A Wide Bandgap Polymer with Strong π–π Interaction for Efficient Fullerene‐Free Polymer Solar Cells

Yao, Huifeng; Yu, Runnan; Shin, Tae Joo; Zhang, Hao; Zhang, Shaoqing; Jang, Bomee; Uddin, Mohammad Afsar; Woo, Han Young; Hou, Jianhui

doi:10.1002/aenm.201600742

Cited by 77 publications

(42 citation statements)

References 53 publications

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“…Under the same device processing conditions, the two polymer donors yielded moderate PCEs when PC 71 BM or IEICO were used as acceptor materials (Supporting Information, Table S1). Furthermore,weselected another four polymers,i ncluding PBDTTT-E-T, [35] PBDTS-DTBTO, [36] PBQ-3, [37] and PBDB-T [38] (Supporting Information, Figure S4), as donor materials for the fabrication of IEICO-4F-based devices because of their good applicability in fullerene-free OSC devices.T hese polymers have varied optical absorption bands (E opt g ranging from 1.55 to 1.77 eV), and the four OSC devices show V OC values ranging from 0.689 to 0.771 V. As presented in Table S2 (Supporting Information), the four devices all yielded J SC values over 20 mA cm À2 even though they have relatively low energy losses from 0.469 to 0.551 eV.…”

Section: Angewandte Chemiementioning

confidence: 99%

Design, Synthesis, and Photovoltaic Characterization of a Small Molecular Acceptor with an Ultra‐Narrow Band Gap

et al. 2017

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The design of narrow band gap (NBG) donors or acceptors and their application in organic solar cells (OSCs) are of great importance in the conversion of solar photons to electrons. Limited by the inevitable energy loss from the optical band gap of the photovoltaic material to the open-circuit voltage of the OSC device, the improvement of the power conversion efficiency (PCE) of NBG-based OSCs faces great challenges. A novel acceptor-donor-acceptor structured non-fullerene acceptor is reported with an ultra-narrow band gap of 1.24 eV, which was achieved by an enhanced intramolecular charge transfer (ICT) effect. In the OSC device, despite a low energy loss of 0.509 eV, an impressive short-circuit current density of 25.3 mA cm is still recorded, which is the highest value for all OSC devices. The high 10.9 % PCE of the NBG-based OSC demonstrates that the design and application of ultra-narrow materials have the potential to further improve the PCE of OSC devices.

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Section: Angewandte Chemiementioning

confidence: 99%

Design, Synthesis, and Photovoltaic Characterization of a Small Molecular Acceptor with an Ultra‐Narrow Band Gap

et al. 2017

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“…Organic solar cells (OSCs) based on binary active layers have been intensively investigated in past decades . Nevertheless, the narrow optical absorption spectrum of organic semiconductors resulting from the electron hopping between the discontinuous energy bands makes it challenging to gain panchromatic absorption coverage in OSCs, even by combining a donor and an acceptor with complementary absorption bands . To solve this problem, tandem OSCs composed of multiple active layers have been designed, while the complicated fabrication processes of these types of devices may impede their practical applications .…”

Section: Photovoltaic Parameters For J52:it‐m:ieico With Various Ratiosmentioning

confidence: 99%

Two Well‐Miscible Acceptors Work as One for Efficient Fullerene‐Free Organic Solar Cells

et al. 2017

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High-performance ternary organic solar cells are fabricated by using a wide-bandgap polymer donor (bithienyl-benzodithiophene-alt-fluorobenzotriazole copolymer, J52) and two well-miscible nonfullerene acceptors, methyl-modified nonfullerene acceptor (IT-M) and 2,2'-((2Z,2'Z)-((5,5'-(4,4,9,9-tetrakis(4-hexylphenyl)-4,9-dihydros-indaceno[1,2-b:5,6-b']dithiophene-2,7-diyl)bis(4-((2-ethylhexyl)oxy)thiophene-5,2-diyl))bis(methanylylidene))bis(3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile (IEICO). The two acceptors with complementary absorption spectra and similar lowest unoccupied molecular orbital levels show excellent compatibility in the blend due to their very similar chemical structures. Consequently, the obtained ternary organic solar cells (OSC) exhibits a high efficiency of 11.1%, with an enhanced short-circuit current density of 19.7 mA cm and a fill factor of 0.668. In this ternary system, broadened absorption, similar output voltages, and compatible morphology are achieved simultaneously, demonstrating a promising strategy to further improve the performance of ternary OSCs.

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“…Polymer solar cells have many advantages, such as lightweight, flexibility, transparency, and ease of manufacturing (by rolling, coating, or printing techniques) for mass production . In addition, the performance of the polymer solar cells can be remarkably improved by designing the proper structure of polymer to be able to adjust the band gap and the energy level; also, it is easy to integrate polymer solar cells with other devices with different functions . Thus, the study on integration of a polymer solar cell and a supercapacitor into a single device, namely polymer solar cell type photo‐supercapacitor (PSPS), has been started after DSSCPSs.…”

Section: The Types Of Photo‐supercapacitorsmentioning

confidence: 99%

Recent Advances in Dual‐Functional Devices Integrating Solar Cells and Supercapacitors

Sun

Yan

2017

Solar RRL

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Although solar cell technology is an effective way to realize the utilization of solar energy, the output power of solar cells cannot be continuous and stable, due to the intermittent nature of the sunlight. Therefore, proper energy storage devices are generally required to store the generated energy of solar cells. Photo‐supercapacitor is a new energy device that combines the photoelectric conversion function of a solar cell with the energy storage capability of a supercapacitor. This dual‐functionality is the main reason why photo‐supercapacitors are receiving more and more interest for their potential applications in future portable and wearable devices. This review presents the development history and the representative research progress of various photo‐supercapacitors, as well as the problems and challenges that still need to be addressed for the construction of better photo‐supercapacitors. Finally, suggestions for future research directions and opportunities in this fascinating field are given.

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A Wide Bandgap Polymer with Strong π–π Interaction for Efficient Fullerene‐Free Polymer Solar Cells

Cited by 77 publications

References 53 publications

Design, Synthesis, and Photovoltaic Characterization of a Small Molecular Acceptor with an Ultra‐Narrow Band Gap

Design, Synthesis, and Photovoltaic Characterization of a Small Molecular Acceptor with an Ultra‐Narrow Band Gap

Two Well‐Miscible Acceptors Work as One for Efficient Fullerene‐Free Organic Solar Cells

Recent Advances in Dual‐Functional Devices Integrating Solar Cells and Supercapacitors

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