Crystal Structure and Phototransistor Behavior of N-Substituted Heptacence

Wu, Yuechao; Yin, Zongyou; Xiao, Jinchong; Liu, Yi; Wei, Fengxia; Tan, Kwan Wee; Kloc, Christian; Huang, Ling; Yan, Qingyu; Hu, Fang‐Zhong; Zhang, Hua; Zhang, Qichun

doi:10.1021/am3003389

Cited by 126 publications

(65 citation statements)

References 34 publications

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“…The absorbed light excites the energy states of molecules to produce excitons or to induce molecular conformational changes (i.e., photoisomerization). OFETs effectively convert these light-stimulated states into electrical signals, opening a way to new optoelectronic devices, such as phototransistors, optical memory, and switching devices [15, 20, 67]. These light-receiving OFETs (LR-OFETs) are featured in this section.…”

Section: Light-receiving Ofetsmentioning

confidence: 99%

Recent progress in photoactive organic field-effect transistors

Wakayama

Hayakawa

Seo

2014

Science and Technology of Advanced Materials

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Recent progress in photoactive organic field-effect transistors (OFETs) is reviewed. Photoactive OFETs are divided into light-emitting (LE) and light-receiving (LR) OFETs. In the first part, LE-OFETs are reviewed from the viewpoint of the evolution of device structures. Device performances have improved in the last decade with the evolution of device structures from single-layer unipolar to multi-layer ambipolar transistors. In the second part, various kinds of LR-OFETs are featured. These are categorized according to their functionalities: phototransistors, non-volatile optical memories, and photochromism-based transistors. For both, various device configurations are introduced: thin-film based transistors for practical applications, single-crystalline transistors to investigate fundamental physics, nanowires, multi-layers, and vertical transistors based on new concepts.

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Section: Light-receiving Ofetsmentioning

confidence: 99%

Recent progress in photoactive organic field-effect transistors

Wakayama

Hayakawa

Seo

2014

Science and Technology of Advanced Materials

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“…[1] Thes tructures of N-PACsg reatly affect their electronic structures and properties such as HOMO-LUMO gaps,a bsorption and emission properties,r edox potentials,b asicity,m etallic coordination, biological activity,a nd supramolecular behavior. [2] Furthermore,u pon appropriate p-extension, N-PACsc an enter the realm of nitrogen-doped nanographenes,which are an emerging class of materials in molecular electronics and devices. [3] Owing to these beneficial uses,t here is substantial demand for efficient and precise synthetic methods for N-PACs.T ypical synthetic strategies for N-PACsr ely,h owever, on multistep reactions.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Nitrogen‐Containing Polyaromatics by Aza‐Annulative π‐Extension of Unfunctionalized Aromatics

et al. 2020

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Nitrogen‐containing polycyclic aromatic compounds (N‐PACs) are an important class of compounds in materials science. Reported here is a new aza‐annulative π‐extension (aza‐APEX) reaction that allows rapid access to a range of N‐PACs in 11–84 % yields from readily available unfunctionalized aromatics and imidoyl chlorides. In the presence of silver hexafluorophosphate, arenes and imidoyl chlorides couple in a regioselective fashion. The follow‐up oxidative treatment with p‐chloranil affords structurally diverse N‐PACs, which are very difficult to synthesize. DFT calculations reveal that the aza‐APEX reaction proceeds through the formal [4+2] cycloaddition of an arene and an in situ generated diarylnitrilium salt, with sequential aromatizations having relatively low activation energies. Transformation of N‐PACs into nitrogen‐doped nanographenes and their photophysical properties are also described.

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“…Their chemical and photo physical stability is better than that of the isolated molecules and they display their characteristic optical and optoelectronic properties. Therefore, they are of considerable interest for various potential applications in the field of photo switches [1], OLEDs [2,3], sensor [4][5][6][7], photo catalyst [8], phototransistors [9,10], memory devices [11], etc. Most of the organic chromospheres which are highly fluorescent in solution at low concentration show a drastic decrease of their emission efficiency in the solid state.…”

Section: Introductionmentioning

confidence: 99%