Syntheses and characterization of benzotriazole, thienopyrroledione and benzodithiophene containing conjugated random terpolymers for organic solar cells

Göksu, Kardelen.
Two random terpolymers, PBTS and PBTSe were designed and synthesized successfully as the donor units for polymer organic solar cell. Desired terpolymers contain alkoxy-benzodithiophene as an electron rich unit and Noctylthieno[3,4,c]pyrrole-4,6-dione (TPD) as the electron deficient group. Furthermore, thiophene and selenophene π bridges were introduced to benzotriazole unit as the acceptor moieties into copolymer backbone. The properties of synthesized terpolymers solar cell device were investigated by optical, electrochemical, spectroelectrochemical, kinetic studies. One of the terpolymer, PBTS showed an optical band gap of 1.84 eV with highest occupied molecular orbital (HOMO) energy level of -5.29 eV, open circuit voltage of 0.64 V, short circuit current density of 10.57 mA/cm2 and fill factor of 63.5%. The power conversion efficiency of bulk heterojunction solar cell device based on PBTS: PC71BM blend film was recorded as 4.30% by introducing 1% 1, 8 diiodooctane (DIO) as the solution process additive. The second terpolymer, PBTSe exhibited lower optical band gap of 1.78 eV with a HOMO energy level of -5.27 eV, open circuit voltage of 0.69 V, short circuit current density of 11.88 mA/cm2 and fill factor of 62.7%. The power conversion efficiency of bulk heterojunction solar cell device based on PBTS: PC71BM blend film was vi recorded as 5.15% by introducing 3% diphenyl ether (DPE) as the solution process additive


Synthesis of bistriphenylamine- and benzodithiophene-based random conjugated polymers for organic photovoltaic applications
CETIN, Asli; ISTANBULLUOGLU, Cagla; HACIOGLU, Serife Ozdemir; CEVHER, ŞEVKİ CAN; Toppare, Levent Kamil; Çırpan, Ali (2017-11-15)
In this study, donor-acceptor random polymers containing benzotriazole acceptor and bistriphenylamine and benzodithiophene donors, P1 and P2, were successfully synthesized by Stille coupling polymerization. The effect of bistriphenylamine moiety and thiophene -conjugated linker on electrochemical, spectroelectrochemical, and optical behaviors of the polymers were investigated. Optoelectronic properties and photovoltaic performance of the polymers were examined under the illumination of AM 1.5G, 100 mWcm(-2)...
Investigation the effect of π bridge and side chain on photovoltaic properties of benzodithiophene and quinoxaline based conjugated polymers
Taşkaya Aslan, Sultan; Alemdar, Eda; Hacıefendioğlu, Tuğba; UDUM, YASEMİN; Toppare, Levent Kamil; Yıldırım, Erol; Çırpan, Ali (2022-04-15)
© 2022 Elsevier LtdA series of donor–acceptor type alternative polymers containing 2D-BDT and 1D-BDT as the donors and quinoxaline as the acceptor were successfully obtained by Stille coupling reactions. Synthesized polymers containing selenophene and thiophene as π-bridges in their backbones and 2-ethylhexylselenophene and 2-ethylhexylalkoxy side groups on the BDT structure were named as P1, P2, P3 and P4, respectively. Eonsetox and Eonsetred were investigated for P1, P2, P3, and P4, respectively. Onset ox...
Photovoltaic properties of benzotriazole containing alternating donor–acceptor copolymers: Effect of alkyl chain length
Baran, Derya; Balan, Abidin; Stubhan, Tobias; Ameri, Tayebeh; Toppare, Levent Kamil; Brabec, Christoph J. (Elsevier BV, 2012-12)
A series of variable alkyl chain length substituted donor-acceptor (D-A) conjugated polymers with thiophene ring as the donor and benzotriazole moiety as the acceptor has been investigated in bulk heterojunction solar cells. The optical and electrochemical properties showed that the absorption onsets and the energy levels of the copolymers were not affected by alkyl substitution revealing 1.9 eV of optical band gap. The morphologies of the blend film can be fine-tuned by increasing the chain length attached...
Investigation of optoelectronic properties of benzotriazole and thiazole bearing conjugated polymers
Ünay, Hakan; Çırpan, Ali; Department of Polymer Science and Technology (2019)
This thesis deals with the design, synthesis and characterization of conjugated polymers P1 and P2 that have potential application in organic solar cell. Polymer design was accomplished by using band gap engineering method. According to that, benzodithiophene (BDT) and silafluorene were chosen as donor groups in P1 and P2 respectively. The acceptor parts were the same for both polymers including benzotriazole (BTZ) and thiazole group. According to electrochemical studies both polymers were having n-dopable ...
Probing Charge Transfer and Hot Carrier Dynamics in Organic Solar Cells with Terahertz Spectroscopy
CUNNINGHAM, Paul D.; LANE, Paul A.; MELINGER, Joseph S.; Esentürk, Okan; HEILWEIL, Edwin J. (2016-04-19)
Time-resolved terahertz spectroscopy (TRTS) was used to explore charge generation, transfer, and the role of hot carriers in organic solar cell materials. Two model molecular photovoltaic systems were investigated: with zinc phthalocyanine (ZnPc) or alpha-sexathiophene (alpha-6T) as the electron donors and buckminsterfullerene (C-60) as the electron acceptor. TRTS provides charge carrier conductivity dynamics comprised of changes in both population and mobility. By using time-resolved optical spectroscopy i...
Citation Formats
K. Göksu, “Syntheses and characterization of benzotriazole, thienopyrroledione and benzodithiophene containing conjugated random terpolymers for organic solar cells,” Thesis (M.S.) -- Graduate School of Natural and Applied Sciences. Chemistry., Middle East Technical University, 2019.