Highly Efficient Full‐Color Inorganic LEDs on a Single Wafer by Using Multiple Adhesive Bonding

Mun, Seung‐Hyun; Kang, Chang‐Mo; Min, Jung‐Hong; Choi, Soo-Young; Jeong, Woo‐Lim; Kim, Gi-Gwan; Kim, Kyung-Pil; Ko, Heung Cho; Lee, Dong-Seon

doi:10.1002/admi.202100300

Cited by 20 publications

(10 citation statements)

References 37 publications

(48 reference statements)

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“…In addition to vertical stacking, bonding integration also enables lateral configuration of RGB micro-LEDs. Dong-Seon Lee’s group [ 87 – 90 ] developed a method of adhesive bonding by SU-8. The optimized bonding process for full color is shown in Fig.…”

Section: Bonding Integration Of Micro-ledmentioning

confidence: 99%

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Integration Technology of Micro-LED for Next-Generation Display

Chen

Zeng

et al. 2023

Research

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Inorganic micro light-emitting diodes (micro-LEDs) based on III-V compound semiconductors have been widely studied for self-emissive displays. From chips to applications, integration technology plays an indispensable role in micro-LED displays. For example, large-scale display relies on the integration of discrete device dies to achieve extended micro-LED array, and full color display requires integration of red, green, and blue micro-LED units on the same substrate. Moreover, the integration with transistors or complementary metal-oxide-semiconductor circuits are necessary to control and drive the micro-LED display system. In this review article, we summarized the 3 main integration technologies for micro-LED displays, which are called transfer integration, bonding integration, and growth integration. An overview of the characteristics of these 3 integration technologies is presented, while various strategies and challenges of integrated micro-LED display system are discussed.

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Section: Bonding Integration Of Micro-ledmentioning

confidence: 99%

“…(E) EL spectra of the full-color LEDs in white color mode. (F) Commission Internationale de l'Eclairage (CIE) coordinates of the full-color LEDs for various color modes [ 90 ].…”

Section: Bonding Integration Of Micro-ledmentioning

confidence: 99%

Integration Technology of Micro-LED for Next-Generation Display

Chen

Zeng

et al. 2023

Research

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“…Artificial lighting has become ubiquitous and indispensable in modern society. Recently, there has been extensive research on color-tunable light-emitting diodes (LEDs) for applications in augmented and virtual reality displays, indoor lighting, and architectural lighting. − While organic LEDs offer numerous benefits compared to alternative lighting and display technologies, they are susceptible to water damage, exhibit a relatively high cost, and pose challenges in fabrication processes . On the other hand, quantum dot LEDs are extensively used owing to their notable characteristics, including excellent thermal and mechanical stability and tunable emission spectra .…”

Section: Introductionmentioning

confidence: 99%

Color-Tunable Light-Emitting Diodes Based on Rare Earth Doped Gallium Oxide Films

Guo

Saito

Tanaka

2023

ACS Appl. Electron. Mater.

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Color-tunable light-emitting diodes (LEDs) offer a broad spectrum of applications, encompassing augmented and virtual reality displays, indoor lighting, and architectural lighting. Achieving high efficiency and brightness, stable emission, and fullcolor emission is highly desirable in color-tunable LEDs. However, conventional mass transfer processes have made realizing this technology challenging, because they require extracting red, green, and blue LED chips from different epitaxial wafers. In this spotlight article, we review the progress made toward achieving color-tunable LEDs based on rare earth doped wide bandgap Ga 2 O 3 semiconductors. We have systematically studied the structural and optical characteristics of rare earth (Eu, Er, and Tm) doped Ga 2 O 3 films grown by pulsed laser deposition and observed strong emissions in the red, green, and blue spectral regions from Eu, Er, and Tm doped Ga 2 O 3 films, respectively. We have demonstrated the development of red, green, and blue LEDs based on these Eu, Er, and Tm doped Ga 2 O 3 films and achieved color-tunable LEDs using Eu, Er, and Tm codoped Ga 2 O 3 films. These results demonstrate the great potential of rare earth doped Ga 2 O 3 films for use in color-tunable LED applications.

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“…Lin et al proposed a straightforward and convenient WDM visible light communication (VLC) system . Research on color-tunable red–green–blue (RGB) light-emitting diodes (LEDs) has been a hot topic. − Jin et al designed vertically stacked RGB LEDs with a distributed Bragg reflector (DBR), achieving white light illumination with multiple color temperatures . Wang et al developed vertically stacked micro-LED arrays that can provide multiple colors and perform VLC .…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the total power consumption of the system is approximately 3. the channel space, cost, and power through the utilization of a single link but also triples the channel capacity simultaneously. 29 Jin et al 28 Shin et al 30 Chun et al VLC systems, which is of great significance for the future highspeed wireless communication and IoT. A single diode is 0.9 mm wide and 1 mm long.…”

Section: ■ Introductionmentioning

confidence: 99%

Multichannel Visible Light Communication over a Single Optical Path

Fu,

et al. 2023

ACS Photonics

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Multiple-quantum-well (MQW) diodes have a variety of light emission, transmission, modulation, and detection functions. In particular, they feature an emissiondetection spectral overlap region, allowing them to be used as both transmitters and receivers at the same time. Here, we vertically assemble red, green, and blue MQW diodes to create wavelength-division multiplexing (WDM) transmitters and receivers by using the distributed bragg reflector (DBR) technique. A single-link light communication system, in which longerwavelength photons can pass through the shorter-wavelength MQW diode transmitter/receiver pair to prevent crosstalk from occurring between the different optical signals, is established to achieve bidirectional data transmission over more than one channel. With the appropriate optical system in place, it is possible to accurately transmit optical data over a range of 25 m. The system experimentally demonstrates real-time multichannel communication of information, including video and audio signals, over a single optical path. These results show that the vertical integration of MQW diodes offers a promising way to create a WDM visible light communication system.

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Highly Efficient Full‐Color Inorganic LEDs on a Single Wafer by Using Multiple Adhesive Bonding

Cited by 20 publications

References 37 publications

Integration Technology of Micro-LED for Next-Generation Display

Integration Technology of Micro-LED for Next-Generation Display

Color-Tunable Light-Emitting Diodes Based on Rare Earth Doped Gallium Oxide Films

Multichannel Visible Light Communication over a Single Optical Path

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