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oe1(光电查) - 科学论文

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出版时间
  • 2019
研究主题
  • solution deposition
  • printable electronic transport layer
  • multilayer OLEDs
  • fully inkjet printed
应用领域
  • Optoelectronic Information Science and Engineering
机构单位
  • Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
  • Peking University
75 条数据
?? 中文（中国） ▾

  • A Low Loss Quantum-dot-doped Optical Fiber Temperature Sensor Based on Flexible Print Technology

    摘要： A quantum dots optical fiber (QDOF) sensor is proposed for temperature sensing in this paper. The sensor is fabricated by the drop-on-demand inkjet printing technology. By controlling the diameter of droplet, the spacing between droplets and the number of printed layers, the QDOF is printed on the polymer substrate. The loss of QDOF is less than 0.35dB·mm-1 at the fluorescence wavelength. The experimental results show that the temperature sensitivity of sensor is 109pm/℃. As far as we know, this is the first time that a QDOF sensor is manufactured by the inkjet printing technology to realize the temperature measurement.

    关键词： inkjet printing,quantum dots fiber,temperature sensor

    更新于2025-09-16 10:30:52

  • POLED displays: Robust printing of pixels

    摘要： The fabrication of a high-quality polymeric organic light emitting diode display requires the deposition of identical, uniform ?uid ?lms into a large number of shallow recessed regions that form a regular array of pixels on a display backplane. We determine the protocols required to achieve continuous liquid coverage of the entire pixel area for the case where equally spaced ?uid droplets are sequentially printed along a straight line within a stadium-shaped pixel and explore how these protocols depend on the wetting properties of the pixel surface. Our investigation uses a combination of experiments and numerical modeling, based on the assumption of ?uid redistribution via capillary spreading according to a Cox-Voinov law. We show that the model is able to predict quantitatively the evolution of the liquid deposited in a pixel and provides a computationally inexpensive design tool to determine ef?cient printing strategies that account for uncertainties arising from imperfect substrate preparation or printhead dysfunction.

    关键词： pixel fabrication,POLED displays,inkjet printing,capillary spreading,Cox-Voinov law

    更新于2025-09-12 10:27:22

  • [IEEE 2019 IEEE 2nd International Conference on Electronics Technology (ICET) - Chengdu, China (2019.5.10-2019.5.13)] 2019 IEEE 2nd International Conference on Electronics Technology (ICET) - Efficient Top-emitting Quantum Dot Light Emitting Diodes via Inkjet Printing

    摘要： In this work, we report inkjet-printed top-emitting (TE) quantum dot light emitting diodes (QLEDs) for achieving high-resolution QLED displays. At the luminance of 1000 cd/m2, the TE devices exhibit a current efficiency of 5.90 cd/A which is 2.7-fold higher than 2.18 cd/A of the conventional bottom-emitting (BE) devices. The significant enhancement is owing to the well-controlled cavity length which is easy for inkjet printing.

    关键词： QLEDs,top-emitting structures,inkjet printing,coffee ring,Quantum dot

    更新于2025-09-12 10:27:22

  • Exploiting supramolecular assemblies for filterless ultra-narrowband organic photodetectors with inkjet fabrication capability

    摘要： Narrowband photodetectors are useful for a myriad of applications involving color discrimination as well as biological imaging and machine vision. Prevalent devices use broadband light absorbing materials in conjunction with electric (charge collection narrowing, photo multiplication) and optical strategies (optical cavity) to narrow down the spectral response of the detector. Here we exploit the intrinsic narrow absorption width of B13–50 nm peculiar to J-aggregates of strongly coupled cyanine dye molecules for narrowband photodetectors. Albeit using ultrathin J-aggregate films (10 nm) unparalleled optical aggregate properties lead to high external quantum efficiency (15%) and response speed (15 kHz) at low bias voltage ((cid:2)1 V). We show that the self-assembly process and device architecture used permit the incorporation of J-aggregates of various cyanine dyes with photodetection maxima ranging from the visible to the near-infrared region up to 1000 nm. Narrow bandwidth (o50 nm) photodetectors fabricated by inkjet printing the active device layers including the J-aggregate film perform on par with spin-coated devices, thus underlining their industrial potential.

    关键词： J-aggregates,organic photodetectors,cyanine dyes,narrowband photodetectors,inkjet printing

    更新于2025-09-12 10:27:22

  • Inkjet‐Printed Micrometer‐Thick Patterned Perovskite Quantum Dot Films for Efficient Blue‐to‐Green Photoconversion

    摘要： Perovskite materials have attracted great attention as a potential color conversion material in the display field recently. However, preparing a large and thick patterned film remains to be a key challenge. Here, a patterned CsPbBr3 quantum dot color conversion layer is prepared using the inkjet-printing and UV-curing method. The prepared 6 μm film exhibits a uniform morphology without coffee-ring effect. Green emission is achieved with a brightness of 58 cd m?2 and narrow emission band is achieved using the 345 cd m?2 blue OLED excitation light. Furthermore, only 1.4% of decay in brightness is observed after the film is exposed to ambient environment for 1 month without any protection. Finally, a 6.6 in. active matrix perovskite quantum dot display prototype is demonstrated using the blue OLED backlight with 384 × 300 resolution for the first time.

    关键词： color conversion,displays,inkjet printing,perovskite quantum dots

    更新于2025-09-12 10:27:22

  • [IEEE 2019 IEEE 2nd International Conference on Electronics Technology (ICET) - Chengdu, China (2019.5.10-2019.5.13)] 2019 IEEE 2nd International Conference on Electronics Technology (ICET) - High Efficiency Fully Inkjet Printed Multilayer OLEDs Using A Printable Organic Electronic Transport Layer

    摘要： High efficiency fully inkjet printed multilayer OLEDs have been successfully developed using a printable organic electronic transport layer (ETL). Through a proper selection of solvents, we prepared a jettable and stable ETL ink with commercially soluble electronic transport material. The fully inkjet printed multilayer green phosphorescent OLEDs showed a high luminous efficiency of 55.5 cd A-1 at a brightness of 1000 cd m-2 with an external quantum efficiency (EQE) of 14.8%. The results demonstrated that the solution deposition of inkjet printed ETL caused little damage to the underlying emission layer (EML).

    关键词： solution deposition,printable electronic transport layer,multilayer OLEDs,fully inkjet printed

    更新于2025-09-12 10:27:22

  • Solution-Processed Oxide Complementary Inverter via Laser Annealing and Inkjet Printing

    摘要： Metal–oxide–semiconductors (MOS) have become an ideal candidate for the next-generation optoelectronic device applications. However, high processing temperature and complicate processes are still tremendous challenge in developing solution-based complementary MOS (CMOS) inverter. In this article, for the first time, femtosecond (fs) laser was used to realize controllable annealing for solution-based CMOS inverter. The achievement of nonstoichiometric p-type oxide thin films was ascribed to the photo-assisted conversion of precursor to metal–oxide (M–O) lattices along with the formation of atom vacancies in oxide lattice due to carrier excitation and relaxation using laser annealing (LA). The field effect mobility of the p- and n-type M–O thin-film transistors (TFTs) with inkjet printing (IJP) and LA was 0.91 and 7.07 cm2/V·s, respectively. Moreover, location control capacity was exploited to separately anneal the p- and n-type oxide deposited with IJP for the fabrication of TFTs, which significantly simplified the fabrication process of the inverter. CMOS inverter with high noise margin and moderate voltage gain above 10 was also obtained. Our work significantly improved the ability to selectively manipulate the functionality and properties of the irradiated materials. The results demonstrated that logic gates based on all-oxide can be large area integrated using our strategy, exhibiting attractive properties and applications of the CMOS integrated circuits in oxide electronics.

    关键词： p-type oxide semiconductor,inkjet printing (IJP),Complementary inverter,femtosecond (fs) laser annealing (LA),thin-film transistors (TFTs)

    更新于2025-09-12 10:27:22

  • Inkjet‐Printed Micrometer‐Thick Perovskite Solar Cells with Large Columnar Grains

    摘要： Transferring the high power conversion efficiencies (PCEs) of spin-coated perovskite solar cells (PSCs) on the laboratory scale to large-area photovoltaic modules requires a significant advance in scalable fabrication methods. Digital inkjet printing promises scalable, material, and cost-efficient deposition of perovskite thin films on a wide range of substrates and in arbitrary shapes. In this work, high-quality inkjet-printed triple-cation (methylammonium, formamidinium, and cesium) perovskite layers with exceptional thicknesses of >1 μm are demonstrated, enabling unprecedentedly high PCEs > 21% and stabilized power output efficiencies > 18% for inkjet-printed PSCs. In-depth characterization shows that the thick inkjet-printed perovskite thin films deposited using the process developed herein exhibit a columnar crystal structure, free of horizontal grain boundaries, which extend over the entire thickness. A thin film thickness of around 1.5 μm is determined as optimal for PSC for this process. Up to this layer thickness X-ray photoemission spectroscopy analysis confirms the expected stoichiometric perovskite composition at the surface and shows strong deviations and inhomogeneities for thicker thin films. The micrometer-thick perovskite thin films exhibit remarkably long charge carrier lifetimes, highlighting their excellent optoelectronic characteristics. They are particularly promising for next-generation inkjet-printed perovskite solar cells, photodetectors, and X-ray detectors.

    关键词： perovskite solar cells,high diffusion lengths,inkjet printing,large columnar crystal grains

    更新于2025-09-12 10:27:22

  • Oblique Electrostatic Inkjet-Deposited TiO2 Electron Transport Layers for Efficient Planar Perovskite Solar Cells

    摘要： In this study, a new, simple, and novel oblique electrostatic inkjet (OEI) technique is developed to deposit a titanium oxide (TiO2) compact layer (CL) on fluorine-doped tin oxide (FTO) substrate without the need for a vacuum environment for the first time. The TiO2 is used as electron transport layers (ETL) in planar perovskite solar cells (PSCs). This bottom-up OEI technique enables the control of the surface morphology and thickness of the tio2 cL by simply manipulating the coating time. the oei-fabricated tio2 is characterized tested and the results are compared with that of tio2 cLs produced by spin-coating and spray pyrolysis. the oei-deposited tio2 cL exhibits satisfactory surface coverage and smooth morphology, conducive for the ETLs in PSCs. The power-conversion efficiencies of PSCs with oei-deposited tio2 CL as the ETL were as high as 13.19%. Therefore, the present study provides an important advance in the effort to develop simple, low-cost, and easily scaled-up techniques. OEI may be a new candidate for depositing tio2 CL ETLs for highly efficient planar PSCs, thus potentially contributing to future mass production.

    关键词： electron transport layers,oblique electrostatic inkjet,power-conversion efficiencies,planar perovskite solar cells,TiO2

    更新于2025-09-12 10:27:22

  • Stable Colloidal Quantum Dot Inks Enable Inkjet-Printed High-Sensitivity Infrared Photodetectors

    摘要： Colloidal Quantum Dots (CQDs) have recently gained attention as materials for manufacturing optoelectronic devices in view of their tunable light absorption and emission properties and compatibility with low-temperature thin-film manufacture. The realization of CQD inkjet-printed infrared photodetectors has thus far been hindered by incompatibility between the chemical processes that produce state-of-art CQD solution-exchanged inks; and the requirements of ink formulations for inkjet materials processing. To achieve inkjet-printed CQD solids with a high degree of reproducibility, as well as with the needed morphological and optoelectronic characteristics, we sought to overcome the mismatch among these processing conditions. In this study, we design CQD inks by simultaneous evaluation of requirements regarding ink colloidal stability, jetting conditions and film morphology for different dots and solvents. The new inks remain colloidally stable, achieved through a design that suppresses the reductant properties of amines on the dots’ surface. After drop ejection from the nozzle, the quantum dot material is immobilized on the substrate surface due to the rapid evaporation of the low boiling point amine-based compound. Concurrently, the high boiling point solvent allows for the formation of a thin film of high uniformity, as is required for the fabrication of high-performance IR photodetectors. We fabricate inkjet-printed photodetectors exhibiting the highest specific detectivities reported to date (above 1012 Jones across the IR) in an inkjet-printed quantum dot film. As a patternable CMOS-compatible process, the work offers routes to integrated sensing devices and systems.

    关键词： CQD,infrared,printing,ink-jet,inkjet,colloidal quantum dots,photodetectors

    更新于2025-09-12 10:27:22