Alkyl end group Modification of Benzotriazole and Thiophene Containing Conjugated Polymers

Date

2016-07-21

Author

Cevher, Şevki Can
Keleş, Duygu
Özdemir Hacıoğlu, Şerife
Toppare, Levent Kamil
Çırpan, Ali

Metadata

Show full item record

Item Usage Stats

149
views

0
downloads

This study focused on modifying the alkyl‐end‐group of benzotriazole and thiophene containing conjugated polymers. Introducing a moiety with struc‐turally rigid and tendency to enhance the π‐π stacking and also absorption in the high energetic region, influence the both electronic and optic properties of the conjugated polymers. Stille cross coupling chemical polymerization method was performed to synthesize the polymer contains: benzotriazole and bisthiophene. Characterizations of polymers were done in terms of molecular weight (GPC), absorption wavelengths (Uv‐vis spec.), and electronic properties (CV). Broad absorption of polymer, which was located at λmax 582 and 533 nm, was found as great candidate for optoelectronic devices. However HOMO and LUMO levels play an important role for photovoltaic devices. The preliminary studies showed that low Voc and FF values as 0.4 V and 0.36 respectively. Without further optimizations Polymer:PCBM bulk heterojunction photovoltaic cell performance was at most 0.48% efficiency

Subject Keywords

Polymers, Solar cell, Benzotriazole

URI

https://hdl.handle.net/11511/85723

Conference Name

46th IUPAC World Polymer Congress (MACRO 2016) (17-21 July 2016)

Collections

Department of Chemistry, Conference / Seminar

Suggestions

OpenMETU
Core

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)...
Alkyl-end phenanthroimidazole modification of benzotriazole based conjugated polymers for optoelectronic applications Cevher, Şevki Can; Keles, Duygu; Hızalan, Gonul; Toppare, Levent Kamil; Çırpan, Ali (2018-10-01) 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 chem...
Effect of substituent groups on quinoxaline-based random copolymers on the optoelectronic and photovoltaic properties CEVHER, ŞEVKİ CAN; HIZALAN, Gonul; TEMIZ, Cansel; Udum, Yasemin Arslan; Toppare, Levent Kamil; Çırpan, Ali (2016-09-28) In this study, three low band gap donor-acceptor (D-A) type quinoxaline-based random copolymers were synthesized. The effect of varying substituent groups on quinoxaline groups on optoelectronic properties and the performance of bulk-heterojunction polymer solar cells was investigated. Electrochemical and optical studies indicate that these copolymers are promising materials for both electrochromic and polymer solar cells applications. Two random polymers were found as excellent candidates for NIR electroch...
Benzotriazole and quinoxaline containing random copolymers for bulk-heterojunction polymer solar cell applications Temiz, Cansel; Çırpan, Ali; Ünalan, Hüsnü Emrah; Department of Polymer Science and Technology (2015) In this study, benzotriazole and quinoxaline derivates bearing donor acceptor type three random copolymers were synthesized to achieve broad absorption spectrum in visible region. Quinoxalines are used as strong acceptors in conjugated polymers due to the imine nitrogen in the structure. Quinoxaline containing polymers are green in their neutral states and they reveal two distinct λmax at around 400 and 700 nm. Additionally, benzotriazole and thiophene bearing polymers are red in their neutral states with λ...
Selenophene-bearing low-band-gap conjugated polymers: tuning optoelectronic properties via fluorene and carbazole as donor moieties Yasa, Mustafa; GÖKER, SEZA; Toppare, Levent Kamil (Springer Science and Business Media LLC, 2020-05-01) In this study, two donor-acceptor (D-A)-type conjugated polymers, namely PQSeCz and PQSeFl, were designed and synthesized. Selenophene was incorporated as the pi-bridge and quinoxaline as an acceptor unit, while carbazole and fluorene were used as the donor units. Polymers were synthesized via palladium-catalyzed Suzuki polymerization reaction. All molecules were characterized by H-1 and C-13 NMR spectroscopy. The weight and number average molecular weights of the two polymers were determined by gel permeat...

Citation Formats

Ş. C. Cevher, D. Keleş, Ş. Özdemir Hacıoğlu, L. K. Toppare, and A. Çırpan, “Alkyl end group Modification of Benzotriazole and Thiophene Containing Conjugated Polymers,” presented at the 46th IUPAC World Polymer Congress (MACRO 2016) (17-21 July 2016), İstanbul, Turkey, 2016, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/85723.