fields.
- Liu, Yanmei,Lai, Hua,Zhong, Hongliang,Xu, Erjian,Du, Junping,Li, Yuxue,Fang, Qiang
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scheme or table
p. 4462 - 4465
(2010/09/12)
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