The marriage of AIE and interface engineering: convenient synthesis and enhanced photovoltaic performance

Wang, Can; Liu, Zhiyang; Li, Mengshu; Xie, Yujun; Li, Bingshi; Xue, Sha; Peng, Qian; Chen, Bin; Zhao, Zujin; Li, Qianqian; Ge, Ziyi

doi:10.1039/c6sc05648b

Cited by 41 publications

(27 citation statements)

References 62 publications

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“…Aggregation-induced emission (AIE) is a novel photophysical phenomenon in which the luminogens are non-emissive in dilute solution but become highly emissive in aggregate state 40 , 41 . Since firstly coined by Tang and co-workers in 2001 42 , AIE luminogens (AIEgens) based materials have gained intensive attentions and shown broad applications in light-harvest 43 , light-emission 44 , chemo- and biosensors 45 , 46 , bioimaging 47 , and so on. The construction of AIEgen-based 3D COFs, which will precisely integrate AIEgens into 3D porous crystalline organic framework, should be very interesting 48 , 49 .…”

Section: Introductionmentioning

confidence: 99%

An AIEgen-based 3D covalent organic framework for white light-emitting diodes

et al. 2018

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The design and synthesis of three-dimensional covalent organic frameworks (3D COFs) have still been considered as a big challenge. Here we report the design and synthesis of an AIEgen-based 3D COF (3D-TPE-COF), with a high surface area (1084 m2 g−1). According to powder X-ray diffraction and continuous rotation electron diffraction analyses, 3D-TPE-COF is identified to adopt a seven-fold interpenetrated pts topology. Interestingly, 3D-TPE-COF emits yellow fluorescence upon excitation, with a photoluminescence quantum yield of 20%. Moreover, by simply coating 3D-TPE-COF onto a commercial blue light-emitting diode (LED), a prototype white LED (WLED) under continuously driving without degradation for 1200 h was demonstrated. The present work suggests the possibility of using COF materials for stable WLEDs, which will greatly inspire us to design and synthesize fluorescent 3D COFs and facilitate the development of COF-based WLEDs in future.

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Section: Introductionmentioning

confidence: 99%

An AIEgen-based 3D covalent organic framework for white light-emitting diodes

et al. 2018

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“…Additionally, these devices also showed higher air stability. [146] TPE-1 and TPE-2 (Scheme 2) showed the HOMO and LUMO energy levels of −5.20, −5.38 eV, and −2.80, −2.77 eV, subsequently, with the bandgaps of 2.40 and 2.61 eV ( Table 1). [143] NDIO was through a two-step facile mechanism from 1,4,5,8-naphthalenetetracarboxylic dianhydride and N,N-dimethyl-1,3-propane-diamine.…”

Section: Conjugated Small-molecule Zwitterions For Oscsmentioning

confidence: 99%

“…[143] NDIO was through a two-step facile mechanism from 1,4,5,8-naphthalenetetracarboxylic dianhydride and N,N-dimethyl-1,3-propane-diamine. [146] An increase in charge mobility indicated the reduction in charge-transport barrier at the active layer/electrode interface. A relatively deep HOMO energy level of −7.0 eV was estimated and LUMO energy level was found to be −3.98 eV (Table 1).…”

Section: Conjugated Small-molecule Zwitterions For Oscsmentioning

confidence: 99%

“…NDIO possessed very good water solubility, showed high transparency in visible light region, and well-matched energy levels. [146] Methanol treatment also made a significant impact to improve the device performance. [143] This ZEI decreased the WF of ITO to 3.96 eV.…”

Section: Conjugated Small-molecule Zwitterions For Oscsmentioning

confidence: 99%

“…Aggregation‐induced emission (AIE) molecules have received an extensive attention because of their feature of twisted geometrical configuration which facilitates to suppress π–π stacking interactions responsible for aggregation caused quenching effect. Making use of this property, Wang et al presented two novel cathode ZEIs consisting of tetraphenylethene (TPE) unit, a famous AIE luminogen . TPE‐1 and TPE‐2 ( Scheme 2 ) showed the HOMO and LUMO energy levels of −5.20, −5.38 eV, and −2.80, −2.77 eV, subsequently, with the bandgaps of 2.40 and 2.61 eV (Table ).…”

Section: State Of the Art And Recent Trendsmentioning

confidence: 99%

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Zwitterions for Organic/Perovskite Solar Cells, Light‐Emitting Devices, and Lithium Ion Batteries: Recent Progress and Perspectives

Islam

Pervaiz

et al. 2019

Advanced Energy Materials

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are covalently bonded and their unique characteristics enable them to demonstrate special performance in applications and distinguish them from other conventional organic salts. [12][13][14] Recently, a significant attention has been paid to the use of zwitterions owing to their solubility in polar solvents for solution processing, [15][16][17] and dipole formation for the transfer of carriers [18][19][20] and ions. [21][22][23] Zwitterions have emerged as alternatives to the widely used building blocks such as conventional ionic groups, for developing new functional materials. The presence of both negative and positive ions in the same molecule enables zwitterions to develop interfacial dipole. The ability of zwitterions to develop interfacial dipole provides a new pathway to utilize them as interfacial layer in optoelectronic devices, including organic solar cells (OSCs), perovskite solar cells (PVSCs), and organic light-emitting devices (OLEDs), as well as electrolyte additives for energy devices such as lithium ion batteries (LIBs).It is well known that the ability to transport the charge carriers between the electrodes and organic layers is very crucial to obtain highly efficient electronic devices. [24] A mismatch between the energy levels of organic layers and inorganic electrodes leads to the generation of an energy barrier that hampers the extraction or injection of charge carriers. [25] To get rid of this obstacle, an interlayer between the electrodes and organic layers is applied to facilitate the transfer of charges in organic devices. In OLEDs, interlayers are used to enhance charge injection and reduce the height of Schottky barrier. While in the case of OSCs and PVSCs, apart from the enhancement in charge injection, they also play an important role to increase the built-in electric field across the active layer, ensuring efficient extraction of photogenerated charge carriers. [26][27][28][29][30] Therefore, the design and development of effective interlayer materials for interfacial modification are crucial for high-performance electronic devices. Recently, some significant advances have been demonstrated by applying an interfacial layer between the electrodes and organic layers, resulting in power conversion efficiencies (PCEs) to exceed 14% for single-junction OSCs by choosing appropriate photoactive layer. [31,32] Among different interlayer materials used so far, zwitterionic materials have been proved Zwitterions, a class of materials that contain covalently bonded cations and anions, have been extensively studied in the past decades owing to their special features, such as excellent solubility in polar solvents, for solution processing and dipole formation for the transfer of carriers and ions. Recently, zwitterions have been developed as electrode modifiers for organic solar cells (OSCs), perovskite solar cells (PVSCs), and organic light-emitting devices (OLEDs), as well as electrolyte additives for lithium ion batteries (LIBs).With the rapid advances of zwitterionic materials, high-performan...

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Interfacial Design for Efficient Organic Solar Cells

Liu

2022

Organic Solar Cells

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The marriage of AIE and interface engineering: convenient synthesis and enhanced photovoltaic performance

Abstract: The first example of an AIE interfacial material is developed, with a high PCE of 8.94% being achieved for the TPE-2 modified conventional PC71BM:PTB7-based PSC.

Cited by 41 publications

References 62 publications

An AIEgen-based 3D covalent organic framework for white light-emitting diodes

An AIEgen-based 3D covalent organic framework for white light-emitting diodes

Zwitterions for Organic/Perovskite Solar Cells, Light‐Emitting Devices, and Lithium Ion Batteries: Recent Progress and Perspectives

Interfacial Design for Efficient Organic Solar Cells

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