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2 results on '"Thiophene bearing copolymers"'

1. Synthesis, electrochromic characterization and solar cell application of thiophene bearing alternating copolymers with azobenzene and coumarin subunits.

Author

Kalay, Hüseyin, Yiğit, Deniz, Hizalan, Gonul, Güllü, Mustafa, Depci, Tolga, Cirpan, Ali, Toppare, Levent, and Hacioglu, Serife O.

Subjects
*SOLAR cells, *COUMARINS, *STILLE reaction, *OPEN-circuit voltage, *ELECTRON donors, *ELECTROPHILES
Abstract

In this study, azobenzene and coumarin functionalized thiophene comprising two copolymers (poly (4-((3‴-hexyl-[2,2′:5′,2″:5″,2‴-tetrathiophene] − 3′-yl)methoxy) - 2H-chromen-2-one (P1) and poly (1-(4-((4‴-hexyl-[2,2′: 5′, 2″: 5″, 2‴ - tetrathiophene] − 3′-yl) methoxy) phenyl) −2-phenyldiazene) (P2)), were designed and synthesized according to the donor–acceptor (D–A) approach to investigate their electrochemical, optical and photovoltaic behaviors. Among the various copolymerization methods to obtain P1 and P2, Stille copolymerization reaction was preferred. The HOMO and LUMO values were determined via cyclic voltammetry (CV) as −5.64 eV and −3.76 eV for P1 and −5.47 eV and −3.83 eV for P2, respectively. The optical band gaps of the polymers were calculated as 1.88 eV and 1.64 eV using UV-VIS spectrophotometer for P1 and P2. Electrochemical and spectroelectrochemical studies for synthesized copolymers support their usage in organic solar cell applications. The organic solar cells (OSCs) were designed using polymer as an electron donor group and PC60BM as an electron acceptor group. Performances of OSCs based on P1 and P2 were investigated with the device structure of ITO/PEDOT:PSS/Polymer(P1/P2):PC60BM/LiF/Al. The preliminary solar cell results were reported here and studies are going on in our laboratories to increase the efficiency. The highest power conversion efficiency was obtained as 0.81% for P1 based device with 0.47 V open-circuit voltage (Voc) and 4.92 mA/cm2 current density (Jsc) values. The highest efficiency for P2 comprising device was found to be 0.96% under optimum conditions with 0.60 V and 4.98 mA/cm2, Voc and Jsc values, respectively. [ABSTRACT FROM AUTHOR]

Published
2020
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2. Synthesis, electrochromic characterization and solar cell application of thiophene bearing alternating copolymers with azobenzene and coumarin subunits

Author

Gonul Hizalan, Levent Toppare, Ali Cirpan, Tolga Depci, Hüseyin Kalay, Serife O. Hacioglu, Deniz Yiğit, Mustafa Güllü, Mühendislik ve Doğa Bilimleri Fakültesi -- Enerji Sistemleri Mühendisliği Bölümü, Mühendislik ve Doğa Bilimleri Fakültesi -- Petrol ve Doğalgaz Mühendisliği Bölümü, Mühendislik ve Doğa Bilimleri Fakültesi -- Mühendislik Temel Bilimleri Bölümü, Kalay, Hüseyin, Depci, Tolga, and Hacıoğlu, Şerife Özdemir

Subjects
Cyclic voltammetry, Polymers and Plastics, Polymers, Organic solar cells, Performance, 02 engineering and technology, Efficiency, 01 natural sciences, law.invention, Spectroelectrochemical study, chemistry.chemical_compound, law, Copolymerization, Alternating copolymer, Materials Chemistry, Thiophene, Copolymer, Spectroelectrochemistry, Conductive polymer, Azobenzene, 021001 nanoscience & nanotechnology, Energy gap, Electrochromism, 0210 nano-technology, Electrochromic Device | Viologen | Stille Reaction, Derivatives, Open circuit voltage, Materials science, Polymer Science, Conducting polymers, UV-Vis spectrophotometers, Coumarin, 010402 general chemistry, Power conversion efficiencies, Polymer chemistry, Solar cell, Copolymerization reactions, Bearing (mechanical), General Chemistry, Polythiophene, 0104 chemical sciences, chemistry, Ceramics and Composites, Solar-cell applications, Thiophene bearing copolymers, Electron acceptor groups
Abstract

WOS: 000524014100001, In this study, azobenzene and coumarin functionalized thiophene comprising two copolymers (poly (4-((3"'-hexyl-[2,2 ':5 ',2 '':5 '',2"'-tetrathiophene] - 3 '-yl)methoxy) - 2H-chromen-2-one (P1) and poly (1-(4-((4"'-hexyl-[2,2 ': 5 ', 2 '': 5 '', 2"' - tetrathiophene] - 3 '-yl) methoxy) phenyl) -2-phenyldiazene) (P2)), were designed and synthesized according to the donor-acceptor (D-A) approach to investigate their electrochemical, optical and photovoltaic behaviors. Among the various copolymerization methods to obtain P1 and P2, Stille copolymerization reaction was preferred. The HOMO and LUMO values were determined via cyclic voltammetry (CV) as -5.64 eV and -3.76 eV for P1 and -5.47 eV and -3.83 eV for P2, respectively. The optical band gaps of the polymers were calculated as 1.88 eV and 1.64 eV using UV-VIS spectrophotometer for P1 and P2. Electrochemical and spectroelectrochemical studies for synthesized copolymers support their usage in organic solar cell applications. The organic solar cells (OSCs) were designed using polymer as an electron donor group and PC60BM as an electron acceptor group. Performances of OSCs based on P1 and P2 were investigated with the device structure of ITO/PEDOT:PSS/Polymer(P1/P2):PC60BM/LiF/Al. The preliminary solar cell results were reported here and studies are going on in our laboratories to increase the efficiency. The highest power conversion efficiency was obtained as 0.81% for P1 based device with 0.47 V open-circuit voltage (V-oc) and 4.92 mA/cm(2) current density (J(sc)) values. The highest efficiency for P2 comprising device was found to be 0.96% under optimum conditions with 0.60 V and 4.98 mA/cm(2), V-oc and J(sc) values, respectively.

Published
2020

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