Controlled Bi-Axial Buckling and Postbuckling of Thin Films Suspended on a Stretchable Substrate with Square Prism Relief Structures

Zhang, Xiaoyang; Yu, Qingmin; Wu, Huaping; Cheng, Huanyu

doi:10.1142/s1758825121501234

Cited by 4 publications

(1 citation statement)

References 60 publications

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“…Therefore, flexible electronic systems have attracted a large amount of research and commercialization attentions [1][2][3][4][5][6][7]. Recent years, various approaches have been proposed to develop flexible electronic and optoelectronic systems, including rigid-flexible hybrid (attaching micro-size rigid IC on flexible substrate) [8] and all-flexible configurations [9,10]. The all-flexible configuration is usually expected to be the ideal form of flexible electronics, which employs flexible functional materials to fabricate devices on flexible substrate directly.…”

Section: Introductionmentioning

confidence: 99%

Strain insensitive flexible photodetector based on molybdenum ditelluride/molybdenum disulfide heterostructure

Zhu

Liang

et al. 2023

Nanotechnology

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Flexible electronic and optoelectronic devices are highly desirable for various emerging applications, such as human-computer interfaces, wearable medical electronics, flexible display, etc. Layered two-dimensional (2D) material is one of the most promising types of materials to develop flexible devices due to its atomically thin thickness, which gives it excellent flexibility and mechanical endurance. However, the 2D material devices fabricated on flexible substrate inevitably suffer from mechanical deformation, which can severely affect device performances, resulting in function degradation and even failure. In this work, we propose a strain insensitive flexible photodetector based on MoS2/MoTe2 heterostructure on polyimide substrate, which provides a feasible approach to cancel unpredicted impacts of strain on the device performances. Specifically, the MoS2/MoTe2 heterostructure is deposited with 4 electrodes to form three independent devices of MoS2 FET, MoTe2 FET and MoS2/MoTe2 heterojunction. Among them, the MoS2/MoTe2 heterojunction is used as the photodetector, while the MoS2 FET is used as a strain gauge to calibrate the photo detection result. Such configuration is enabled by the Schottky barrier formed between the electrodes and the MoS2 flake, which leads to obvious and negligible photo response of MoS2/MoTe2 heterojunction and MoS2 FET, respectively, under low source-drain bias (ex. 10 mV). The experimental results show that the proposed mechanism can not only calibrate the photo response to cancel strain effect, but also successfully differentiate the wavelength (with fixed power) or power (with fixed wavelength) of light illumination.

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Section: Introductionmentioning

confidence: 99%

Strain insensitive flexible photodetector based on molybdenum ditelluride/molybdenum disulfide heterostructure

Zhu

Liang

et al. 2023

Nanotechnology

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Highly reliable and stretchable OLEDs based on facile patterning method: toward stretchable organic optoelectronic devices

Nam,

Chang,

Kim

et al. 2024

npj Flex Electron

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Stretchable displays attract significant attention because of their potential applications in wearable electronics, smart textiles, and human-conformable devices. This paper introduces an electrically stable, mechanically ultra-robust, and water-resistant stretchable OLED display (SOLED) mounted on a stress-relief pillar platform. The SOLED is fabricated on a thin, transparent polyethylene terephthalate (PET) film using conventional vacuum evaporation, organic-inorganic hybrid thin film encapsulation (TFE), and a nonselective laser patterning process. This simple and efficient process yields an OLED display with exceptional stretchability, reaching up to 95% strain and outstanding durability, enduring 100,000 stretch-release cycles at 50% strain. Operational lifetime and water-resistant storage lifetime measurements confirm that the TFE provides effective protection even after the nonselective laser patterning process. A 3 × 3 array SOLED display module mounted on a stress-relief pillar platform is successfully implemented, marking the first case of water-resistant display array operation in the field of SOLEDs. This work aims to develop practical stretchable displays by offering a reliable fabrication method and device design for creating mechanically robust and adaptable displays, potentially paving the way for future advances in human-conformable electronics and other innovative applications.

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Manufacturing of stretchable substrate with biaxial strain control for highly-efficient stretchable solar cells and displays

Kwak,

Jeong,

Kwon

et al. 2023

Sci Rep

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There has been significant research focused on the development of stretchable materials that can provide a large area with minimal material usage for use in solar cells and displays. However, most materials exhibit perpendicular shrinkage when stretched, which is particularly problematic for polymer-based substrates commonly used in stretchable devices. To address this issue, biaxial strain-controlled substrates have been proposed as a solution to increase device efficiency and conserve material resources. In this study, we present the design and fabrication of a biaxial strain-controlled substrate with a re-entrant honeycomb structure and a negative Poisson’s ratio. Using a precisely machined mold with a shape error of less than 0.15%, we successfully fabricated polydimethylsiloxane substrates with a 500 μm thick re-entrant honeycomb structure, resulting in a 19.1% reduction in perpendicular shrinkage. This improvement translates to a potential increase in device efficiency by 9.44% and an 8.60% reduction in material usage for substrate fabrication. We demonstrate that this design and manufacturing method can be applied to the fabrication of efficient stretchable devices, such as solar cells and displays.

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Controlled Bi-Axial Buckling and Postbuckling of Thin Films Suspended on a Stretchable Substrate with Square Prism Relief Structures

Cited by 4 publications

References 60 publications

Strain insensitive flexible photodetector based on molybdenum ditelluride/molybdenum disulfide heterostructure

Strain insensitive flexible photodetector based on molybdenum ditelluride/molybdenum disulfide heterostructure

Highly reliable and stretchable OLEDs based on facile patterning method: toward stretchable organic optoelectronic devices

Manufacturing of stretchable substrate with biaxial strain control for highly-efficient stretchable solar cells and displays

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