Wide band gap pyromellitic diimides for photo stable n-channel thin film transistors

Wang, Jianbo; Yu, Haoran; Fu, Tianchen; Zhao, Changbin; Yu, Hongtao; Liu, Zhijun; He, Qiang; Zhang, Dongwei; Meng, Hong; Huang, Wei

doi:10.1039/d0tc00862a

Cited by 12 publications

(7 citation statements)

References 49 publications

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“…The dynamics of photogenerated excitons in OSCs mainly consist of the following processes: (i) exciton generation upon light absorption, (ii) exciton diffusion, (iii) exciton dissociation or quenching, and (iv) free carriers transport or exciton annihilation. − To suppress the photoelectric response of OFETs, some strategies such as synthesis of large-bandgap OSC molecules and reduction of trap density have been proposed to inhibit the exciton generation or exciton dissociation processes. − However, these methods are limited by the poor universality and the low tolerance to light (far behind the solar irradiance value of ∼138 mW/cm 2 ). Moreover, the suppression of the photoelectric response is highly challenging in the preferred polycrystalline OSC films in large-area organic electronics because exciton dissociation can be effectively promoted by the high-density charge traps …”

Section: Introductionmentioning

confidence: 99%

Polymer Electrolyte Dielectrics Enable Efficient Exciton-Polaron Quenching in Organic Semiconductors for Photostable Organic Transistors

Wang

Chen

et al. 2022

ACS Appl. Mater. Interfaces

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The photoelectric response of organic field-effect transistors (OFETs) will cause severe photoelectric interference, which hinders the applications of OFETs in the light environment. It is highly challenging to relieve this problem because of the high photosensitivity of most organic semiconductors. Here, we propose an efficient "exciton-polaron quenching" strategy to suppress the photoelectric response and thus construct highly photostable OFETs by utilizing a polymer electrolyte dielectricpoly(acrylic acid) (PAA). This dielectric produces high-density polarons in organic semiconductors under a gate electric field that quench the photogenerated excitons with high efficiency (∼70%). As a result, the OFETs with PAA dielectric exhibit unprecedented photostability against strong light irradiation up to 214 mW/ cm 2 , which far surpasses the reported values and solar irradiance value (∼138 mW/ cm 2 ). The strategy shows high universality in OFETs with different OSCs and electrolytes. As a demonstration, the photostable OFET can stably drive an organic light-emitting diode (OLED) under light irradiation. This work presents an efficient exciton modulation strategy in OSC and proves a high potential in practical applications.

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Section: Introductionmentioning

confidence: 99%

Polymer Electrolyte Dielectrics Enable Efficient Exciton-Polaron Quenching in Organic Semiconductors for Photostable Organic Transistors

Wang

Chen

et al. 2022

ACS Appl. Mater. Interfaces

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“…The respective HOMO and LUMO levels for C8‐PDI, C8‐NDI, C8‐PMDI are (−6.13, −4.11) eV, (−5.54, −2.48) eV, (−5.44, −0.88) eV. [ 38,39 ] A decreased trend in the energy levels and bandgap narrowing can be clearly seen with an extended conjugation from C8‐PMDI to C8‐PDI. Notably, the larger gap in LUMO levels between photogate and channel material can prevent carrier back‐trapping; while a lower‐lying HOMO level of the photogate is favorable for stabilizing trapped charges.…”

Section: Resultsmentioning

confidence: 99%

Liquid Crystalline Rylenediimides with Highly Order Smectic Layer Structure as a Floating Gate for Multiband Photoresponding Photonic Transistor Memory

Lin

Yang

et al. 2021

Adv Elect Materials

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With the growing demands of light fidelity technology, photonic transistor memory has gained considerable attention for next‐generation optoelectronic devices. In this work, alkylated rylenediimides of 2,9‐diphenethylanthra[2,1,9‐def:6,5,10‐d“e”f]diisoquinoline‐1,3,8,10(2H,9H)‐tetraone (C8‐PDI) and 2,7‐dioctylbenzo[lmn][3,8]phenanthroline‐1,3,6,8(2H,7H)‐tetraone (C8‐NDI), and pyromellitic diimide of 2,6‐dioctylpyrrolo[3,4‐f]isoindole‐1,3,5,7(2H,6H)‐tetraone (C8‐PMDI) have been used as floating gate electrets in the photonic field‐effect transistor‐type memory. The structure‐optics‐performance relationship of these rod‐like molecules has been systematically studied, and the memory device exhibited a decent response to photowriting and electrical erasing processes, owing to the 3D ordered smectic layer structure and brickwork stacking. Therefore, an evenly distributed photogating moiety, efficient exciton dissociation associated with decent carrier tunneling and charge trapping can be obtained. Among them, the sought‐after C8‐NDI presents favorable energy level alignment, multiband photoresponding, and an optimal block ratio. The fabricated photonic memory with C8‐NDI electret presented a remarkable memory switchability with a memory ratio of 104 and a stable memory ratio of 105 over 10,000 s. To the best of knowledge, this is the first work to utilize rylenediimides based liquid crystals as an efficient charge blocking electret, and these findings open an avenue for designing rod‐like molecules with highly ordered liquid crystalline properties in the ultrafast photomemory devices.

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“…Despite the low mobility, it also makes a meaningful demonstration that the wide band gap is beneficial to semiconductor materials exhibiting excellent high transparency. [ 110 ] Recently, an embedded nitrogenous anthracene derivative SM52 with two imine groups has been reported. [ 38 ] The advantage of this molecular design is that, on the one hand, the utilization of the two carbonyl groups of the imide substituent can effectively lower the LUMO energy level.…”

Section: Organic Small‐molecule Semiconductors With High Electron Mob...mentioning

confidence: 99%

Recent Research Progress of Organic Small‐Molecule Semiconductors with High Electron Mobilities

et al. 2023

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Organic electronics has made great progress in the past decades, which is inseparable from the innovative development of organic electronic devices and the diversity of organic semiconductor materials. It is worth mentioning that both of these great advances are inextricably linked to the development of organic high‐performance semiconductor materials, especially the representative n‐type organic small‐molecule semiconductor materials with high electron mobilities. The n‐type organic small molecules have the advantages of simple synthesis process, strong intermolecular stacking, tunable molecular structure, and easy to functionalize structures. Furthermore, the n‐type semiconductor is a remarkable and important component for constructing complementary logic circuits and p‐n heterojunction structures. Therefore, n‐type organic semiconductors play an extremely important role in the field of organic electronic materials and are the basis for the industrialization of organic electronic functional devices. This review focuses on the modification strategies of organic small molecules with high electron mobility at molecular level, and discusses in detail the applications of n‐type small‐molecule semiconductor materials with high mobility in organic field‐effect transistors, organic light‐emitting transistors, organic photodetectors, and gas sensors.

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Wide band gap pyromellitic diimides for photo stable n-channel thin film transistors

Abstract: Wide energy gaps of PyDI derivatives lead to excellent photostability in OFETs at illumination conditions and transparency on transparent substrates.

Cited by 12 publications

References 49 publications

Polymer Electrolyte Dielectrics Enable Efficient Exciton-Polaron Quenching in Organic Semiconductors for Photostable Organic Transistors

Polymer Electrolyte Dielectrics Enable Efficient Exciton-Polaron Quenching in Organic Semiconductors for Photostable Organic Transistors

Liquid Crystalline Rylenediimides with Highly Order Smectic Layer Structure as a Floating Gate for Multiband Photoresponding Photonic Transistor Memory

Recent Research Progress of Organic Small‐Molecule Semiconductors with High Electron Mobilities

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