- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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Micro Grating Deposition on Non-Planar Surfaces by Polymer-Assisted Transfer Printing
摘要： By spin-coating a few hundred of nanometer thick poly(methyl methacrylate) (PMMA) film on a micron or a sub-micron scale structure, the structure can be transferred on an arbitrary substrate. More precisely, by using a thin PMMA support layer and releasing the structure from the transient substrate into water, the PMMA with the structure can be collected on a desired substrate. Here, this technique is demonstrated to be suitable for transferring metallic binary grating and few-layer Bragg gratings from flat substrates onto 3D-printed convex lenses. Moreover, the thin PMMA film is sufficiently strong to support centimeter size free-standing areas. This enables fabrication of 1.5 μm thick, free-standing structure of a Bragg-grating with PMMA. Thus, the presented technique provides a powerful tool for transfer printing of micron scale structures.
关键词： transfer printing,non-planar surfaces,free-standing structures,microstructure transfer
更新于2025-09-23 15:23:52
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Growth, transfer printing and colour conversion techniques towards full-colour micro-LED display
摘要： Micro light-emitting diode (micro-LED) display, mainly based on inorganic GaN-based LED, is an emerging technique with high contrast, low power consumption, long lifetime and fast response time compared to liquid crystal display (LCD) and organic light-emitting diode (OLED) display. Therefore, many research institutes and companies have conducted in-depth research on micro-LED in the full-colour display, gradually realizing the commercialization of micro-LED. And the current research results of micro-LED indicate that it can be widely used in display, visible light communication (VLC), biomedicine and other fields. Although micro-LED has broad commercial prospects, it still faces great challenges, such as the effect of size reduction on performance, the realization of high-density integration on a single wafer for independent addressing of full-colour micro-LED display, the improvement of repair technique and yield, et al. This paper reviews the key solutions to the technical difficulties of the full-colour micro-LED display. Specifically, this review analyzes and discusses a variety of advanced full-colour micro-LED display techniques with a focus on three aspects: growth technique, transfer printing technique and colour conversion technique. This review demonstrates the opportunities, progress and challenges of these techniques, aiming to guide the development of full-colour micro-LED display.
关键词： full-colour,growth,transfer printing,Micro-LED display,colour conversion
更新于2025-09-23 15:19:57
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24.3: <i>Invited Paper:</i> Printed Electrodes for All‐Solution‐Processed Inverted‐Structure OLEDs
摘要： A key enabling technology for all-printed organic light-emitting diodes is printing electrodes that can be used for anodes or cathodes for conventional or inverted device structures. In both device structures, the first bottom electrodes, which are either transparent or opaque depending on the device structure, are typically printed while the last top electrodes have been deposited by using a vacuum-based evaporation process because when the last top electrodes are fabricated by using a solution-based process, under organic layers are easily damaged during the fabrication process. Although so-called transfer printing process has been often reported for organic devices such as organic solar cells, it has been rarely applied for OLEDs. In addition, no fine patterning has been adopted in such printing processes. As part of our efforts towards all-printed OLEDs, inkjet-printed and/or transfer-printed, finely-patterned PEDOT:PSS electrodes have been investigated in our lab and most recent achievement will be reported in detail. In order to implement all-solution-processed OLEDs, we also studied the inverted-structure OLEDs, which showed comparable results to the conventional structure OLEDs with the vacuum-based deposited electrodes.
关键词： inverted structure,Organic light-emitting diode,OLED,PLED,inkjet-printing,transfer-printing,polymer light-emitting diode
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Chicago, IL, USA (2019.6.16-2019.6.21)] 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - A micro-concentrator photovoltaic module incorporating a bifacial silicon solar cell for direct and diffuse light capture
摘要： In this paper, we report findings from a micro CPV module, employing 170 μm GaAs-based 2J CPV cells, assembled on glass substrates using micro-transfer printing. The CPV array uses all-glass lens arrays to focus the light with a geometric concentration ratio of 740 suns, and a bifacial, mono-crystalline silicon solar cell behind the substrate to capture the diffuse component of the light. We found that the diffuse capture creates a significant performance boost over CPV alone, and study the role of bifacial capture on the overall performance. The highest combined efficiency with respect to global normal irradiance was 25.4% for the module, measured by outdoor testing in Washington, DC.
关键词： Transfer printing,Photovoltaic cells,Gallium arsenide
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE 16th International Conference on Group IV Photonics (GFP) - Singapore, Singapore (2019.8.28-2019.8.30)] 2019 IEEE 16th International Conference on Group IV Photonics (GFP) - Micro-Transfer-Printed III-V-on-Silicon C-Band Distributed Bragg Reflector Laser
摘要： We demonstrate a micro-transfer-printed III-V-on-silicon distributed Bragg re?ector (DBR) laser using pre-processed III-V semiconductor optical ampli?ers (SOAs). A waveguide-coupled output power of 6 mW is obtained at 1565 nm.
关键词： lasers,III-V-on-silicon heterogeneous integration,micro-transfer-printing
更新于2025-09-16 10:30:52
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<i>In situ</i> wavelength tuning of quantum-dot single-photon sources integrated on a CMOS-processed silicon waveguide
摘要： Silicon quantum photonics provides a promising pathway to realize large-scale quantum photonic integrated circuits (QPICs) by exploiting the power of complementary-metal-oxide-semiconductor (CMOS) technology. Toward scalable operation of such silicon-based QPICs, a straightforward approach is to integrate deterministic single-photon sources (SPSs). To this end, hybrid integration of deterministic solid-state SPSs, such as those based on InAs/GaAs quantum dots (QDs), is highly promising. However, the spectral and spatial randomness inherent in the QDs poses a serious challenge for scalable implementation of multiple identical SPSs on a silicon CMOS chip. To overcome this challenge, we have been investigating a hybrid integration technique called transfer printing, which is based on a pick-and-place operation and allows for the integration of the desired QD SPSs on any locations on the silicon CMOS chips at will. Nevertheless, even in this scenario, in situ fine tuning for perfect wavelength matching among the integrated QD SPSs will be required for interfering photons from dissimilar sources. Here, we demonstrate in situ wavelength tuning of QD SPSs integrated on a CMOS silicon chip. To thermally tune the emission wavelengths of the integrated QDs, we augmented the QD SPSs with optically driven heating pads. The integration of all the necessary elements was performed using transfer printing, which largely simplified the fabrication of the three-dimensional stack of micro/nanophotonic structures. We further demonstrate in situ wavelength matching between two dissimilar QD sources integrated on the same silicon chip. Our transfer-printing-based approach will open the possibility for realizing large-scale QPICs that leverage CMOS technology.
关键词： wavelength tuning,transfer printing,quantum photonics,single-photon sources,silicon CMOS,quantum dots
更新于2025-09-16 10:30:52
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III-V-on-Si photonic integrated circuits realized using micro-transfer-printing
摘要： Silicon photonics (SiPh) enables compact photonic integrated circuits (PICs), showing superior performance for a wide variety of applications. Various optical functions have been demonstrated on this platform that allows for complex and powerful PICs. Nevertheless, laser source integration technologies are not yet as mature, hampering the further cost reduction of the eventual Si photonic systems-on-chip and impeding the expansion of this platform to a broader range of applications. Here, we discuss a promising technology, micro-transfer-printing (μTP), for the realization of III-V-on-Si PICs. By employing a polydimethylsiloxane elastomeric stamp, the integration of III-V devices can be realized in a massively parallel manner on a wafer without substantial modifications to the SiPh process flow, leading to a significant cost reduction of the resulting III-V-on-Si PICs. This paper summarizes some of the recent developments in the use of μTP technology for realizing the integration of III-V photodiodes and lasers on Si PICs.
关键词： micro-transfer-printing,Silicon photonics,III-V-on-Si,photonic integrated circuits,laser integration
更新于2025-09-12 10:27:22
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Exploring chemical interaction between Diiodooctane and PEDOT-PSS electrode for metal electrode-free non-fullerene organic solar cells
摘要： Metal electrode-free organic solar cells with printable top electrode are attractive to realize the low cost of photovoltaics. Interaction between the printable electrode and active layer is critical to the device performance. In this work, we report on chemical interaction between printable polymer electrode poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) and typically used additive of 1,8-Dioodooctane (DIO) in active layer. DIO can be converted to HI under the acidic condition of PEDOT:PSS, and the HI chemically reduces the PEDOT:PSS with the appearance of absorbance band at 800-1100 nm. The generation of I2 is verified by the color change of starch. The reaction results in decrease of its work function that hinders the efficient hole collection. A strategy is proposed to circumvent the detrimental interaction by inserting an ultrathin (15 nm) active layer without DIO between the initial active layer and PEDOT:PSS electrode. A power conversion efficiency (PCE) of 10.1% is achieved for the metal electrode-free non-fullerene organic solar cells.
关键词： PEDOT:PSS,1,8-Diiodooctane,chemical interaction,water transfer printing,organic solar cell,non-fullerene
更新于2025-09-12 10:27:22
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AIP Conference Proceedings [AIP Publishing INTERNATIONAL SYMPOSIUM ON GREEN AND SUSTAINABLE TECHNOLOGY (ISGST2019) - Perak, Malaysia (23–26 April 2019)] INTERNATIONAL SYMPOSIUM ON GREEN AND SUSTAINABLE TECHNOLOGY (ISGST2019) - Metallization contributions, requirements, and effects related to pattern transfer printing (PTP?) on crystalline silicon solar cells
摘要： In this work, the metallization requirements and development for an alternative fine line printing method to screen printing, called pattern transfer printing (PTP?), are discussed. This technique has been proven in high volume environments and shows impressive capability of printing lines down to 20μm consistently and reliably. With such a major reduction (nearly 50%) in contact area and paste volume, there are some critical aspects of the metallization paste that must be addressed. After these modifications have been made, an efficiency gain of 0.14%abs is demonstrated for the PTP? process versus that of a state-of-the-art screen-printed paste on an industrial scale under otherwise identical conditions.
关键词： PTP?,metallization,crystalline silicon solar cells,pattern transfer printing,efficiency gain
更新于2025-09-12 10:27:22
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[IEEE 2019 IEEE 16th International Conference on Group IV Photonics (GFP) - Singapore, Singapore (2019.8.28-2019.8.30)] 2019 IEEE 16th International Conference on Group IV Photonics (GFP) - Micro-Transfer-Printed III-V-on-Silicon C-Band Distributed Bragg Reflector Laser
摘要： We demonstrate a micro-transfer-printed III-V-on-silicon distributed Bragg re?ector (DBR) laser using pre-processed III-V semiconductor optical ampli?ers (SOAs). A waveguide-coupled output power of 6 mW is obtained at 1565 nm.
关键词： micro-transfer-printing,lasers,III-V-on-silicon heterogeneous integration
更新于2025-09-12 10:27:22