Syntheses and Characterization of Benzotriazole, Thienopyrroledione, and Benzodithiophene Containing Conjugated Random Terpolymers for Organic Solar Cells

Goksu, Kardelen
Hizalan, Gonul
Udum, Yasemin Arslan
Hacioglu, Serife Ozdemir
Cevher, Sevki Can
Akrema, Akrema
Toppare, Levent Kamil
Çırpan, Ali
Two random terpolymers bearing alkoxy-benzodithiophene as an electron-rich unit and N-octylthieno[3,4,c]pyrrole-4,6-dione (TPD) as an electron deficient group with thiophene and selenophene pi bridges, were synthesized and characterized. Electrochemical, optical properties of the polymers were analyzed to get an insight on the effect of different p bridges. Photovoltaic performances of the polymers were investigated with a conventional device architecture. PBTS, PBTSe based polymer solar cells (PSCs) exhibited power conversion efficiency of 3.32% and 3.19%. PCE of PBTS:PC71BM based PSCs were improved to 4.30% with the addition of 1% (vol/vol) 1,8-diiodooctane (DIO) as a solution processing additive. With the introduction of diphenyl ether (DPE) as the solvent additive, PBTSe based polymer solar cells attained 5.15% PCE value due to the formation of the interpenetrated network structure of domains. (C) 2019 The Electrochemical Society.


Benzodithiophene and Benzotriazole Bearing Conjugated Polymers for Electrochromic and Organic Solar Cell Applications
UNLU, Naime Akbasoglu; HACIOGLU, Serife O.; HIZALAN, Gonul; Yildiz, Dilber Esra; Toppare, Levent Kamil; Çırpan, Ali (The Electrochemical Society, 2017-01-01)
Herein, alternating donor-acceptor type benzodithiophene and benzotriazole bearing copolymers were synthesized and thieno[3,2-b] thiophene and furan units were incorporated as pi-bridges. The application of these polymers for electrochromic and photovoltaic studies were performed. Spectroelectrochemical studies illustrate that both polymers showed multichromic behavior due to tailoring of polaron bands in visible region. Photovoltaic properties of P2 were performed by conventional device structure. The best...
Synthesis and Characterization of Thiophene and Thieno[3,2-b]thiophene Containing Conjugated Polymers
Rustamh, Elvin; Goker, Seza; UDUM, YASEMİN; Udum, Yasemin Arslan; Toppare, Levent Kamil (The Electrochemical Society, 2015-01-01)
Herein, we report the synthesis of two donor-acceptor-donor polymers (P1 and P2) based on thiophene (M1) and thieno [3,2-b]thiophene (M2) as the donor and 2,5-bis(dodecyloxy)benzene as the acceptor unit. The effects of different donor units on the polymers' electrochemical and optical properties were examined by cyclic voltammetry and spectroelectrochemical analysis. Introducing thieno[3,2-b]thiophene unit as the donor unit enhances pi-stacking and consequently lowering the bandgap of the resulting polymer....
Syntheses and Electrochemical Characterization of Low Oxidation Potential Nitrogen Analogs of Pedot as Electrochromic Materials
Hacioglu, Serife O.; Yigit, Deniz; Ermis, Emel; Soylemez, Saniye; GÜLLÜ, Mustafa; Toppare, Levent Kamil (The Electrochemical Society, 2016-01-01)
In this study, the electropolymerization of ethyl andmethyl substituted asymmetrical nitrogen analogs of 3,4-ethylenedioxythiophene (OEt and OMe) were synthesized, characterized and their electrochemical properties were investigated. Both polymers (POEt and POMe) were synthesized electrochemically and characterized using spectroelectrochemical technique to determine optical changes of the resulting polymer films. Electrochemical studies demonstrated that these polymers exhibited a significantly low oxidatio...
Investigation of Fluorine Atom Effect on Benzothiadiazole Acceptor Unit in Donor Acceptor Donor Systems
Çakal, Deniz; Akdağ, Akın; Önal, Ahmet Muhtar (The Electrochemical Society, 2019-07-12)
Synthesis of two new pi-conjugated monomers containing fluorine substituted benzothiadiazoles as acceptor units and 3,4-ethylenedioxythiophene (EDOT) as donor unit was accomplished by facilitating Stille cross-coupling reactions (4,7-bis(2,3-dihydrothieno[3,4-b][1,4] dioxin-5-yl)-5-fluorobenzo[c][1,2,5] thiadiazole (E2BTD-F) and 4,7-bis(2,3-dihydrothieno [3,4-b][1,4] dioxin-5-yl)-5,6-difluorobenzo[c][1,2,5] thiadiazole (E2BTD-2F)). NMR and HRMS spectra of newly synthesized compounds are in agreement with th...
Electrochemical Behavior of Hydrazine Borane in Methanol Solution
Ozhava, Derya; Önal, Ahmet Muhtar; Özkar, Saim (The Electrochemical Society, 2014-01-01)
Electrochemical behavior of hydrazine borane (HB) was investigated on gold electrode in 0.5 M LiClO4 solution in methanol using cyclic voltammetry, electrochemical impedance spectroscopy (EIS) and chronoamperometry. Two irreversible peaks at 164 and 530 mV are attributed to direct electro-oxidation of HB on gold electrode in methanol. Both EIS results and CV data at different scan rates indicate a diffusion controlled electron transfer reaction. Furthermore, the Tafel slope (b = 0.191 V) and charge transfer...
Citation Formats
K. Goksu et al., “Syntheses and Characterization of Benzotriazole, Thienopyrroledione, and Benzodithiophene Containing Conjugated Random Terpolymers for Organic Solar Cells,” JOURNAL OF THE ELECTROCHEMICAL SOCIETY, pp. 0–0, 2019, Accessed: 00, 2020. [Online]. Available: