Design and modification of three-component randomly incorporated copolymers for high performance organic photovoltaic applications

Li, Jun; Ong, Kok-Haw; Sonar, Prashant; Lim, Siew-Lay; Ng, Ging-Meng; Wong, Hoi-Ka; Tan, Huei-Shuan; Chen, Zhi-Kuan

doi:10.1039/c2py20763j

Cited by 48 publications

(31 citation statements)

References 77 publications

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“…(a); Table ], due to the decrease of both V oc and FF of the PSCs. It was observed that an increase in the PC 70 BM content resulted in a slight decrease in the V oc , which has been observed for other donor polymers . The reduction in the V oc correlated with the decrease in the energy of the charge transfer (CT) states with increasing PC 70 BM concentrations.…”

Section: Resultssupporting

confidence: 53%

Effects of donor unit and π‐bridge on photovoltaic properties of D–A copolymers based on benzo[1,2‐b:4,5‐c']‐dithiophene‐4,8‐dione acceptor unit

Bin

Xiao

Liu

et al. 2014

J. Polym. Sci. Part A: Polym. Chem.

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A series of donor‐π‐acceptor (D‐π‐A) conjugated copolymers (PBDT‐AT, PDTS‐AT, PBDT‐TT, and PDTS‐TT), based on benzo[1,2‐b:4,5‐c']dithiophene‐4,8‐dione (BDD) acceptor unit with benzodithiophene (BDT) or dithienosilole (DTS) as donor unit, alkylthiophene (AT) or thieno[3,2‐b]thiophene (TT) as conjugated π‐bridge, were designed and synthesized for application as donor materials in polymer solar cells (PSCs). Effects of the donor unit and π‐bridge on the optical and electrochemical properties, hole mobilities, and photovoltaic performance of the D‐π‐A copolymers were investigated. PSCs with the polymers as donor and PC70BM as acceptor exhibit an initial power conversion efficiency (PCE) of 5.46% for PBDT‐AT, 2.62% for PDTS‐AT, 0.82% for PBDT‐TT, and 2.38% for PDTS‐TT. After methanol treatment, the PCE was increased up to 5.91%, 3.06%, 1.45%, and 2.45% for PBDT‐AT, PDTS‐AT, PBDT‐TT, and PDTS‐TT, respectively, with significantly increased FF. The effects of methanol treatment on the photovoltaic performance of the PSCs can be ascribed to the increased and balanced carrier transport and the formation of better nanoscaled interpenetrating network in the active layer. The results indicate that both donor unit and π‐bridge are crucial in designing a D‐π‐A copolymer for high‐performance photovoltaic materials. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014, 52, 1929–1940

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Section: Resultssupporting

confidence: 53%

Effects of donor unit and π‐bridge on photovoltaic properties of D–A copolymers based on benzo[1,2‐b:4,5‐c']‐dithiophene‐4,8‐dione acceptor unit

Bin

Xiao

Liu

et al. 2014

J. Polym. Sci. Part A: Polym. Chem.

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“…The former is owe to the strong intramolecular charge transfer (ICT) that occurs between donor and acceptor, the latter is attributed to the localized π−π* transition of the polymer backbone . In the past few years, a promising approach was to develop random terpolymers by copolymerizing one electron‐rich unit and two different electron‐deficient units or one electron‐deficient unit and two different electron‐rich units to broaden the absorption spectrum …”

Section: Introductionmentioning

confidence: 99%

Tuning the photovoltaic performances of the terpolymers based on thiophene‐benzene‐thiophene via the modification of alkyl side chains

Guo

Shen

et al. 2015

J of Applied Polymer Sci

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Three new random conjugated terpolymers based on thiophene‐2,5‐bis((2‐ ethylhexyl)oxy)benzene‐thiophene or thiophene‐2,5‐bis((2‐octyl)oxy)benzene‐ thiophene as electron‐donating units, diketopyrrolopyrrole (DPP) and 4,7‐dithien‐5‐yl‐2,1,3‐benzothiadiazole (DTBT) side group as electron‐withdrawing units have been designed and synthesized by Stille‐coupling reaction. All the terpolymers exhibit good thermal stability, broad absorption in the range of 300 to 800 nm. By tuning the alkyl side chains of the terpolymers, the absorption spectra, HOMO energy levels and photovoltaic properties of the terpolymers changed dramatically. A bulk heterojunction polymer solar cell fabricated from terpolymer GP2 and PC61BM exhibited a promising power conversion efficiency of 3.31% without any processing additives. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 42982.

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“…The copolymerization of this electron-deficient unit with different electron-rich segments has resulted in solar cells with efficiencies up to 8%. 29,[44][45][46][47][48][49][50][51][52] The most promising candidates consist of the conjugation of the DPP moiety to a thienothiophene fragment with a varying number of interconnecting thiophene units. For the simplest case, Meager et al reported PDPP-TT-T based devices with efficiencies >7% for some particular alkyl chain branching position manipulation ( Fig.…”

Section: Diketopyrrolopyrrolesmentioning

confidence: 99%

Polymer:fullerene solar cells: materials, processing issues, and cell layouts to reach power conversion efficiency over 10%, a review

2015

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Design and modification of three-component randomly incorporated copolymers for high performance organic photovoltaic applications

Cited by 48 publications

References 77 publications

Effects of donor unit and π‐bridge on photovoltaic properties of D–A copolymers based on benzo[1,2‐b:4,5‐c']‐dithiophene‐4,8‐dione acceptor unit

Effects of donor unit and π‐bridge on photovoltaic properties of D–A copolymers based on benzo[1,2‐b:4,5‐c']‐dithiophene‐4,8‐dione acceptor unit

Tuning the photovoltaic performances of the terpolymers based on thiophene‐benzene‐thiophene via the modification of alkyl side chains

Polymer:fullerene solar cells: materials, processing issues, and cell layouts to reach power conversion efficiency over 10%, a review

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