A triazoloquinoxaline and benzodithiophene bearing low band gap copolymer for electrochromic and organic photovoltaic applications
By Hacioglu, Serife O.; Unlu, Naime A.; Aktas, Ece; Hizalan, Gonul; Yildiz, Esra D.; Cirpan, Ali; Toppare, Levent
Published in Synthetic Metals
NULL
2017
Abstract
Abstract A new triazoloquinoxaline and benzodithiophene based copolymer was synthesized to investigate its electrochemical, optical and photovoltaic behaviors. According to the polymer design, combination of two acceptor units (benzotriazole and quinoxaline) which contribute imine bonds to the structure and a triazoloquinoxaline unit for enhancing electron accepting ability was pursued. As a result of electrochemical studies, the copolymer {PTQBDT} has a low lying {HOMO} energy level as ?5.23 eV which increases the chemical stability of the resulting polymer and leads to a higher Voc. In addition, the copolymer has an ambipolar character with two well-defined redox couples in the n-doped state and multichromic behavior. In the context of optical studies, {PTQBDT} has wide absorption range in the visible region with a tail in the {NIR} region, which yields a low band gap of 1.20 eV. Organic photovoltaic devices were designed using {PTQBDT} (the electron donor) and {PC71BM} (the electron acceptor) for the preliminary studies. The resulting device exhibits a power conversion efficiency of 2.0% with a current density of 8.07 mA cm?2, an open-circuit voltage of 0.45 V, and a fill factor of 55%. The carrier mobility of the {PTQBDT} was calculated as 3.00
Microsoft is Ending Support for Windows 7
Microsoft will discontinue support for Windows 7 on January 14, 2020 which means Gamry will also be discontinuing support for Windows 7. If you are upgrading to Windows 10, like many companies and institutions, you need to be running Version 7 of our s oftware . Please note that only USB and Ethernet-based instruments can run in Version 7. Eligible users can download the latest version of our software through our online Client Portal .
If you haven't already registered your instrument, you can do so through the Client Portal .
Please email Technical Support if you have any questions regarding this transition. Please be sure to include your instrument model and serial number when contacting us.