Ning Wang

University of Shanghai for Science and Technology | USST · Shanghai Key Laboratory of Modern Optical Systems

A single-inductor, low-voltage, three-step self-starting boost converter is proposed for photovoltaic (PV) energy harvesting. In order to enhance energy transfer efficiency, a variable-step Perturb and Observe (P&O) Maximum Power Point Tracking (MPPT) scheme has been devised based on a novel pulse multiplication technique. Upon overcoming the speed...

This letter presents an innovative bilayer Y-type transverse thermoelectric generator (TEG) based on Low Temperature Co-Fired Ceramics (LTCC) technology. A non-contact vertical thermal coupling structure is proposed for the bilayer thermocouples (TCs), where longitudinal heat flow and transverse current are synchronized. To enhance the energy harve...

A high-efficiency indium gallium nitride (InGaN) laser photovoltaic cell (LPVC) was demonstrated to achieve a photoelectric conversion efficiency (η) of 23.09% by incorporating an AlGaN strain compensation layer (SCL) grown on a (0001)-oriented patterned sapphire substrate (PSS). The photoluminescence spectra confirm that the peak splitting is redu...

Based on the characteristics of phase change concentrated heat, this paper proposes a photovoltaic/phase change/thermoelectric (PV-PCM-TE) self-supply system with sidewall integrated TE. In the system, an intelligent control circuit for phase change time is designed to intelligently switch the TE working mode using real-time temperature tracking. T...

A high-efficiency InGaN photo cell irradiated by 532 nm laser (at green wavelength) with AlGaN electron blocking layer (EBL) is proposed based on the blue-green light window effect of seawater. First, the InGaN/GaN multiple quantum wells (MQWs) structured material intercalated with AlGaN EBL was designed and grown for InGaN photo cells. Then, using...

Based on equal precision frequency measurement and pulse counting technique, a multi-period synchronous frequency measurement method is proposed in this paper. A programmed cymometer is designed with a full frequency band with equal precision measurement and improved measurement accuracy. In addition to adopting a low-power gate-control clock techn...

To solve the global energy crisis, renewable energies need to play a crucial role in people's daily lives. Among them, solar energy is one of the most widely used since it is abundant on Earth, and pollution free with respect to the environment. Increasing attentions have been paid to study the effective usage of solar energy. Photovoltaic (PV) cel...

In this article, an intelligent cooling system for a high-power light-emitting diode (LED) based on a temperature feedback mechanism is presented. The proposed system applies a photovoltaic panel and thermal sensing power supply to operate cooperatively to realize self-sufficiency for electrical energy harvesting. Taking the thermistor as a bridge,...

A photovoltaic thermoelectric hybrid (PV-TEH) system with intelligent power supply management is proposed in this paper. Combining the advantages of the thermoelectric generator (TEG) and the thermoelectric cooler (TEC), the TE intelligent switching circuit and the water speed regulation circuit are presented in this system. Due to the energy harve...

In this article, the authors theoretically and experimentally investigate the mechanism of degradation of InGaN/GaN multi-quantum well (MQW) solar cells. InGaN/GaN MQW solar cells with chips of size 1 $\times$ 1 mm $^{\text{2}}$ were fabricated and characterized within a range of temperature of 50 $^{\circ}$ C–250 $^{\circ}$ C to determine t...

A photovoltaic-thermoelectric hybrid (PV-TEH) system with intelligent thermal management based on the dual functions of thermoelectrics (TEs) is proposed to improve the conversion efficiency of PV cells. The performance of PV cells is highly dependent on the cell temperature, and the temperature gradient can also be used to generate additional elec...

The thermoelectric generator (TEG) is typically used as a clean power supply to harvest waste heat energy in applications involving a large thermal gradient, such as industrial heat removal and power electronic equipment systems. However, it is often difficult to achieve the optimal output power in the loop of the array system of the TEG owing to d...

In this work, an analytical model of strain and stress of symmetrical multilayer medium is proposed to solve the thermal problem that occurs in silicon-core coaxial through-silicon vias (S-CTSV). Based on the 3-D Kane–Mindlin theory, the proposed analytical model of strain considers both elastic strain and thermal strain. In addition, the stress is...

In breast cancer diagnoses, antagonist compounds are used to resist $\alpha $ Subtype of Estrogen Receptor (ER $\alpha$ ) bioactivity. However, those compounds are difficult to be obtained in the process of drug screening. In this paper, an efficient bioactivity prediction model is proposed with consideration of Absorption, Distribution, Metabol...

As an electronically controlled glass whose transmittance varies with voltage, polymer dispersed liquid crystal (PDLC) has the advantages of good privacy, high transmittance, fast response speed, and good heat shielding performance. It can be applied to electronically controlled building windows. However, PDLC needs to consume extra power, and elec...

The early prediction and accurate tracking of the thermal characteristics of the CPU of a server can help avoid thermal failure and runaway due to defects in its thermal design. This study proposes a method of thermal monitoring and temperature prediction based on infrared thermocouples. A nine-channel whole-machine thermal monitoring system based...

This paper proposes an efficient thermoelectric temperature control system based on an improved proportional integral differential algorithm in which energy feedback technology is used to enhance thermoelectric cooling. In the proposed power management system, two groups of batteries are efficiently and alternatingly charged and discharged such tha...

A photovoltaic-thermoelectric (PV-TE) hybrid system can be used for efficient thermal energy utilization from the generated waste heat in PV device. In this paper, an efficient PV-TE hybrid System with intelligent power-track switching technique and thermal management based on energy conversion is proposed. To make the output power of PV-TE system...

Thermoelectric coolers (TECs) are widely used in state-of-the-art thermal management systems. Recently, there is a big trend to power TECs using thermoelectric generators (TEGs). Mainstream research efforts focus on attaining a higher figure of merit ( ZT ) of thermoelectric material, which now faces a great challenge. Alternatively, this article...

With the development of high-power light-emitting diodes (LEDs), the heat flux density of devices has continued to increase, which in turn requires the development of increasingly effective methods of heat dissipation to control the working temperature of LEDs. Due to their impressive performance in solid refrigeration and energy harvesting, thermo...

A dual‐gate graphene thermoelectric device structure is proposed. Under the control of back‐gate and top‐gate voltage, the type and degree of carrier transport in graphene channels can be changed, where the absorption and release of heat are controlled at the contact between graphene and metal electrodes. More details can be found in article number...

The high junction temperature for a working light-emitting diode (LED) will lead to a decrease in luminous efficiency, redshift in wavelength, and shortened lifetime. Conventional cooling methods such as air cooling and water cooling cannot meet the heat dissipation requirements of highly integrated high-power LED cooling systems. A thermoelectric...

The band gap, the carrier concentration and the polarity in graphene can all be controlled by the gate voltage, which provides a new opportunity for the study of the regulation of thermoelectric devices. In this paper, a dual‐gate thermoelectric device model for graphene with top‐gate and back‐gate structures was proposed. Based on the influence of...

Single-layer graphene (SLG) sheets can exhibit thermoelectric properties under the control of gate voltage. The controlled factors and regulation mechanism of SLG thermoelectric properties have become research hotspots. In this paper, a SLG thermoelectric parameter model considering carrier concentration and mobility with temperature and gate volta...

In this article, a comprehensive and efficient thermal management system is proposed to harvest and reuse the thermal waste of high-power light-emitting diodes (HP-LEDs) for the first time. Besides a conventional cooling system, including a thermoelectric (TE) cooler (TEC), a heatsink, and a fan, the proposed thermal management system also employs...

In this paper, a waveguide with metal shielding and a three-dimensional extension component is proposed with frequencies up to 110 GHz. By increasing the relative area between the signal line and the ground plane vertically, the electromagnetic field is limited within the air-dielectric cavity. By embedding metal shielding strip arrays into silicon...

Half-mode substrate integrated waveguide (HMSIW) is a high-pass transmission line, which can be easily integrated into planar circuits. Compared with substrate integrated waveguide (SIW), HMSIW features wider relative bandwidth and smaller size. Quadrature phase shift keying (QPSK) scheme can double the signal transmission rate compared with simple...

The high temperature makes electronic components bear excessive thermal loads, which significantly degrade the performance of devices. The thermal issues in technological applications, such as DNA microarrays and micro-electrothermal systems, have been addressed by using high performance thermoelectric cooler. In this paper, a folded structure of t...

Graphene provides a new opportunity for thermoelectric study based on its unique heat transfer behavior controllable by a gate voltage. In this paper, an effective thermal conductivity model of graphene for thermoelectric cooling is proposed. The model is based on a double-voltage-control mechanism. According to the law of Fourier heat conduction,...

As thermoelectric coolers (TECs) have become highly integrated in high-heat-flux chips and high-power devices, the parasitic effect between component layers has become increasingly obvious. In this paper, a cyclic correction method for the TEC model is proposed using the equivalent parameters of the proposed simplified model, which were refined fro...

In this paper, Quadrature Phase Shift Keying (QPSK) modulation and demodulation system based on a Substrate Integrated Waveguide (SIW) is designed and implemented for high-speed data transmission. The technique of orthogonal multiplexing allows two independent channels to transmit data simultaneously through one waveguide structure. For this proof-...

Based on the Peltier effect, thermoelectric coolers (TECs) have been widely used in solving thermal management issues for semiconductor devices such as semiconductor laser, charge-coupled devices and nanoelectronic circuits with hot-spots. However, performance control mechanisms especially voltage-controlled parameters for TEC still face challenges...

Power integrity (PI) is among the main concerns in the design process of multilayer packages and printed circuit boards (PCBs). Based on Transmission Matrix Method (TMM), the PI performance of a Ball grid array (BGA) package mounted on a PCB is investigated in this paper. The power/ground planes and the power/ground balls on a PCB and package are e...

Seeking for an available thermal runaway solution is becoming one important and challenging issue in current nanometer ICs. Thermoelectric coolers (TECs) may give a solution. In this paper, a simplified power model of circuits closely associated with temperature with and without repeaters is derived. Based on the surface temperature difference and...

Substrate integrated waveguide (SIW) is regarded as an available interconnects solution for high-speed data transmission. In this paper, in order to further improve the data rate and bandwidth usage, an SIW interconnect system based on Quadrature Phase Shift Keying (QPSK) modulation and demodulation technique is proposed. The associated theoretical...

A high-speed data transmission system using half mode substrate integrated waveguide (HMSIW) is proposed in this paper. The HMSIW transmits the signal by TE0.5,0 mode so the channel bandwidth is from the cutoff frequency of TE0.5,0 mode to the cutoff frequency of TE1.5,0 mode. In contrast, the traditional SIW transmits the signal by TE10 mode and t...

In this paper, A novel wide-band uniplanar electromagnetic band gap (EBG) structure composed of complimentary split ring resonator (CSRR) and X shape bridge, called the X-CSRR EBG structure, is proposed to suppress ground bounce noise (GBN) and simultaneous switching noise (SSN) in power ground plane. Compared with conventional uniplanar EBG struct...