Photovoltaic performance of ladder-type indacenodithieno[3,2-b]thiophene-based polymers with alkoxyphenyl side chains

Zang, Yue; Xu, Yun‐Xiang; Chueh, Chu Chen; Li, Chang‐Zhi; Chen, Hsiu Cheng; Wei, Kung‐Hwa; Jun, Yu; Jen, Alex K.‐Y.

doi:10.1039/c5ra01763g

Cited by 7 publications

(4 citation statements)

References 28 publications

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“…It showed 12 nm bathochromic shift from solution to thin film that is indicative of chain planarization and strong aggregation of polymer in thin film. 28 In addition to this, it showed a vibronic shoulder in thin film as a consequence of stronger interchain π-π stacking of the polymer chains in thin film. P1 has two absorption peaks in solution at around 547/588 nm and it did not show any redshift although intensity of peak at longer wavelength is changed.…”

Section: Optical Propertiesmentioning

confidence: 85%

Benzodithiophene and Benzotriazole Bearing Conjugated Polymers for Electrochromic and Organic Solar Cell Applications

Ünlü¹,

Hacıoğlu²,

Hizalan³

et al. 2017

J. Electrochem. Soc.

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Herein, alternating donor-acceptor type benzodithiophene and benzotriazole bearing copolymers were synthesized and thieno [3,2-b]thiophene and furan units were incorporated as π-bridges. The application of these polymers for electrochromic and photovoltaic studies were performed. Spectroelectrochemical studies illustrate that both polymers showed multichromic behavior due to tailoring of polaron bands in visible region. Photovoltaic properties of P2 were performed by conventional device structure. The best performance device based on P2: PC 71 BM (1:3, w/w) exhibited the power conversion efficiency of 2.98%, with V oc of 0.74 V, J sc of 6.31 mA/cm 2 , and FF of 64%. The carrier mobility of the P2: PC 71 BM was calculated as 1.37 × 10 −3 cm 2 /V.s via space-charge-limited current method.

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Section: Optical Propertiesmentioning

confidence: 85%

Benzodithiophene and Benzotriazole Bearing Conjugated Polymers for Electrochromic and Organic Solar Cell Applications

Ünlü¹,

Hacıoğlu²,

Hizalan³

et al. 2017

J. Electrochem. Soc.

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“…Indacenodithieno[3,2‐ b ]thiophene (IDTT) has enforced planarization which an suppress intramolecular rotation and enhance π‐electron delocalization. IDTT‐based polymers exhibited hole mobility of 0.024 cm 2 V −1 s −1 in OFETs and PCEs of up to 7% in OSCs . In our previous works, we reported a series of small molecules based on IDTT and used as non‐fullerene acceptors in OSCs, which exhibited PCEs as high as 12.1% .…”

Section: Introductionmentioning

confidence: 96%

Bay‐annulated indigo based near‐infrared sensitive polymer for organic solar cells

Zhu

Shi

et al. 2017

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

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A new conjugated polymer (PBAIIDTT) based on bay‐annulated indigo and indacenodithieno[3,2‐b]thiophene was designed, synthesized, and characterized. PBAIIDTT shows strong absorption in 400–500 and 600–800 nm, and its HOMO and LUMO energy levels are −5.45 eV and −3.65 eV, respectively. In organic field‐effect transistors, the polymer exhibits a relatively high hole mobility of 0.39 cm2 V−1 s−1. PBAIIDTT was added to poly(3‐hexylthiophene) (P3HT) and phenyl‐C61‐butyric acid methyl ester (PC61BM) based organic solar cells. Ternary blend solar cells with 10% PBAIIDTT show an increased short circuit current density due to the broadened photocurrent generated in the near‐infrared region, and a power conversion efficiency of 3.78%, which is higher than that of the P3HT:PC61BM binary control devices (3.33%). © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018, 56, 213–220

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“…The long wavelength absorption band of 554 nm disappears from the PIDTT-DTffBTA solution to its film. The backbone planarity may be disturbed seriously when the twisted chains of PIDTT-DTffBTA are forced to pack together in the film. , While J52 exhibits a red-shifted absorption profile (from 583 to 593 nm) with a more pronounced shoulder peak in the film, this phenomenon implies that J52 shows the stronger intermolecular interaction, which is ascribed to the increased backbone coplanarity (see below). The optical bandgaps are estimated to be 2.02 and 1.95 eV for PIDTT-DTffBTA and J52, respectively.…”

mentioning

confidence: 99%

Indacenodithieno[3,2-b]thiophene-Based Wide Bandgap D-π-A Copolymer for Nonfullerene Organic Solar Cells

Tang

Zhang

et al. 2019

ACS Macro Lett.

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Herein, a wide-bandgap (2.02 eV) donor-π-acceptor (D-π-A) polymer PIDTT-DTffBTA, composed of a rigid indacenodithieno[3,2b]thiophene (IDTT) and fluorinated benzo [d][1,2,3]triazole (ffBTA) units as D and A units, respectively, is synthesized. In comparison with its analogue benzodithiophene-alt-benzotriazole copolymer J52 with classic benzodithiophene (BDT) as the D unit, PIDTT-DTffBTA demonstrates a lower-lying HOMO energy level and higher carrier mobilities when paired with a nonfullerene acceptor (NFA) Y6 based on a ladder-type dithienothiophen[3.2-b]-pyrrolobenzothiadiazole central unit. Thus, PIDTT-DTffBTA:Y6 based organic solar cells (OSCs) exhibit an improved power conversion efficiency (PCE) of 11.05% than that of J52:Y6 (7.15%), which is also the highest value for IDTT-based photovoltaic polymers. This result proves that the IDTT unit is also a promising building block to construct not only NFAs but also p-type photovoltaic polymers.

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Photovoltaic performance of ladder-type indacenodithieno[3,2-b]thiophene-based polymers with alkoxyphenyl side chains

Abstract: Ladder polymers deliver over 5% power conversion efficiencies in polymer solar cells made without engaging post-solvent or additive treatments.

Cited by 7 publications

References 28 publications

Benzodithiophene and Benzotriazole Bearing Conjugated Polymers for Electrochromic and Organic Solar Cell Applications

Benzodithiophene and Benzotriazole Bearing Conjugated Polymers for Electrochromic and Organic Solar Cell Applications

Bay‐annulated indigo based near‐infrared sensitive polymer for organic solar cells

Indacenodithieno[3,2-b]thiophene-Based Wide Bandgap D-π-A Copolymer for Nonfullerene Organic Solar Cells

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