Biaxially-extended side-chain engineering of benzodithiophene-based conjugated polymers and their applications in polymer solar cells

Wong, Yu-Tai; Lin, Po‐Chen; Tseng, Ching-Jung; Huang, Yen-Wen; Su, Yuan; Chen, Wen‐Chang; Chueh, Chu‐Chen

doi:10.1016/j.orgel.2020.105630

Cited by 13 publications

(15 citation statements)

References 52 publications

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“…The CV characteristic of PBDT-2T is shown in Figure S5 and the CV curves of the rest polymers could be found in our recent work. 28 Table 1 summarizes the relevant values of these polymers. All these polymers have a very similar bandgap of 1.73−1.75 eV, which is not affected by the employed conjugated side chains.…”

Section: ■ Materials Design and Characterizationmentioning

confidence: 99%

Structure–Mobility Relationship of Benzodithiophene-Based Conjugated Polymers with Varied Biaxially Extended Conjugated Side Chains

Huang

Lin

et al. 2020

Ind. Eng. Chem. Res.

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Semi-two-dimensional (semi-2D) benzo[1,2-b:4,5-b′]dithiophene (BDT)-based donor–acceptor copolymers have been regarded as one of the most successful organic semiconductors for photovoltaic applications. In this work, the structure–mobility relationship of four semi-2D BDT-based polymers bearing different kinds of conjugated side chains, including alkyl-monothienyl (T), alkyl-dithienyl (2T), branched alkyl-trithienyl (3T), and alkyl-benzotrithienyl (B3T), is thoroughly investigated. Because of the lower rigidity and the higher spatial mobility, the polymers owning lineally extended conjugated side chains, like PBDT-T and PBDT-2T, still possess certain crystallinity after thermal annealing. However, the crystallinity becomes evanescent as the side-chain conjugation further increases. PBDT-3T and PBDT-B3T bearing a large, branched conjugated side chain become nearly amorphous even after thermal annealing. Despite the low crystallinity, all these semi-2D polymers can still deliver decent hole mobility (μh) of >0.1 cm2 V–1 s–1 after thermal annealing. More interestingly, the amorphous PBDT-3T can deliver a maximum μh value of 0.4 cm2 V–1 s–1, outperforming the value of reference semicrystalline PBDT-T that owns a typical thienyl side chain. Based on the analyses of film morphology and solid-state crystallinity, the hyper-conjugated side chain with intense aggregation tendency is suggested to facilitate the intermittent interchain hopping between polymer chains, which compensates the short-range structural order of low-crystalline polymer to ensure the laudable charge carrier transport property. This work systematically explores the charge carrier transport behaviors of semi-2D polymers with varied biaxially extended conjugated side chains and enlightens a new design strategy to improve the charge carrier transport of low-crystalline polymers.

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Section: ■ Materials Design and Characterizationmentioning

confidence: 99%

Structure–Mobility Relationship of Benzodithiophene-Based Conjugated Polymers with Varied Biaxially Extended Conjugated Side Chains

Huang

Lin

et al. 2020

Ind. Eng. Chem. Res.

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“…For this they were awarded with the Nobel Prize in 2000 for their research on conductive polymers [ 1 , 2 ]. These materials have induced the development of many applications, such as organic light emitting diodes (OLEDs) [ 3 , 4 , 5 , 6 ], organic field effect transistors (OFETs) [ 7 , 8 , 9 , 10 , 11 ], dye-sensitized solar cells [ 12 , 13 , 14 , 15 , 16 ], photochromic dyes [ 17 , 18 , 19 , 20 , 21 ], batteries [ 22 , 23 , 24 , 25 , 26 ], and electrocatalyst [ 27 , 28 ] or (bio)sensors [ 26 , 29 , 30 , 31 , 32 ]…”

Section: Introductionmentioning

confidence: 99%

“…For this they were awarded with the Nobel Prize in 2000 for their research on conductive polymers [1,2]. These materials have induced the development of many applications, such as organic light emitting diodes (OLEDs) [3][4][5][6], organic field effect transistors (OFETs) [7][8][9][10][11], dye-sensitized solar cells [12][13][14][15][16], photochromic dyes [17][18][19][20][21], batteries [22][23][24][25][26], and electrocatalyst [27,28] or (bio)sensors [26,[29][30][31][32] field effect transistors (OFETs) [7][8][9][10][11], dye-sensitized solar cells [12][13][14][15][16], photochromic dyes [17][18][19][20][21], batteries …”

Section: Introductionmentioning

confidence: 99%

“…Polymers 2020, 12, x FOR PEER REVIEW 2 of 33 field effect transistors (OFETs) [7][8][9][10][11], dye-sensitized solar cells [12][13][14][15][16], photochromic dyes [17][18][19][20][21], batteries [22][23][24][25][26], and electrocatalyst [27,28] or (bio)sensors [26,[29][30][31][32] The term conductive polymer encompasses both organic molecules containing of alternating simple (type σ) and double (type π) carbon bonds and/or conjugated aromatic nuclei on their skeleton. This particularity, π-conjugated structure, allows the transfer of charges (electrons or holes) along the macromolecular skeleton.…”

Section: Introductionmentioning

confidence: 99%

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Polycarbazole and Its Derivatives: Synthesis and Applications. A Review of the Last 10 Years

et al. 2020

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Polycarbazole and its derivatives have been extensively used for the last three decades, although the interest in these materials briefly decreased. However, the increasing demand for conductive polymers for several applications such as light emitting diodes (OLEDs), capacitators or memory devices, among others, has renewed the interest in carbazole-based materials. In this review, the synthetic routes used for the development of carbazole-based polymers have been summarized, reviewing the main synthetic methodologies, namely chemical and electrochemical polymerization. In addition, the applications reported in the last decade for carbazole derivatives are analysed. The emergence of flexible and wearable electronic devices as a part of the internet of the things could be an important driving force to renew the interest on carbazole-based materials, being conductive polymers capable to respond adequately to requirement of these devices.

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“…[28][29][30] Again, based on the optimized binary PSCs, the ternary strategy of employing an appropriate third component is another promising method to boost the device efficacy. [31][32][33][34][35][36] First, the photocurrent can be increased by using two absorption-complementary molecules (between donor and acceptor or two donors/acceptors) [37][38][39] as one of the ternary strategies. The use of solar photons absorbed by the third component, such as via the energy transfer channel 40,41 in combination with the improvement in film-morphology, can lead to simultaneous enhancement of short-circuit current-density ( J SC ) and fill factor (FF) or open-circuit voltage (V OC ).…”

Section: Introductionmentioning

confidence: 99%

Synthesizing alkynyl-decorated 2D conjugated nonfullerene acceptors for efficient polymer solar cells

Liu

et al. 2021

Mater. Chem. Front.

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Biaxially-extended side-chain engineering of benzodithiophene-based conjugated polymers and their applications in polymer solar cells

Cited by 13 publications

References 52 publications

Structure–Mobility Relationship of Benzodithiophene-Based Conjugated Polymers with Varied Biaxially Extended Conjugated Side Chains

Structure–Mobility Relationship of Benzodithiophene-Based Conjugated Polymers with Varied Biaxially Extended Conjugated Side Chains

Polycarbazole and Its Derivatives: Synthesis and Applications. A Review of the Last 10 Years

Synthesizing alkynyl-decorated 2D conjugated nonfullerene acceptors for efficient polymer solar cells

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