Mass transfer for Micro-LED display: Transfer printing techniques

Linghu, Changhong; Zhang, Shun; Wang, Chengjun; Luo, Hongyu; Song, Jizhou

doi:10.1016/bs.semsem.2020.12.002

Cited by 19 publications

(13 citation statements)

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“…First, as shown in Figure 5D, the efficiency of LED decreases markedly, when LED was downsized due to the sidewall effect (Wong et al, 2018), especially for the red chips (Wong et al, 2020). Second, the mass transfer is challenging (Linghu et al, 2021). For example, approximately 6.2 million LED dies are needed for a display panel with a resolution of 1920 × 1,080.…”

Section: Led Matrix/arraymentioning

confidence: 99%

Progress of Backlight Devices: Emergence of Halide Perovskite Quantum Dots/Nanomaterials

Singh

Chen

Singh

et al. 2022

Front. Nanotechnol.

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The technology behind the display is becoming ever more prevalent in our daily lives. It has many applications, including smartphones, tablets, desktop monitors, TVs, and augmented reality/virtual reality devices. The display technology has progressed drastically over the past decade, from the bulky cathode ray tube to the flat panel displays. In the flat panel displays, the liquid crystal display (LCD) and organic light-emitting diodes (OLEDs) are the two dominant technologies. Nevertheless, due to low stability and color tunability, OLEDs remain behind the LCDs. The LCD screen has a backlight, usually a white LED, which comprises a blue LED covered with a red and green enhanced layer (color-converting layers). Although InP/CdSe QDs attracted more attention due to their solution processability and better color gamut than the previous technologies, the complexity of their synthesis was still an obstacle to their commercialization. Later, the emergence of perovskite with highly intense and tunable PL emission, high color purity, and low-cost synthesis route attracted the attention of display researchers. Owing to the relatively higher performance of perovskite quantum dots (PQDs) than that of bulk (3D) perovskite in backlit display devices, these PQDs are being used for high color contrast and bright display devices. Furthermore, the color gamut for PQDs was observed as 140% of the NTSC standard, that is, close to that of the commercial OLED devices. In this review, we have discussed the progress of display technologies with a clear classification of the pros and cons of each technology. Also, the application of perovskite QD/nanomaterials in LCD backlit devices has been discussed, and the future direction of further improvement in their stability and performance has been listed.

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Section: Led Matrix/arraymentioning

confidence: 99%

Progress of Backlight Devices: Emergence of Halide Perovskite Quantum Dots/Nanomaterials

Singh

Chen

Singh

et al. 2022

Front. Nanotechnol.

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“…Micro-LED displays have advantages over conventional liquid crystal displays (LCD) and organic light-emitting diodes (OLEDs) in terms of resolution, response speed, color saturation, lifespan, and power consumption. [5][6][7] More importantly, LCD and OLED production lines can only use substrates of specific sizes. As application scenarios change, different production lines need to be built to meet the production of different sizes of displays.…”

Section: Introductionmentioning

confidence: 99%

Highly effective transfer of micro-LED pixels to the intermediate and rigid substrate with weak and tunable adhesion by thiol modification

et al. 2023

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“…The low yield rate of the massiveproduction of micro-LED would result in extremely high cost. [1][2] Currently, the substrate of a flexible micro-LED display is mainly based on polyimide (PI) film due to the characteristics such as solvent-durability, thermal stability (<500℃), insulating properties, and high mechanical strength. However, a display based on PI substrate would be suffered from the high-cost of PI material and optical retardation.…”

Section: Introductionmentioning

confidence: 99%