Synthesis and Characterization of Two-Dimensional Conjugated Polymers Incorporating Electron-Deficient Moieties for Application in Organic Photovoltaics

Hsiow, Chuen-Yo; Lin, Yi-Sheng; Raja, Rathinam; Rwei, Syang‐Peng; Chiu, Wen‐Yen; Dai, Chi‐An; Wang, Leeyih

doi:10.3390/polym8110382

Cited by 4 publications

(4 citation statements)

References 45 publications

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“…The peak due to P3HT at ~624 nm is significantly quenched for P3HT:IC 60 BA:DHP as compared to the P3HT:IC 60 BA, resulting in efficient exciton dissociation between P3HT and IC 60 BA [ 53 ]. Furthermore, the space charge limited current (SCLC) method was used to confirm the improved hole mobility of P3HT:IC 60 BA and P3HT:IC 60 BA:DHP-based devices [ 54 , 55 ]. With the fabricated hole-only devices (glass/ITO/PEDOT:PSS/active blend/Au), the hole mobility values of binary P3HT:IC 60 BA and ternary P3HT:IC 60 BA:DHP blends were calculated as 2.15 × 10 −4 and 8.56 × 10 −4 cm 2 ·(Vs) −1 , respectively [ 56 ].…”

Section: Resultsmentioning

confidence: 99%

Improving Photovoltaic Properties of P3HT:IC60BA through the Incorporation of Small Molecules

Saianand

Gopalan

et al. 2018

Polymers

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Abstract:We investigated the role of a functional solid additive, 2,3-dihydroxypyridine (DHP), in influencing the optoelectronic, morphological, structural and photovoltaic properties of bulk-heterojunction-based polymer solar cells (BHJ PSCs) fabricated using poly(3-hexylthiophene): indene-C 60 bisadduct (P3HT:IC 60 BA) photoactive medium. A dramatic increase in the power conversion efficiency (~20%) was witnessed for the BHJ PSCs treated with DHP compared to the pristine devices. A plausible explanation describing the alignment of pyridine moieties of DHP with the indene side groups of IC 60 BA is presented with a view to improving the performance of the BHJ PSCs via improved crystalline order and hydrophobicity changes.

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Section: Resultsmentioning

confidence: 99%

Improving Photovoltaic Properties of P3HT:IC60BA through the Incorporation of Small Molecules

Saianand

Gopalan

et al. 2018

Polymers

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“…Conducting polymers (CPs) have attracted great interest for their unique optical properties including having a variety of colors, tuning of the energy band gap with minor structural modification, fast switching ability, and high optical contrast in the near infra-red (NIR) and visible regions [1,2,3,4]. Similar to inorganic semiconductors, CPs are considered unique photonic materials that combine their mechanical and structural properties together with the optoelectric characteristics of materials [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…Similar to inorganic semiconductors, CPs are considered unique photonic materials that combine their mechanical and structural properties together with the optoelectric characteristics of materials [5,6]. During the last two decades, the application of CPs has been widely reported in several optoelectronic devices such as: sensors [7,8], solar cells [1,9], light emitting electrochemical cells [10,11], and light emitting diodes [12,13]. Moreover, conducting CPs have been utilized as lasers and gain media for optical amplifiers with tunable features in the visible range of the electromagnetic spectrum [14,15,16].…”

Section: Introductionmentioning

confidence: 99%

Optical Properties and Amplified Spontaneous Emission of Novel MDMO-PPV/C500 Hybrid

2017

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Abstract:The influence of the solvent nature on optical properties of poly[2-methoxy-5-3,7-dimethyloctyloxy-1,4-phenylenevinylene] (MDMO-PPV)/Coumarine 500 (C500) have been investigated. In addition, the amplified spontaneous emission (ASE) from MDMO-PPV and efficient energy transfer between the MDMO-PPV and C500 has been verified. The MDMO-PPV was dissolved in aromatic and nonaromatic solvents, while the solution blending method was employed to prepare the MDMO-PPV:C500 hybrid. The quantum yield of the MDMO-PPV was found to increase with the reduction of a few factors such as polarity index of the solvent, absorption cross section (σ a ), emission cross section (σ e ), and extinction coefficient (ε max ). The fluorescence spectra of the MDMO-PPV appears from two vibronic band transitions (0-0, 0-1) and the ASE occurs at 0-1 transition, which was verified by the ASE from MDMO-PPV. The MDMO-PPV in toluene exhibited the best ASE efficiency due to its high quantum yield compared with other solvents. Strong overlap between the absorption spectrum of MDMO-PPV and emission spectrum of C500 confirmed the efficient energy transfer between them. Moreover, the ASE for energy transfer of the MDMO-PPV:C500 hybrid was proved.

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“…Leclerc and co-workers reported DPP-based terpolymer P8a with two weak donors, 6-(octyloxy)phenanthridine and 5-octylphenanthridin-6 (5H)-one at a ratio of 0. 39 Terpolymers P11a-P11f are composed of benzo[c][1,2,5]thiadiazole-thiophene as electron acceptor moieties and fluorene/carbazole as co-donors at different ratios. 40 By tailoring the ratio between fluorene and carbazole, the HOMO and LUMO energy levels of P11a-P11f can be tuned from − 5.62 to − 5.47 eV and from − 3.79 to − 3.95 eV, respectively.…”

Section: D1a-type Conjugated D-a Terpolymersmentioning

confidence: 99%

Conjugated D–A terpolymers for organic field-effect transistors and solar cells

Luo

Liu

Zhang

2017

Polym J

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The incorporation of additional electron donors or acceptors into the backbones of conjugated polymers with alternating donors and acceptors results in various conjugated D-A terpolymers. The presence of additional electron donors or acceptors in the conjugated backbones can modulate the electronic absorptions and highest occupied molecular orbital/lowest unoccupied molecular orbital levels, as well as interchain interactions and thin-film morphology. Because of these structural features, conjugated D-A terpolymers have been intensively investigated in recent years for applications in field-effect transistors and photovoltaic cells. In this review, we introduce the recent developments of conjugated D-A terpolymers with various combinations of electron donors and acceptors, and discuss the future perspectives for conjugated terpolymers. In recent decades, conjugated polymers have demonstrated promising applications in flexible, large-area and low-cost electronic devices, such as organic field-effect transistors (OFETs) 1-3 and solar cells (OSCs). [4][5][6][7] This is attributed to the conjugated electronic and polymeric structures of these polymers, resulting in semiconducting properties with good solution processability, mechanical property and thermal stability. 8,9 Among the conjugated polymers, conjugated alternating polymers consisting of both electron donors (D) and electron acceptors (A), referred to as conjugated D-A polymers, [10][11][12][13][14][15][16][17] have been extensively investigated in recent years. The studies indicate that electronic absorptions, highest occupied molecular orbital/lowest unoccupied molecular orbital (HOMO/LUMO) energies (and bandgaps), interchain interactions and thin-film morphologies of conjugated D-A polymers can be effectively tuned 10-17 by properly varying the electron donors and acceptors as well as the linkers. Consequently, the semiconducting performance of conjugated D-A polymers can be tuned in this way. In fact, polymeric p-type, n-type and even ambipolar semiconductors with high charge mobilities have been developed on the basis of conjugated D-A polymers. 18-21 Moreover, conjugated D-A polymers have been successfully utilized as either electron donors or acceptors for OSCs with high power conversion efficiencies (PCEs). [22][23][24][25] Apart from conjugated polymers with alternating electron donor and acceptor moieties, conjugated D-A terpolymers, which contain either one kind of acceptor/two types of electron donors (2D1A) or one kind of donor/two types of electron acceptors (1D2A) in the backbones as illustrated in Scheme 1, have received increased attention. It is expected that an additional dimension is generated for tuning the electronic structures of conjugated polymers and thus their absorptions and HOMO/LUMO levels as well as interchain packing 8,26 with such conjugated D-A terpolymers. Moreover, the combination of existing electron donors and acceptors can yield a huge number of terpolymers, which can be prepared in the same manner as conventional D-A ...

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Synthesis and Characterization of Two-Dimensional Conjugated Polymers Incorporating Electron-Deficient Moieties for Application in Organic Photovoltaics

Cited by 4 publications

References 45 publications

Improving Photovoltaic Properties of P3HT:IC60BA through the Incorporation of Small Molecules

Improving Photovoltaic Properties of P3HT:IC60BA through the Incorporation of Small Molecules

Optical Properties and Amplified Spontaneous Emission of Novel MDMO-PPV/C500 Hybrid

Conjugated D–A terpolymers for organic field-effect transistors and solar cells

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