Ultrahigh-resolution quantum dot patterning for advanced optoelectronic devices

Nam, Tae Won; Choi, Min‐Jae; Jung, Yeon Sik

doi:10.1039/d2cc05874j

Cited by 6 publications

(4 citation statements)

References 93 publications

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“…To maintain emission during the switching process, one storage capacitor (C s ) is located between the gate and source electrode of the driving TFT and stores the gate signal, V gate . The luminance of the QLED is directly linked to the current flow of the driving TFT (I TFT ), which is determined by the difference between the gate-to-source voltage (V GS = V gate − V source ) and the threshold voltage (V T ) described by the equation, I TFT ∝ (V GS − V T ) 2 . Therefore, the luminance of the QLED can easily fluctuate owing to variations in the gate-to-source voltage of the driving TFT.…”

Section: Active Matrix Qled Displaymentioning

confidence: 99%

“…As discussed, matter can be confined to 1, 2, or 3Ds, which correspond to quantum wells, quantum wires, and QDs, respectively. In accordance with Heisenberg's uncertainty principle, the ΔE conf follows Equations ( 1) and (2), where Δp x , m, ℏ, Δx, k b , T, and 𝜆 D denote uncertainty of momentum, mass, reduced Planck's constant, uncertainty of position, Boltzmann constant, absolute temperature in Kelvin, and de Broglie wavelength, respectively.…”

Section: Basic Principles Of Qd Optoelectronicsmentioning

confidence: 99%

“…Over the past decades, colloidal quantum dot (QD) has become one of the most attractive technologies in optoelectronics, [1,2] such as photovoltaics, [3] photodetectors, [4] lasers, [5] lightings, [6,7] and primarily displays. [8,9] QDs are nanometer-sized spherical semiconductor clusters in which the quantum confinement regime specifies the wave function of the electrons and holes.…”

Section: Introductionmentioning

confidence: 99%

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Recent Advances and Challenges of Colloidal Quantum Dot Light‐Emitting Diodes for Display Applications

et al. 2023

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Colloidal quantum dots (QDs) exhibit tremendous potential in display technologies owing to their unique optical properties, such as size‐tunable emission wavelength, narrow spectral linewidth, and near‐unity photoluminescence quantum yield. Significant efforts in academia and industry have achieved dramatic improvements in the performance of quantum dot light‐emitting diodes (QLEDs) over the past decade, primarily owing to the development of high‐quality QDs and optimized device architectures. Moreover, sophisticated patterning processes have also been developed for QDs, which is an essential technique for their commercialization. As a result of these achievements, some QD‐based display technologies, such as QD enhancement films and QD‐organic light‐emitting diodes, have been successfully commercialized, confirming the superiority of QDs in display technologies. However, despite these developments, the commercialization of QLEDs is yet to reach a threshold, requiring a leap forward in addressing challenges and related problems. Thus, representative research trends, progress, and challenges of QLEDs in the categories of material synthesis, device engineering, and fabrication method to specify the current status and development direction are reviewed. Furthermore, brief insights into the factors to be considered when conducting research on single‐device QLEDs are provided to realize active matrix displays. This review guides the way toward the commercialization of QLEDs.

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Section: Active Matrix Qled Displaymentioning

confidence: 99%

Section: Basic Principles Of Qd Optoelectronicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Recent Advances and Challenges of Colloidal Quantum Dot Light‐Emitting Diodes for Display Applications

et al. 2023

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“…[27][28][29][30][31][32] The optical patterning technology, represented by conventional lithography, has become one of the optimal choices for fabricating such display devices due to its mature process flow and extremely high processing precision. [33][34][35] Currently, there are three types of optical patterning techniques used to prepare fine QD patterns. The longest developed is conventional lithography, whose process is shown in Figure 2a.…”

Section: Introductionmentioning

confidence: 99%

Direct Photolithography Patterning of Quantum Dot‐Polymer

Guo,

Chen,

et al. 2023

Adv Funct Materials

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For the new display technology based on quantum dots (QDs), achieving high‐precision red, green, and blue pixel arrays has always been a research focus in the pursuit of high‐quality and vivid image displays. However, problems such as material stability and process environment make it difficult to guarantee the quality of high‐precision patterns. The new optical patterning technology represented by direct photolithography is considered a highly promising method for achieving ultrafine patterns at the submicron level. This process prepares patterned quantum dot‐polymer films through light‐induced chemical changes. This paper reviews the progress of direct photolithography research focused on QD‐polymer materials and presents recent advances in such processes for monochromatic/multicolor light patterning. The article classifies QD‐polymers into three categories by combining QDs with polymers in different ways, including polymer‐coated QDs, polymers as QD ligands, and polymers as photocrosslinkers for QDs. Their synthesis schemes, functional features, and challenges are also presented. In addition, a scheme to remove the photomask during direct lithography using lasers and light field modulation is also proposed. It aims to provide readers and researchers with some generalized research information and improvement ideas. This can further advance the development of direct photolithography for QD‐polymers.

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