PL
 |
EN
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 11

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last
Wyniki wyszukiwania
Wyszukiwano:
w słowach kluczowych:  phthalocyanine
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
1
Content available Polscy badacze chemii porfiryn. 2. Od połowy XX wieku do czasów współczesnych
Wojaczyński Jacek
Wiadomości Chemiczne
|
2021
|
[Z] 75, 5-6
553--592
EN
The introduction of practical methods of synthesis of porphyrins by Adler and Lindsey led to the development of applications of these compounds in various fields, including catalysis and photodynamic therapy (PDT). The second part of the presentation of Polish porphyrin chemists has a form of overview of scientific groups working in the universities and other academic institutions in the cities of Krakow, Katowice, Wrocław, Opole, Poznań, Łódź, Warszawa, Siedlce, Lublin, Białystok, Gdańsk and Sopot.
2
Content available remote Researches of topography and optical properties of the thin films NiPc/PTCDA donor acceptor couple
Weszka J., Jarka P., Chwastek-Ogierman M., Hajduk B.
Journal of Achievements in Materials and Manufacturing Engineering
|
2012
|
Vol. 53, nr 2
81--88
EN
Purpose: The aim of this work consists of researches of surface topography and optical properties of organic thin films of NiPc : PTCDA blends deposited by thermal evaporation from one source. Thin films of organic materials are provided as donor/acceptor couple in heterojuction solar cells. Design/methodology/approach: Films consisting of NiPc and PTCDA mixture were deposited by thermal evaporation from one source. By using blends with different PTCDA to NiPc ratios and steering the temperature of the sources and hence deposition rate different properties of layers are obtained. Findings: Both the chemical composition and technological parameters of deposition process has appeared to influence on optical properties and surface morphology of thin films. These parameters were found to influence surface morphology and UV-Vis absorption spectra. Research limitations/implications: The paper shows the methodology of deposition NiPc/PTCDA donor/ acceptor blends and the influence of evaporation parameters on properties of thin films. That can be used for the research of the planar heterojunction solar cells based on NiPc/PTCDA heterojunction donor-acceptor couple active layers. Practical implications: Results of researches suggest that blends of NiPc and PTCDA can be useful materials in organic photovoltaic device. However right deposition parameters and the blends proportions determine the properties of NiPc/PTCDA donor/acceptor thin films. Originality/value: The goal of this paper is to definie the surface topography and optical properties of thin films NiPc/PTCDA blends prepared with different proportions of components and parameters of evaporation process.
3
Content available remote Investigations of morphology and optical properties of thin films of TiOPc/PTCDA donor acceptor couple
Weszka J., Jarka P., Hajduk B., Chwastek-Ogierman M.
Journal of Achievements in Materials and Manufacturing Engineering
|
2012
|
Vol. 55, nr 2
396--402
EN
Purpose: The aim of this work is studying surface topography and optical properties of organic thin films of TiOPc and PTCDA blends deposited by thermal vacuum evaporation. Design/methodology/approach: Thin films of blends of organic materials are provided as donor/acceptor couples in bulk heterojunction based organic solar cells. Thin films of TiOPc - PTCDA mixture have been deposited by thermal vacuum evaporation from one source with various ratios of blends components and deposition rates used. Both the chemical composition and technological parameters of the deposition process have appeared to influence on optical properties, UV-Vis absorption spectra in particular, and surface morphology of the as-prepared thin films. The paper reveals the methodology of deposition thin films of TiPc-PTCDA donor/ acceptor blends and the influence of deposition parameters on their properties. Findings: Thin films of such blends can be used for the research on the planar heterojunction solar cells based on donor-acceptor couple active layers. Results of these investigations suggest that blends of TiOPc and PTCDA can be suitable materials for preparing organic photovoltaic devices. Research limitations/implications: Deposition parameters and proportions of the blend components used determine the properties of TiOPc/PTCDA thin films. Originality/value: The goal of this paper is also to define relations connecting the surface morphology and optical properties of thin films of TiOPc-PTCDA blend prepared with their composition and parameters of the evaporation process.
4
Content available remote Effect of buffer layers on performance of organic photovoltaic devices based on copper phthalocyanine-perylene dye heterojunction
Signerski R., Jarosz G.
Opto-Electronics Review
|
2011
|
Vol. 19, No. 4
468-473
EN
The work presents the results of research on the systems formed from thin films of copper phthalocyanine (CuPc), N-N'-dimethylperylene-3,4,9,10-dicarboximide (MePTCDI), electrodes of ITO and Ag, and from buffer layers: MoO₃ at ITO and BCP at Ag. We have observed the effect of each buffer layer on voltage dependence of dark current and photocurrent, and on open circuit voltage-light intensity relationship. The system with both buffer layers exhibited the highest values of open circuit voltage and fill factor. The buffer layers improve transport of charge carriers within near-electrode regions, reduce dissociation of excitons on electrodes and reveal processes of charge carrier generation and recombination within the CuPc/MePTCDI junction.
5
Content available remote Effect of annealing and Gamma irradiation on tin phthalocyanine thin films
Regimol C. C., Menon C. S.
Materials Science Poland
|
2007
|
Vol. 25, No. 3
649--655
EN
Metal phthalocyanines are important among organic dyes because of their chemical and thermal stability. Thin film samples of tin phthalocyanine (SnPc) have been prepared for examination by thermal evaporation technique. Some optical and electrical properties of the samples were studied as a function of annealing temperature and Gamma radiation doses. Optical transition is found to be of direct type and optical band gaps are determined by analyzing the absorption spectrum. The activation energy of the dark conductivity is found to be highly dependent on both annealing and Gamma radiation doses.
6
Content available remote Interaction of nitrogen dioxide free base phthalocyaninewith
Białek B.
Optica Applicata
|
2005
|
Vol. 35, nr 3
323-328
EN
Quantum chemical ab initio method was used to investigate interactions between NO2 and H2Pc. Four possible sites for NO2 adsorption were considered. Full geometry optimisation together with frequency calculation was performed for the isolated molecules and the NO2-H2Pc complexes with the use of 6-31g(d,p) and minimal basis sets, respectively. Two stable and two transition states were found. The H2Pc molecular structure was found to be largely affected under the influence of NO2. It was found that for a certain chemisorption site H2Pc molecule might disintegrate and its building blocks could react with NO2 forming other species.
7
Content available remote Electrical and optical studies on thin films of indium phthalocyanine chloride
Mammen S., Menon C. S., Unnikrishnan N. V.
Materials Science Poland
|
2005
|
Vol. 23, No. 3
707--713
EN
Vacuum evaporated thin films of indium phthalocyanine chloride are prepared at room temperature. Post evaporation annealing is done at temperatures of 353 K, 403 K, 453 K and 503 K. The electrical conductivity and optical absorption spectra of these films are studied. From the optical absorption spectra, over a wavelength range of 200-900nm, the optical energy band gap Eg is calculated. A decrease in Eg is observed with an increase of annealing temperature. The thermal activation energy, Ea, is not notably affected by annealing. It is found that Ea is varied with a change in thickness of the film
8
Content available remote Experimental investigation of thin metalphthalocyanine layers CuPc, PbPc, NiPc by plasmon resonance method to be applied in NO2-sensors
Pustelny T., Ignac-Nowicka J., Opilski Z.
Optica Applicata
|
2004
|
Vol. 34, nr 2
249-264
EN
The surface plasmon resonance spectroscopy is an optical technique that is capable of monitoring chemical and physical processes. It is sensitive to detect small changes of dielectric properties in a metal-phthalocyanine boundary. For this reason plasmon resonance phenomena have been used to characterize a number of different types of films. This work analyses the possibility of using the surface plasmon resonance phenomena in the detection of gas. Thin films of copper, lead and nickel phthalocyanines have been examined in the plasmon system from the point of view of their application to NO2 sensors
9
Surface Plasmon Resonance Phenomena and Its Application for Metalphthalocyanine Sensor Layers Investigations
Pustelny T., Ignac-Nowicka J., Opilski Z.
Molecular and Quantum Acoustics
|
2003
|
Vol. 24
47-60
EN
The surface plasmon resonance spectroscopy is a technique that is capable of monitoring chemical and physical processes. It is sensitive to detect small changes of dielectric properties in a metal-phthalocyanine boundary. For this reason plasmon resonance phenomena have been used to characterize a number of different types of films. This work analyses the possibility of using the surface plasmon resonance phenomena in the detection of gas. Thin films of copper and lead phthalocyanines have been examined in the plasmon system from the point of view of their application in NO2 sensors.
10
On the electronic structure of some transition metal phthalocyanines
Białek B., Brągiel P., Piasecki M.
Prace Naukowe. Chemia / Wyższa Szkoła Pedagogiczna w Częstochowie
|
2001
|
Vol. 5
115--121
11
Content available remote Spectrophotometric determination of phthalocyanines. Part II. Phthalocyanines stable in concentrated sulfuric acid
Słota R., Dyrda G., Wacławek W.
Chemia Analityczna
|
2001
|
Vol. 46, No. 6
889-895
EN
The work was done to show the usefulness of VIS spectroscopy in the quantitative studies of different phthalocyanine compounds. In particular, it was focused on unsubstituted metal phthalocyanines commonly believed to be stable in concentrated sulfuric acid. As a result, a simple spectral analytical method (VIS), which is an extension of the one previously presented [ 1 ], has been proposed for the determination of a number of d — electron metal phthalocyanines, Mpc (where M = Cu, Co, Ni, Zn and pc is the phthalocyanine ligand, (C(32)H(16)N(8)2-. Statistical evaluation of the results obtained in the control tests have proved the described method to be useful both in industrial and scientific research applications.
PL
Celem pracy było wykazanie możliwości zastosowania spektroskopii VIS do badań ilościowych różnych związków ftalocyjaniny, w szczególności niepodstawionych kompleksów z metalami, które są trwałe w środowisku stężonego kwasu siarkowego(Vl). Zaproponowano prostą metodę, analizy spektrofotometrycznej VIS, stanowiącą kontynuację wcześniej przedstawionej pracy [1], umożliwiając oznaczanie wielu kompleksów ftalocyjaniny z metalami bloku d, Mpc (gdzie M = Cu, Co, Ni, Zn oraz pc (C(32)H(16)N(8)2- = ligand ftalocyjaninowy). Analiza statystyczna wyników uzyskanych w badaniach kontrolnych wykazała, że opisana metoda może być użyteczna zarówno w zastosowaniach przemysłowych jak i badaniach naukowych.
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.