Materials Literature
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With the development of our society, people need electronic devices more and more frequently. Stretchable sensors have been widely applied to biological fields due to their unique capacity to integrate with soft materials and curvilinear surfaces. Because of the increasing demand for flexible electronic equipment, peo…
Vapor condensation is a process of phase-change which has been widely used in energy-intensive industrial applications including power generation, water harvesting and thermal management of electronics. For lots of electronic systems, heat pipes which are defined as a kind of passive cooling device with a two-phase fl…
Entropy generation is a kind of available energy loss. Evolution of the thermodynamic entropy during accelerated test of die attach in LED is studied with transient analysis. The existing models on the study of heat transfer in the solder layer, mainly including the effect of voids on the mechanical properties and the…
The presence of chlorine ions can accelerate the degradation of Au-Al wire bonds. The chlorine-containing particles and the city water used for cleaning inside the packaging line are the possible sources of chlorine ions. It is speculated that the water carrying chlorine ions intruded into the encapsulated devices and…
Silicon nanowires (SiNWs) are widely used in many fields because of their excellent properties. Nowadays, the method to prepare SiNWs by metal-assisted chemical etching has gained extensive attentions. In this work, the organic solvent ethylene glycol is added into the etching solution to fabricate SiNWs with differen…
The needle structure plays a key role in the new low-temperature bonding technology. A electrodeposition route was used to directly obtain large copper needles up to the micron size. The copper needle was hexagonal pyramid with (111) preferred orientation. In order to regulate the size and density of copper needles, t…
Compared with other mechanical energy collectors, triboelectric nanogenerators have the advantages of large output, high efficiency and good stability. However, they can produce stretching, twisting, bending in the process of collecting mechanical energy generated by human motion. Maintaining good stability under defo…
With the development of electronic packaging technology, lead-free solders have been widely utilized in electronic devices in recent years. For this research, through the electrodeposition technique, the TiO2nanoparticle was added into the Sn film to make the Sn-TiO2composite solder joint. In order to study the effect…
Metal nanoclusters, composed of a few to a hundred atoms, whose size is close to the Fermi wavelength of electrons, have become a new type of phosphor materials due to their unique electronic structure and excellent performance. And metal nanoclusters have been applied in various applications, such as bioimaging, chem…
Deep submersible lighting with LED as the light source commonly used sapphire glass as a pressure-resistant transparent window, but the refractive index of sapphire glass is 1.76~1.78, which will produce sizeable specular reflection at the interface with air, resulting in loss of light energy. To solve this problem, a…
Laser illumination is considered to be a revolution of new lighting technology due to its high efficiency and pure color. However, due to the high energy density of the laser source and the low thermal conductivity of phosphor convertor materials, overheat has become a serious problem. It was found that under the same…
The scattering effect is profitable to improve the optical performance of quantum dot (QD) white light-emitting diodes (LEDs), however, most of previous studies were focused on the planar packaging structure for reducing the total internal reflection loss. In this report, SiO2 nanoparticles were doped into QD-silicone…
This study was carried out to evaluate the high-temperature and long-term reliability of a GaN/DBA die-attached module with Ag sinter joining and with high temperature solder in a harsh thermal aging process. And its performance compared with high temperature Pb-5Sn solder. A GaN die was structurally sound bonded on a…
Achieving good light management is key for quantum dots (QDs) - polymer hybrid films, which are increasingly used in display and lighting applications in tandem with light emitting diodes. To overcome the insufficient absorption of blue light by the QDs and light trapping of downshifted emission, we propose an approac…
Laser-assisted glass frit bonding as a noncontact thermal bonding method has been widely applied in the organic light-emitting diodes (OLEDs) encapsulation field. However, blue light emitting from the OLEDs devices could cause many hazards. Therefore, it is of significance to develop a high reliable packaging technolo…
In this study, the shear performance and fracture behavior of micro-scale BGA structure Cu/Sn-3.0Ag-0.5Cu/Cu joints under electro-mechanically coupled loads with different loading rates (from 0.1 N/min to 1 N/min) and current densities (6.0×103A/cm2, 8.0×103A/cm2and 1.0×104A/cm2) have been investigated. The results sh…
It is proposed that the vertical type photodetectors based on all-inorganic perovskite quantum dots (QDs) with the Au ring electrode in the structure of indium tin oxide (ITO)/ zinc oxide (ZnO)/ CsPbBr3QDs/ Au. The incident light from the Au ring electrode side can be harvested directly by CsPbBr3QD film and the photo…
Polymer electrolytes are key enablers in solid flexible devices for sensing, ac-line filtering and energy storage. While most of the reports in literature are focusing on demonstration of their important functionalities and promising performance in pristine devices, little attention has been given to the long term ser…
In this research, the integration of the GaN micro-LEDs with a-Si:H TFTs on plastics substrate is demonstrated. Considering the thermal limit of the plastic materials, a low-temperature process was developed to fabricate an array of a-Si:H TFTs on a flexible substrate. A wafer bonding and laser-liftoff procedure was u…
A compact low-profile planar antenna for WLAN and WiMAX applications based on multiplex usage of left-handed metamaterial (LHM) is presented in this paper. The antenna is a double-sided dual-band LHM surrounded by a G-style monopole antenna. Because of the near field resonant parasitic (NFRP) theory, the employment of…