High bandwidth semipolar (20–21) micro-LED-based white light-emitting diodes utilizing perovskite quantum dots and organic emitters in color-conversion layers for visible light communication and solid-state lighting applications

Sadhu, Annada Sankar; Pai, Yi-Hua; Chen, Li Yin; Hsieh, Chung‐An; Lin, Huey-Wen; Kuo, Hao‐Chung

doi:10.1039/d3nr01086d

Cited by 3 publications

(1 citation statement)

References 34 publications

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“…This enables smaller wavelength shift, shorter recombination time, and higher modulation bandwidth. , Therefore, for the implementation of a high-bandwidth white-light VLC data link, it is preferable to utilize a semipolar blue μLED and a high-bandwidth emitter. In our previous study, we have successfully demonstrated high-bandwidth white-light WLEDs based on μLED, achieving satisfactory CCTs and CRIs . However, the data rate was not reported in that study.…”

Section: Introductionmentioning

confidence: 87%

High-Speed Visible Light Communication Using Phenothiazine/Dimesitylborane Derivatives as Color Conversion Materials in Semipolar Micro-LED-Based White-Light Systems

Sadhu,

Chen,

Pai

et al. 2024

ACS Photonics

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Visible light communication (VLC) has emerged as a cutting-edge high-speed communication technology, poised to meet the surging capacity demands of 6G networks. Micro-light-emitting diodes (μLEDs) are considered as the light sources for achieving high-speed VLC, distinguished by their remarkable modulation bandwidths. However, achieving broadband white light emission hinges on the utilization of color-conversion materials with wide emission spectra. The transmission speed of the white-light system is inherently constrained by the characteristics of these color-conversion materials. In this work, we demonstrate CC-MP7 and CC-MP8, two derivatives of phenothiazine/dimesitylborane, as color conversion materials in a semipolar (20−21) micro-LED-based white-light system for high-speed VLC. The color conversion layers possess wide emission spectra, enabling them to achieve excellent color rendering performance when combined with blue micro-LEDs. CC-MP7 and CC-MP8 demonstrate rapid photoluminescence decay characteristics, thereby enhancing the modulation bandwidth of the color-conversion layer in the white-light system. The resulting bandwidths achieved by CC-MP7 and CC-MP8 are 210 and 240 MHz, respectively, which represents an approximately 45-fold increase compared to ordinary phosphors. By combining semipolar (20−21) micro-LEDs with CC-MP7 and CC-MP8, the resulting white-light systems exhibit correlated color temperatures of 6860 and 7500 K, CIE coordinates of (0.3009, 0.3577) and (0.2958, 0.3129), and color-rendering indexes of 80 and 85, respectively. Furthermore, both systems offer high bandwidths of 1063 and 1084 MHz with the data rates of 1.72 Gbps and 1.74 Gbps using nonreturn-to-zero on−off keying (NRZ-OOK) format, respectively, indicating the significant potential of CC-MP7 and CC-MP8 for practical applications in VLC.

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Section: Introductionmentioning

confidence: 87%

High-Speed Visible Light Communication Using Phenothiazine/Dimesitylborane Derivatives as Color Conversion Materials in Semipolar Micro-LED-Based White-Light Systems

Sadhu,

Chen,

Pai

et al. 2024

ACS Photonics

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Highly Crystalized MAPbX₃ Perovskite Triangular Nanowire Arrays for Optoelectronic Applications

Xiong,

Xu,

Chen

et al. 2023

Advanced Materials

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Here, a facile fabrication approach for the high‐quality 1D perovskite triangular nanowire (TNW) array synthesis through space‐confined effect is reported. A soft stamp containing 1D triangular linear array pattern is used to confine the MAPbX3 solution and to guide the growth of the nanowires along the prescribed direction with good crystallinity. The further constructed photodetectors based on the obtained MAPbI3 TNWs exhibit superior photoresponse properties with a responsivity of (125.2 ± 2.5) A W−1 and detectivity of (2.8 ± 0.8) × 1013 Jones at the wavelength of 650 nm. This excellent performance is attributed to the highly crystalline TNW with optical anisotropy and a small asymptotic height, which reduces the probability of the photon reflection and promotes the carrier transport. More interestingly, the increased surface area of the triangular device can present superior flexibility after a couple of thousands of bending cycles. Furthermore, by fabricating 7 × 7 photodetector arrays, the potential image sensor application is demonstrated. The perovskite nanowire fabrication approach is scalable and compatible with current semiconductor manufacturing, which indicates their great potential in broad applications.

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Microfluidics-enabled intelligent manufacturing of metal halide perovskite nanocrystals

Tang,

Yang

2023

Biomicrofluidics

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Large-scale and controllable fabrication is an indispensable step for the industrialization and commercialization of halide perovskite nanocrystals, which are new-generation semiconductor materials for optoelectronic applications. Microfluidics, which provides continuous and precise synthesis, has been considered as a promising technique to fulfill this aspect. The research studies over the past decades have witnessed the advancement of microfluidics as a powerful tool in the fabrication of halide perovskite nanocrystals. In this Perspective, the state-of-the-art research based on microfluidics is introduced initially, including the synthesis of functional structures and materials, devices, as well as the interdisciplinary interactions between microfluidics and artificial intelligence and machine learning, etc. We then detail the issues and challenges in hindering progress in the above areas. Finally, we provide future directions and trends for the technology to achieve its full potential. This Perspective is expected to benefit the collective efforts between the field of nanomaterials and microfluidics in advanced manufacturing.

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High bandwidth semipolar (20–21) micro-LED-based white light-emitting diodes utilizing perovskite quantum dots and organic emitters in color-conversion layers for visible light communication and solid-state lighting applications

Abstract: We demonstrate semipolar (20-21) micro-LED-based high-bandwidth WLEDs utilizing pervoskite QDs and organic emitters in color conversion films. The WLEDs exhibit a bandwith in excess of 1 GHz and a CCT...

Cited by 3 publications

References 34 publications

High-Speed Visible Light Communication Using Phenothiazine/Dimesitylborane Derivatives as Color Conversion Materials in Semipolar Micro-LED-Based White-Light Systems

High-Speed Visible Light Communication Using Phenothiazine/Dimesitylborane Derivatives as Color Conversion Materials in Semipolar Micro-LED-Based White-Light Systems

Highly Crystalized MAPbX₃ Perovskite Triangular Nanowire Arrays for Optoelectronic Applications

Microfluidics-enabled intelligent manufacturing of metal halide perovskite nanocrystals

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High bandwidth semipolar (20–21) micro-LED-based white light-emitting diodes utilizing perovskite quantum dots and organic emitters in color-conversion layers for visible light communication and solid-state lighting applications

Abstract: We demonstrate semipolar (20-21) micro-LED-based high-bandwidth WLEDs utilizing pervoskite QDs and organic emitters in color conversion films. The WLEDs exhibit a bandwith in excess of 1 GHz and a CCT...

Cited by 3 publications

References 34 publications

High-Speed Visible Light Communication Using Phenothiazine/Dimesitylborane Derivatives as Color Conversion Materials in Semipolar Micro-LED-Based White-Light Systems

High-Speed Visible Light Communication Using Phenothiazine/Dimesitylborane Derivatives as Color Conversion Materials in Semipolar Micro-LED-Based White-Light Systems

Highly Crystalized MAPbX3 Perovskite Triangular Nanowire Arrays for Optoelectronic Applications

Microfluidics-enabled intelligent manufacturing of metal halide perovskite nanocrystals

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Highly Crystalized MAPbX₃ Perovskite Triangular Nanowire Arrays for Optoelectronic Applications