Doping-induced decomposition of organic semiconductors: a caveat to the use of Lewis acid p-dopants

Rotas, Georgios; Antoniou, Giannis N.; Papagiorgis, Paris; Basu, Aniruddha; Panidi, Julianna; Ufimkin, Petr; Tsetseris, Leonidas; Itskos, Grigorios; Heeney, Martin; Anthopoulos, Thomas D.; Vougioukalakis, Georgios C.; Keivanidis, Panagiotis E.

doi:10.1039/d2tc03048a

Cited by 3 publications

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References 57 publications

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“…[ 39,40 ] However, less attention has been paid to the characteristics of OTEDs with triarylamine‐based polymers of which electrical conductivity can be enhanced by Lewis acid‐doping methods. [ 41–43 ]…”

Section: Introductionmentioning

confidence: 99%

“…[39,40] However, less attention has been paid to the characteristics of OTEDs with triarylamine-based polymers of which electrical conductivity can be enhanced by Lewis acid-doping methods. [41][42][43] In this work, we tried to investigate the thermoelectric characteristics of poly[N,N 0 -bis(4-butylphenyl)-N,N 0 -bis(phenyl)benzidine] (PolyTPD) which is doped with tris(pentafluorophenyl) borane (BCF) at various doping ratios. The OTEDs with a horizontal geometry were fabricated to examine thermoelectric performances by forming two parallel silver (Ag) electrodes on the BCF-doped PolyTPD (PolyTPD:BCF) films.…”

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confidence: 99%

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Contact/Noncontact‐Mode Thermoelectric Characteristics of Polytriarylamine/Lewis Acid Complex Films in Horizontal Device Geometry

Lee

Kim

2023

Adv Energy and Sustain Res

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Herein, the thermoelectric characteristics of polytriarylamine‐Lewis acid complex films were investigated by employing a horizontal device structure. Poly[N,N′‐bis(4‐butylphenyl)‐N,N′‐bis(phenyl)benzidine] (PolyTPD) is doped with tris(pentafluorophenyl)borane (BCF) via Lewis acid–base reactions by varying the BCF molar ratio (0–300 mol%). The resulting PolyTPD:BCF films are spun on glass substrates and silver electrodes are deposited leading to the horizontal type of organic thermoelectric devices (OTEDs). The OTEDs with the PolyTPD:BCF films are examined by varying temperature differences up to 45 K between two silver electrodes directly contacting hot/cold sources. Both device current and voltage are proportionally increased with the temperature difference, leading to higher powers at larger temperature differences, irrespective of BCF molar ratio. However, the highest current is achieved at 50 mol% owing to the highest electrical conductivity, even though the device voltage is slightly lower at 50 than 20 mol%. The origin of high electrical conductivity is assigned to the formation of radical cations in PolyTPD chains by BCF doping, which is influenced by the reaction time. The device current can be also generated by the illumination of IR radiation (noncontact mode) that is away from the OTEDs with the PolyTPD:BCF films.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Contact/Noncontact‐Mode Thermoelectric Characteristics of Polytriarylamine/Lewis Acid Complex Films in Horizontal Device Geometry

Lee

Kim

2023

Adv Energy and Sustain Res

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Wafer‐Scale Epitaxial Growth of Two‐dimensional Organic Semiconductor Single Crystals toward High‐Performance Transistors

et al. 2023

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The success of state‐of‐the‐art electronics and optoelectronics relies heavily on the capability to fabricate semiconductor single‐crystal wafers. However, the conventional epitaxial growth strategy for inorganic wafers is invalid for growing organic semiconductor single crystals due to the lack of lattice‐matched epitaxial substrates and intricate nucleation behaviors, severely impeding the advancement of organic single‐crystal electronics. Here, an anchored crystal‐seed epitaxial growth method for wafer‐scale growth of 2D organic semiconductor single crystals is developed for the first time. The crystal seed is firmly anchored on the viscous liquid surface, ensuring the steady epitaxial growth of organic single crystals from the crystal seed. The atomically flat liquid surface effectively eliminates the disturbance from substrate defects and greatly enhances the 2D growth of organic crystals. Using this approach, a wafer‐scale few‐layer bis(triethylsilythynyl)‐anthradithphene (Dif‐TES‐ADT) single crystal is formed, yielding a breakthrough for organic field‐effect transistors with a high reliable mobility up to 8.6 cm2 V−1 s−1 and an ultralow mobility variable coefficient of 8.9%. This work opens a new avenue to fabricate organic single‐crystal wafers for high‐performance organic electronics.

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Conjugated Polymers: Where We Come From, Where We Stand, and Where We Might Go

Müllen

Scherf

2022

Macro Chemistry & Physics

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Conjugated polymers (CPs) are electronic materials which always attract the joint attention of synthetic chemistry, physics, and engineering. The present article deals with "classical" CPs such as polyacetylenes and polyarylenes, and also with more sophisticated cases such as ladder polymers and graphene nanoribbons. CPs exhibit a wide variety of fascinating electrical and optical properties which qualify them as active components of devices. Their performance, however, is shown to sensitively depend upon structural perfection and purity as well as on the thin-film morphology, which is also influenced by processing procedures. Nowadays, the need for innovative energy technologies and sustainable materials and processes as well as the emerging new opportunities of quantum technologies, are adding further momentum to CP research.

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Doping-induced decomposition of organic semiconductors: a caveat to the use of Lewis acid p-dopants

Abstract: Solution-processable dopants are popular wet-lab mediators to engineer the electronic properties of organic semiconductors and to optimize the level performance of their corresponding devices. Nonetheless, the exact doping mechanism that...

Cited by 3 publications

References 57 publications

Contact/Noncontact‐Mode Thermoelectric Characteristics of Polytriarylamine/Lewis Acid Complex Films in Horizontal Device Geometry

Contact/Noncontact‐Mode Thermoelectric Characteristics of Polytriarylamine/Lewis Acid Complex Films in Horizontal Device Geometry

Wafer‐Scale Epitaxial Growth of Two‐dimensional Organic Semiconductor Single Crystals toward High‐Performance Transistors

Conjugated Polymers: Where We Come From, Where We Stand, and Where We Might Go

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