Cyclopentadithiophene–Fluorene Copolymer for Organic Solar Cells and Light Emitting Diodes

Kostyanovsky, Vladislav A.; Susarova, Diana K.; Adam, Getachew; Lyubovskaya, Rimma N.; Troshin, Pavel A.

doi:10.1016/j.mencom.2013.01.009

Cited by 17 publications

(10 citation statements)

References 24 publications

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“…Furthermore color tunable photoluminescence that ranged from UV to visible red emission was possible for polymers 9-15 shown in Scheme 2. Cyclic voltammetry (CV) of these gallafluorene polymers identified higher lying HOMO and LUMO levels in comparison to their carbon-based surrogates, [39][40][41][42] suggesting that these novel gallafluorene polymers could be used as hole transport materials. Band gap narrowing via lowering of LUMO levels was possible by incorporating electron deficient benzotriazole (14) and benzothiadiazole (15) The Chujo group built upon their initial gallafluorene studies outlined in Schemes 1 and 2 to include four-coordinate boron-, aluminum-and indium-based heterofluorenes containing the Mamx ligand (Fig.…”

Section: Galliummentioning

confidence: 99%

Marriage of heavy main group elements with π-conjugated materials for optoelectronic applications

2016

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This review article summarizes recent progress in the synthesis and optoelectronic properties of conjugated materials containing heavy main group elements from Group 13-16 as integral components. As will be discussed, the introduction of these elements can promote novel phosphorescent behavior and support desirable molecular and polymeric properties such as low optical band gaps and high charge mobilities for photovoltaic and thin film transistor applications.

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Section: Galliummentioning

confidence: 99%

Marriage of heavy main group elements with π-conjugated materials for optoelectronic applications

2016

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“…43,53,54 The HOMO energy levels of P3 and P4 are estimated to be at −4.94 and −4.90 eV, respectively, and are lower in comparison to the HOMO values reported for copolymer of 9,9-dihexylfluorene with thiophene unit (−5.67 eV) 55 and copolymer of 9,9-dioctyl-2,7-dixylylfluorene with 4,7-dixylyl-2,1,3-benzothiadiazole (−5.50 eV). 44 In comparison to the HOMO and LUMO energy levels of P5 (−5.39 and −3.58 eV, respectively), those of copolymer PF8CPDT10 comprising cyclopentadithiophene and fluorene units (−5.42 and −3.25 eV) 56 are slightly lower and higher by 0.03 and 0.33 eV, respectively, and the optical bandgap reported for PF8CPDT10 (2.17 eV) 56 is also larger than that for P5 (1.81 eV). The reason for the narrow optical bandgap can be attributed to the presence of azo linkage between two fluorene units with donor cyclopentadithiophene unit which enhances planarity with more -conjugation in the solid state.…”

Section: Electrochemical Propertiesmentioning

confidence: 99%

Synthesis and photovoltaic device studies of azo‐linked low‐bandgap polymers

Meena

Alam

Dutta

et al. 2016

Polymer International

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We report the synthesis of a series of new polymers containing azo linkage as a part of the main chain. The monomer 1,2‐bis(7‐bromo‐9,9‐dioctyl‐9H‐fluoren‐2‐yl)diazene was synthesized using a precursor approach which avoids non‐selective bromination and was copolymerized with various donor or acceptor units. The homopolymer poly[1,2‐bis(9,9‐dioctyl‐9H‐fluoren‐2‐yl)diazene] (P1) as well as the copolymers poly[1‐(9,9‐dioctyl‐9H‐fluoren‐2‐yl)‐2‐(9,9,9′,9′‐tetraoctyl‐9H,9′H‐[2,2′‐bifluoren]‐7‐yl)diazene] (P2), poly[1‐(9,9‐dioctyl‐7‐(4‐octylthiophen‐2‐yl)‐9H‐fluoren‐2‐yl)‐2‐(9,9‐dioctyl‐9H‐fluoren‐2‐yl)diazene] (P3) and poly[4‐(7‐((9,9‐dioctyl‐9H‐fluoren‐2‐yl)diazenyl)‐9,9‐dioctyl‐9H‐fluoren‐2‐yl)benzo[c][1,2,5]thiadiazole] (P4) were synthesized by Suzuki polymerization. The copolymers poly[1‐(7‐(4,4‐dioctyl‐4H‐cyclopenta[1,2‐b:5,4‐b′]dithiophen‐2‐yl)‐9,9‐dioctyl‐9H‐fluoren‐2‐yl)‐2‐(9,9‐dioctyl‐9H‐fluoren‐2‐yl)diazene] (P5) and poly[4‐(5‐(7‐((9,9‐dioctyl‐9H‐fluoren‐2‐yl)diazenyl)‐9,9‐dioctyl‐9H‐fluoren‐2‐yl)‐4‐octylthiophen‐2‐yl)‐7‐(4‐octylthiophen‐2‐yl)benzo[c][1,2,5]thiadiazole] (P6) were synthesized by direct arylation polymerization reaction. Polymers synthesized using the direct arylation method show good molecular weight, with absorption maxima in the range 500 to 532 nm. P5 and P6 possess low optical bandgaps of 1.81 and 1.86 eV, respectively. A power conversion efficiency of 0.53% with open circuit voltage of 0.53 V, short circuit current density of 3.1 mA cm−2 and fill factor of 29% has been achieved with C71‐PCBM as acceptor in bulk heterojunction solar cells fabricated with P5 as donor. © 2016 Society of Chemical Industry

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“…Outside the scope of this review we left activities of our group (again together with collaboration partners) at IPCP RAS in the field of light emitting diodes [167][168][169][170][171][172], biocompatible and biodegradable electronics [174? -177], field-effect transistors [178], photodetectors [179][180][181] and memory elements [182].…”

Section: Discussionmentioning

confidence: 99%

Research in the Field of Organic Photovoltaics at the Institute for Problems of Chemical Physics of Russian Academy of Sciences

Troshin

2015

Organic Photonics and Photovoltaics

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In the present review we highlight the main research activities in the field of organic photonics and photovoltaics at the Institute for Problems of Chemical Physics of Russian Academy of Sciences (IPCP RAS). Extensive investigation of optical and electrical properties of π-conjugated organic compounds performed at IPCP RAS since 1960's resulted in design of many exciting materials representing organic semiconductors, metals and superconductors. Organic Schottky barrier and p/n junction photovoltaic devices constructed at IPCP RAS in 1960's and 1970's were among the first examples of reasonably efficient organic solar cells at that time. These early discoveries inspired younger generations of the researchers to continue the work of their mentors and explore the world of organic materials and photonic devices such as molecular photonic switches, organic light emitting diodes, solar cells, photodetectors, photoswitchable organic field-effect transistors and memory elements.

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Cyclopentadithiophene–Fluorene Copolymer for Organic Solar Cells and Light Emitting Diodes

Cited by 17 publications

References 24 publications

Marriage of heavy main group elements with π-conjugated materials for optoelectronic applications

Marriage of heavy main group elements with π-conjugated materials for optoelectronic applications

Synthesis and photovoltaic device studies of azo‐linked low‐bandgap polymers

Research in the Field of Organic Photovoltaics at the Institute for Problems of Chemical Physics of Russian Academy of Sciences

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