Development of a donor polymer using a B ← N unit for suitable LUMO/HOMO energy levels and improved photovoltaic performance

Zhang, Zijian; Ding, Zicheng; Dou, Chuandong; Li, Jun; Wang, Lixiang

doi:10.1039/c5py01389e

Cited by 33 publications

(18 citation statements)

References 58 publications

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“…Polymers containing B←N‐bridged thienylthiazole (124b) were synthesized to compare with thienylthiazole‐based homopolymers (124a). [ 185 ] The B←N‐embedded 98b showed a much lower HOMO/LUMO (−5.20/−3.23 vs. −4.98/−2.71 eV) and narrower optical bandgap (1.73 vs. 1.85 eV) than these values of 124a. To this end, from 124a to 124b, V OC s were remarkably increased from 0.45 to 0.82 V and the PCEs were obviously enhanced from 0.63% to 3.74%.…”

Section: B←n‐embedded Opv Materialsmentioning

confidence: 99%

B←N Coordination: From Chemistry to Organic Photovoltaic Materials

Huang

Wang

Xiang

et al. 2021

Adv Energy and Sustain Res

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Coordination between boron Lewis acid and nitrogen Lewis base (B←N) is a classically chemical issue that has been known for several decades. Recently, this B←N chemistry developed into a new stage toward electronic materials, e.g., adjusting optoelectronic properties of N‐based conjugated molecules via adding B Lewis acids, synthesizing B←N‐bridged conjugated units, and further constructing B←N‐embedded organic photovoltaic (OPV) materials. Herein, these progresses are systematically summarized starting from certain chemical issues concerning B←N coordination, e.g., Lewis acidity of typical B Lewis acids and their interactions with N‐contained conjugated molecules. Then, some fused and ladder‐type B←N‐bridged units are reviewed in terms of the relationship between molecular structures and optoelectronic properties. Finally, the recently flourished B←N‐embedded OPV materials are summarized. The prospect of OPV materials concerning B←N coordination is also proposed, hoping to attract more attention to this filed and motivate its rolling rapidly.

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Section: B←n‐embedded Opv Materialsmentioning

confidence: 99%

B←N Coordination: From Chemistry to Organic Photovoltaic Materials

Huang

Wang

Xiang

et al. 2021

Adv Energy and Sustain Res

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“…Voc (V) Jsc (mA/cm2) FF (%) PCE (%) To be used as donor materials, a common strategy is to prepare D-A molecular architecture, which offers tunable LUMO/HOMO energy levels as a low FO level is helpful for harvesting sunlight. Since B-N based materials offer such opportunity, Wang et al [78] compared the efficiency of polymers 36 (Figure 15). Clearly, the replacement of C-C unit by a B ← N unit significantly altered the frontier energy levels and PV performance.…”

Section: Donorsmentioning

confidence: 99%

Recent Advances in π-Conjugated N^C-Chelate Organoboron Materials

et al. 2020

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Boron-containing π-conjugated materials are archetypical candidates for a variety of molecular scale applications. The incorporation of boron into the π-conjugated frameworks significantly modifies the nature of the parent π-conjugated systems. Several novel boron-bridged π-conjugated materials with intriguing structural, photo-physical and electrochemical properties have been reported over the last few years. In this paper, we review the properties and multi-dimensional applications of the boron-bridged fused-ring π-conjugated systems. We critically highlight the properties of π-conjugated N^C-chelate organoboron materials. This is followed by a discussion on the potential applications of the new materials in opto-electronics (O-E) and other areas. Finally, attempts will be made to predict the future direction/outlook for this class of materials.

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“…On the other hand, the BNCPT was also adopted to construct electron donor polymers by copolymerizing with its all-carbon analog CPT. This polymer displayed suitable HOMO and LUMO levels and exhibited a PCE of 3.74% by using PC71BM as electron acceptor (Zhang et al, 2015 ). These pioneering studies on the application of B←N based units to the OPV materials open a new window for the design of novel and highly efficient photovoltaic materials, not only for the polymers, but also for the small molecules.…”

Section: Optoelectronic Properties and Opv Applicationsmentioning

confidence: 99%

BN Embedded Polycyclic π-Conjugated Systems: Synthesis, Optoelectronic Properties, and Photovoltaic Applications

Huang

2018

Front. Chem.

109

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In the periodic table of elements, boron (B, atomic number, 5) and nitrogen (N, atomic number, 7) are neighboring to the carbon (C, atomic number, 6). Thus, the total electronic number of two carbons (12) is equal to the electronic sum of one boron (5) and one nitrogen (7). Accordingly, replacing two carbons with one boron and one nitrogen in a π-conjugated structure gives an isoelectronic system, i.e., the BN perturbed π-conjugated system, comparing to their all-carbon analogs. The BN embedded π-conjugated systems have unique properties, e.g., optical absorption, emission, energy levels, bandgaps, and packing order in contrast to their all-carbon analogs and have been intensively studied in terms of novel synthesis, photophysical characterizations, and electronic applications in recent years. In this review, we try to summarize the synthesis methods, optoelectronic properties, and progress in organic photovoltaic (OPV) applications of the representative BN embedded polycyclic π-conjugated systems. Firstly, the narrative will be commenced with a general introduction to the BN units, i.e., B←N coordination bond, B-N covalent bond, and N-B←N group. Then, the representative synthesis strategies toward π-conjugated systems containing B←N coordination bond, B-N covalent bond, and N-B←N group will be summarized. Afterwards, the frontier orbital energy levels, optical absorption, packing order in solid state, charge transportation ability, and photovoltaic performances of typical BN embedded π-conjugated systems will be discussed. Finally, a prospect will be proposed on the OPV materials of BN doped π-conjugated systems, especially their potential applications to the small molecules organic solar cells.

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Development of a donor polymer using a B ← N unit for suitable LUMO/HOMO energy levels and improved photovoltaic performance

Cited by 33 publications

References 58 publications

B←N Coordination: From Chemistry to Organic Photovoltaic Materials

B←N Coordination: From Chemistry to Organic Photovoltaic Materials

Recent Advances in π-Conjugated N^C-Chelate Organoboron Materials

BN Embedded Polycyclic π-Conjugated Systems: Synthesis, Optoelectronic Properties, and Photovoltaic Applications

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