50739-54-3Relevant academic research and scientific papers
Efficient dye-sensitized solar cell based on a new porphyrin complex as an inorganic photosensitizer
Nasirian, Azam,Mirkhani, Valiollah,Moghadam, Majid,Tangestaninejad, Shahram,Mohammadpour Baltork, Iraj
, (2020)
Abstract: The synthesis of new porphyrin complexes that can absorb light in a broad range of the spectrum is very important for getting a high efficiency in dye-sensitized solar cells. The primary reason for using these complexes is good photophysical characteristic like good absorption and high quantum efficiency. Most of the metal porphyrin shows good photophysical characteristics with changing their ligands. In this work, the synthesis of a new Zn-porphyrin complex, that has a good spectral and electrochemical characteristic, is reported. Then, this complex is used as a dye in dye-sensitized solar cells, using titanium dioxide as a semiconductor. The application of this complex in a dye-sensitized nanocrystalline TiO2 solar cell has indicated a short circuit density of 11.60 mA, an open circuit potential of 0.65 V with an overall efficiency of 5.33%. The overall conversion efficiency of this system is due to the efficient electron injection into the conduction band during light absorption. Graphic abstract: In this work, the synthesis of a new Zn-porphyrin complex, together with its spectral and electrochemical properties, is described. The application of this complex in a dye-sensitized nanocrystalline TiO2 solar cell indicated a short circuit density of 11.60 mA, an open circuit potential of 0.65V with an overall efficiency of 5.33%.[Figure not available: see fulltext.]
Ambient stable, hydrophobic, electrically conductive porphyrin hole-extracting materials for printable perovskite solar cells
Reddy, Govind,Katakam, Ramakrishna,Devulapally, Koteshwar,Jones, Lathe A.,Della Gaspera, Enrico,Upadhyaya, Hari M.,Islavath, Nanaji,Giribabu, Lingamallu
supporting information, p. 4702 - 4708 (2019/05/10)
Fundamental properties of organic molecules such as symmetry and conjugation have a major impact on their functional properties and applications. In this study, we designed and synthesized hydrophobic, electrically conductive porphyrin derivatives using N-octyl phenothiazine as the donors and a porphyrin as the π-spacer in a D-π-D configuration. These materials are candidates for hole transport layers (HTL) within optoelectronic devices, and specifically perovskite solar cells (PSC). Detailed optical, electrical and electrochemical characterization of the porphyrin molecules were used to assess their properties, revealing good conductivity, clear electronic transitions and HOMO energy levels well aligned with the valence band of methylammonium lead iodide, the archetypal absorber in PSCs. We fabricated all-solution processed perovskite devices through screen-printing of the various layers and, adopting a carbon nanoparticle-graphene composite cathode, achieved a high photocurrent density of >19.5 mA cm-2 and power conversion efficiency of >11% for our porphyrin derivatives. In addition, by the introduction of hydrophobic octyl groups on the porphyrin substituents, we could achieve excellent water stability of our devices without the need for encapsulation, confirming the promise of these materials for stable HTLs. Such hydrophobic porphyrin systems will have broad academic and industrial interest for use in photovoltaics, light emitting diodes, photodetectors and other optoelectronic devices.
Branched and linear alkoxy chains-wrapped push-pull porphyrins for developing efficient dye-sensitized solar cells
Song, Heli,Li, Xin,?gren, Hans,Xie, Yongshu
, p. 421 - 429 (2016/12/16)
Four alkoxy-wrapped push-pull porphyrin dyes containing the phenothiazine derived donor and the ethynylbenzoic acid acceptor have been designed, synthesized and used as sensitizers for fabricating efficient dye-sensitized solar cells (DSSCs). Branched or
Composition FOR PREVENTING ALOPECIA AND ACTIVATING HAIR GROWTH
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Paragraph 0116; 0185; 0186, (2018/02/16)
The present invention provides a hair growth promoter comprising as an active ingredient, a compound having a chemical structure of general formula (1) or a pharmacologically acceptable salt thereof. In the general formula (1): R_1 is a saturated or unsaturated straight chain or branched C1-C10 alkyl group or hydroxy alkyl group; R_2 is hydrogen or a saturated or unsaturated straight chain or branched C1-C10 alkoxy or hydroxy alkoxy; X is hydrogen, hydroxy, or a saturated or unsaturated straight chain or branched C1-C10 alkyl group, alkoxy or hydroxyl alkoxy; R_3 and R_4 are each independently selected from R_5, hydrogen, aldehyde, and a saturated or unsaturated straight chain or branched alkyl, alkoxy, or hydroxy alkoxy; R_5 has a structure of # AAA #; R_6 is selected from hydrogen, and a saturated or unsaturated straight chain or branched C1-C10 alkyl, alkoxy, or hydroxy alkoxy; and one of R_3 and R_4 is hydrogen.COPYRIGHT KIPO 2017
Using the dye and pigment metalloporphyrin metalloporphyrin dye-sensitized solar cell and photoelectric conversion element
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Paragraph 0037; 0070, (2017/06/02)
PROBLEM TO BE SOLVED: To provide a novel dye broad in the absorption wavelength range in the near infrared region and good in the phtoelectric conversion efficiency, and a photoelectric conversion device and a dye-sensitized solar cell using the same.SOLUTION: There are provided a porphyrin dye represented by formula (1), and a photoelectric conversion device and a dye-sensitized solar cell using the same. In the formula, Aand Aare an atom group having a 5- or 6-membered ring containing carbon atoms in the ring; Rand Rare a monovalent substituent; M is two hydrogen atoms, or atoms or an atom group covalently or coordinately bondable to phthalocyanine.
The effect of porphyrins suspended with different electronegative moieties on the photovoltaic performance of monolithic porphyrin-sensitized solar cells with carbon counter electrodes
Chen, Jiangzhao,Ko, Songguk,Liu, Linfeng,Sheng, Yusong,Han, Hongwei,Li, Xiong
, p. 2889 - 2900 (2015/04/22)
Three D-π-A porphyrin sensitizers with different electronegative moieties (2,4,6-triphenyl-1,3,5-triazine, carbazole and triphenylamine) attached at the meso-position were designed and synthesized for monolithic dye-sensitized solar cells based on mesoscopic carbon counter electrodes. The effects of these different electronegative moieties on the photophysical, electrochemical and accordingly photovoltaic performance of the corresponding devices were investigated systematically. Electrochemical measurements indicate that the HOMO and LUMO energy levels could be tuned through the introduction of different electronegative groups onto the backbone of D-π-A porphyrin molecules. Current-voltage characteristics indicate that the Jsc and Voc of the DSSCs based on WH-C3, WH-C4 and WH-C5 increase as the electron-donating ability of their donors enhance in the order of WH-C3 sc) of 11.43 mA cm-2, an open circuit voltage (Voc) of 633.84 mV, and a fill factor (FF) of 0.69, corresponding to an overall conversion efficiency (η) of 5.00%.
The effect of different alkyl chains on the photovoltaic performance of D-π-A porphyrin-sensitized solar cells
Chen, Jiangzhao,Ko, Songguk,Liu, Linfeng,Sheng, Yusong,Han, Hongwei,Li, Xiong
, p. 3736 - 3746 (2015/05/20)
In this study, a series of novel D-π-A porphyrin sensitizers with different alkyl chains were designed and synthesized for dye-sensitized solar cells. The effects of different alkyl chains (methyl, methoxyl and hexyloxy groups) on the photophysical, electrochemical and photovoltaic performance were investigated systematically. The results indicate that the molar extinction coefficients of three dyes normally increase as the alkyl chain length increases. Furthermore, it is also found that the incident photo-to-current conversion efficiencies (IPCEs), short circuit current (Jsc) and open circuit voltage (Voc) of the dye-sensitized solar cells (DSSCs) based on WH-C1, YD20 and WH-C2 increase with the elongation of alkyl chains in the order of WH-C1 sc of 13.10 mA cm-2, a Voc of 831.10 mV, and a fill factor (FF) of 0.70.
Highly improved performance of ZnII tetraarylporphyrinates in DSSCs by the presence of octyloxy chains in the aryl rings
Orbelli Biroli,Tessore,Vece,Di Carlo,Mussini,Trifiletti,De Marco,Giannuzzi,Manca,Pizzotti
supporting information, p. 2954 - 2959 (2015/02/19)
Three new β-substituted ZnII-tetraarylporphyrinate dyes (1-3), bearing octyloxy chains at the o,o-, o,p- or o-positions of the four phenyl groups respectively, were synthesized, characterized and investigated as sensitizers for DSSCs. In particular, the alkoxy group position strongly influences their electronic absorption and electrochemical features. Improvements in power conversion efficiency ranging from 40% to 80% were obtained with respect to a reference dye (4) characterized by the presence of sterically bulky t-butyl groups at the m-positions.
Novel pyromellitic diimide-based macrocycle with a linear π-electronic system and bis(phenylethynyl)pyromellitic diimide: Syntheses, structures, photophysical properties, and redox characteristics
Kato, Shin-Ichiro,Nonaka, Yasuhiro,Shimasaki, Toshiaki,Goto, Kenta,Shinmyozu, Teruo
, p. 4063 - 4075 (2008/09/20)
(Chemical Equation Presented) We report the syntheses, structures, photophysical properties, and redox characteristics of the [2 + 2] pyromellitic diimide-based macrocycle with a linear π-electronic system 2 as well as the 3,6-bis(phenylethynyl)pyromellitic diimide derivative 3. The interesting solid state structural properties of the clathrates of 3 with π-donors are also reported. The macrocycle 2 was synthesized by the direct cyclocondensation followed by the Sonogashira coupling reaction. X-ray crystallographic studies showed that the phenylacetylene moieties in 2 formed the intramolecular benzene dimer structures, and the bis(phenylethynyl)pyromellitic diimide moieties in both 2 and 3 were stacked in a parallel and slanted arrangement. Theoretical calculations for 2′ and 3 suggested the existence of electrostatic interactions between the bis(phenylethynyl)pyromellitic diimide moieties. The UV/vis spectral measurements and TDDFT calculations of 2, 2′, and/or 3 were performed to understand their electronic transitions. The fluorescence spectral measurements showed that 2 and 3 have visible fluorescence properties and 2 displays an excimer fluorescence at ca. 590 nm. The cyclic voltammetry measurements revealed that the electrostatic repulsion between the diimide moieties in 2 is greater than that in 1 according to the extension of the π-electronic systems. X-ray crystallography of the clathrates of 3 with various π-donors demonstrated the formation of the segregated donor-acceptor structures, indicating the strong aggregation ability of the bis(phenylethynyl)pyromellitic diimide moiety.
Synthesis of Alkyl- and Alkoxy-Substituted Benzils and Oxidative Coupling to Tetraalkoxyphenanthrene-9,10-diones
Mohr, Bernhard,Enkelmann, Volker,Wegner, Gerhard
, p. 635 - 638 (2007/10/02)
Intermolecular Friedel-Crafts acylation of various substituted alkyl- or alkoxybenzenes with oxalyl chloride using carbon disulfide as solvent gave rise to the benzils 1a-k.Subsequent intramolecular oxidative coupling with either thallium(III) oxide/trifluoroacetic acid or vanadium(V) oxyfluoride/boron trifluoride diethyl etherate resulted in the corresponding phenanthrene-9,10-diones 2a-d.It has been shown that oxygen functionalities at the 3,3',4, and 4'positions are necessary for coupling to occur.These substituted benzils and phenanthrene-9,10-diones constitute precursors for ligands in the field of discotic metallomesogens or polymeric mesogens.
