High-Quality Large-Size Organic Crystals Prepared by Improved Physical Vapor Growth Technique and Their Optical Gain Properties

Yang, Jie; Fang, Hong‐Hua; Ding, Ran; Lu, Shengfu; Zhang, Yong‐Lai; Chen, Qi‐Dai; Sun, Hong–Bo

doi:10.1021/jp110646n

Cited by 29 publications

(27 citation statements)

References 42 publications

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“…All organic crystals were grown by a physical vapor transport method using the mixed powder. The apparatus for the preparation of the crystals are very similar with that reported in the literature [16], as displayed in Fig. 1.…”

Section: Growth Of Crystalssupporting

confidence: 52%

“…For producing reliable high-quality devices, the preferred organic semiconductor must be well ordered and stable with closely-packed molecules having few defects between molecules or domains. The long-range order presented in thin films of crystalline organic semiconductors results in high charge carrier mobility and some of the crystals exhibit high luminescence efficiency making them superior in electronic and optical performance [8,[10][11][12][13][14][15][16][17][18][19]. Enormous recent efforts have brought significant progresses in the growth of organic single crystals, the fabrication of single crystal devices and the investigation of structure-properties relationship of organic semiconductors based on the crystals [8,11,16,[19][20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

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Preparation and time-resolved fluorescence study of RGB organic crystals

Fang

Wang

et al. 2013

Organic Electronics

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Section: Growth Of Crystalssupporting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Preparation and time-resolved fluorescence study of RGB organic crystals

Fang

Wang

et al. 2013

Organic Electronics

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“…Although different OSSC patterns have been achieved via the modified PVT method, the alignment/positioning of OSSCs with a high degree of orientation over large areas through this strategy remains an open question. Additionally, large‐sized OSSCs can be grown by modulating the PVT conditions from vacuum to inert gas under ambient pressure, and various millimeter‐ and even centimeter‐sized crystals, for example, of rubrene, tetracene, perylene, tetrathiafulvalene (TTF), 7,7,8,8‐tetracyanoquinodimethane (TCNQ), BSB‐Me, and BP3T, have been achieved via such vapor process . However, most large‐sized OSSCs have high thicknesses, generally several hundreds of nanometers or even micrometers, which is unfavorable for devices and circuits, such as OFETs and OLETs, though such designs have been used in photonic devices.…”

Section: High‐performance Optoelectronic Materials For Osscsmentioning

confidence: 99%

Organic Semiconductor Single Crystals for Electronics and Photonics

2018

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Organic semiconducting single crystals (OSSCs) are ideal candidates for the construction of high-performance optoelectronic devices/circuits and a great platform for fundamental research due to their long-range order, absence of grain boundaries, and extremely low defect density. Impressive improvements have recently been made in organic optoelectronics: the charge-carrier mobility is now over 10 cm V s and the fluorescence efficiency reaches 90% for many OSSCs. Moreover, high mobility and strong emission can be integrated into a single OSSC, for example, showing a mobility of up to 34 cm V s and a photoluminescence yield of 41.2%. These achievements are attributed to the rational design and synthesis of organic semiconductors as well as improvements in preparation technology for crystals, which accelerate the application of OSSCs in devices and circuits, such as organic field-effect transistors, organic photodetectors, organic photovoltaics, organic light-emitting diodes, organic light-emitting transistors, and even electrically pumped organic lasers. In this context, an overview of these fantastic advancements in terms of the fundamental insights into developing high-performance organic semiconductors, efficient strategies for yielding desirable high-quality OSSCs, and their applications in optoelectronic devices and circuits is presented. Finally, an overview of the development of OSSCs along with current challenges and future research directions is provided.

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“…Atomic force microscope (AFM) image ( Supplementary Fig. 1) shows that p-MSB molecules are stacked layer-by-layer with a single-layer thickness of 1.75 nm and a plane parallel to the WSe 2 , 33 indicating the 2D epitaxial growth mode of p-MSB on the WSe 2 . The p-MSB-1 crystal has a thickness up to 130 nm after 15 min growth.…”

Section: Epitaxial Growth Of 2d Van-der-waals P-msb/wse 2 Interfacementioning

confidence: 99%

Large photoelectric-gating effect of two-dimensional van-der-Waals organic/tungsten diselenide heterointerface

et al. 2018

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Photo-or photoelectric-gating modulation is a promising strategy for high-performance photodetectors, which amplifies photoresponsivity by long-lived trapped charges at the interface. However, the performance is normally limited by the uncontrollable trapping process. Here, we develop a large photoelectric-gating, which enhances interfacial charge trapping process by a van-der-Waals interface with an electric-gating tunable energy barrier in the band alignment. By synergy of photo-gating and electric-gating effects, responsivity and detectivity of 1,4-bis(4-methylstyryl)benzene/tungsten diselenide (WSe 2) increase by 25-fold and 3-fold to 3.6 × 10 6 A/W and 8.6 × 10 14 Jones. High-quality two-dimensional van-der-Waals interface is of great importance. Sufficient supply of gas-phase molecules in physical vapor deposition is pivotal to obtain such interface between organic crystal and WSe 2. As an application, an electric-gating switchable photodetector has been developed, showing great potential of this strategy not only in high-performance photodetectors but also in new photoelectrical devices.

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High-Quality Large-Size Organic Crystals Prepared by Improved Physical Vapor Growth Technique and Their Optical Gain Properties

Cited by 29 publications

References 42 publications

Preparation and time-resolved fluorescence study of RGB organic crystals

Preparation and time-resolved fluorescence study of RGB organic crystals

Organic Semiconductor Single Crystals for Electronics and Photonics

Large photoelectric-gating effect of two-dimensional van-der-Waals organic/tungsten diselenide heterointerface

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