We propose a simple, efficient and selective hydroxyl radical generation system based on the photolysis of submicromolar concentrations of nitrite using a high-power ultraviolet light emitting diode (UV-LED). Hydroxyl radical formation by the 6.75-W UV-LED was at least 10 times greater than that by a 300-W Xe lamp. In the UV-LED system, the
Customer ServiceSOLED brings together leading international experts in optical sciences and technology for solar energy light-emitting devices. The meeting covers the latest developments in optics, photonics and advanced materials for the next generation of photovoltaic (PV) solar cells and light-emitting diodes (LEDs).
Customer ServiceMinimizing heat accumulation is essential to prolonging the operational lifetime of quantum dot light-emitting diodes (QD-LEDs). Reducing heat generation at the source is the ideal solution, which
Customer ServiceOrganic light-emitting diodes (OLEDs) rely on the electroluminescence of organic semiconductors, which refers to the phenomenon that organic, typically polymeric and small molecular materials with semiconductor characteristics emit light under the excitation of... Skip to main content. Advertisement. Account. Menu. Find a journal Publish with us Track your
Customer ServicePerovskite light-emitting diodes (PeLEDs) provide excellent opportunities for low-cost, color-saturated, and large-area displays. However, the performance of blue PeLEDs lags far behind that of their green and red counterparts. Here, we show that the external quantum efficiencies (EQEs) of blue PeLEDs scale linearly with the
Customer ServiceMetal halide perovskite light-emitting diodes (PeLEDs) are increasingly recognized as a new-generation candidate for efficient, low-cost, and vivid displays due to their outstanding optical and electrical properties (1–6).
Customer ServicePerovskite light-emitting diodes (PeLEDs) provide excellent opportunities for low-cost, color-saturated, and large-area displays. However, the performance of blue PeLEDs lags far behind that of their green and red
Customer ServiceOur analysis reveals an exciting horizon in microbial disinfection, where the integration of UV LED systems with cutting-edge technologies such as sensors, solar power, Internet-of-Things (IoT) devices, and artificial intelligence algorithms promises high levels of precision and efficacy in disinfection practices.
Customer ServiceSOLED brings together leading international experts in optical sciences and
Customer ServiceAbstract: This work evaluates the concept of employing light-emitting diodes (LEDs) to harvest solar energy. Due to the optical properties of the semiconductor materials employed in the fabrication of LEDs, LEDs can absorb photons and generate electron-holes. Thus, in principle LEDs can behave as small solar cells from which power can be
Customer ServiceWe examine the correlation of the latter with the spectral response and the
Customer ServiceLight shining on a solar cell produces both electric current and bias voltage to generate electric power. This process requires firstly the generation of electron and hole carrier s by the
Customer ServiceRapid developments in LED (light-emitting diode) lighting systems have made
Customer ServiceLight shining on a solar cell produces both electric current and bias voltage to generate electric power. This process requires firstly the generation of electron and hole carrier s by the
Customer ServiceMetal halide perovskite light-emitting diodes (PeLEDs) are increasingly recognized as a new-generation candidate for efficient, low-cost, and vivid displays due to their outstanding optical and electrical properties (1–6).
Customer ServicePerovskite light-emitting diodes (LEDs) have reached external quantum efficiencies of over 20% for various colours, showing great potential for display and lighting applications. Despite the
Customer ServicePhosphor-converting white light-emitting diodes (WLEDs) are promising and particularly appealing solid-state light sources, which are expected to change the way we light our homes and businesses. Lead-halide perovskites have recently received extensive research attention as a new class of phosphors in WLEDs owing to their high photoluminescence
Customer ServiceWe examine the correlation of the latter with the spectral response and the available light, demonstrating that visible-wavelength diode emitters can yield very high conversions in the photovoltaic mode. We report measured quantum efficiencies as high as 39% under low-intensity (100 µW/cm 2) fluorescent illumination. 1. Introduction.
Customer ServiceAbstract: This work evaluates the concept of employing light-emitting diodes (LEDs) to harvest
Customer ServiceLighting technology is continuously improving for greater comfort, higher power efficiency and due to concerns about health and environment issues. The evolution of lighting technology through conversion of electricity into light led
Customer ServiceThe capabilities of light-emitting diodes (LEDs) based on two-dimensional materials are restricted by efficiency roll-off, which is induced by exciton–exciton annihilation, at high current
Customer ServiceOrganic semiconductor heterojunction as charge generation layer in tandem organic light-emitting diodes for high power efficiency. Org Electron 2012; 13 : 1121–1128. Article Google Scholar
Customer ServiceOur analysis reveals an exciting horizon in microbial disinfection, where the
Customer ServiceRapid developments in LED (light-emitting diode) lighting systems have made this technology a potential candidate for PV-powered lighting systems. This study analyzed the efficiency of each...
Customer ServiceThis chapter focuses on introducing basic concepts in solar cell and light-emitting diode (LED) devices. First, the fundamental knowledge about semiconductors and several important materials related to solar cells and LEDs is introduced to help the reader understand the working principle of devices. Second, we describe the working principle and
Customer ServiceNext-generation light-emitting diodes (LEDs) in lighting and display applications may employ these QD materials as alternative light-emissive materials. Although QLEDs have excellent performance, several factors limit
Customer ServiceMetal halide perovskites (MHPs) have been emerging as the rising star in the field of optoelectronics during the past decade, and the state-of-the-art optoelectronic technologies based on MHPs, such as perovskite solar cells (PSCs), light emitting diodes (LEDs), photodetectors (PDs) and lasers, have been leading the prevailing paradigm owing to the
Customer ServiceLight-emitting diodes (LEDs) are attracting considerable attention around the world. Phosphor materials, as crucial color-converted components, play central roles in LED development. The demands for phosphor materials have become increasingly stringent over the past decades, from high brightness to narrowband emission or function-dependent spectrum
Customer Service1. Introduction Light-Emitting Diodes (LEDs) are primarily p-n junction-based devices made of direct bandgap semiconductors and emit light when an electric current is injected into the device . The choice of a particular semiconductor material (direct bandgap) is essential to achieve the required wavelength.
Additionally, Losev’s thorough investigation into injectional and prebreak down luminescence effects contributed significantly to the field, which led to in his receipt of the first patent for a pre-sample to the light-emitting diode in 1927 .
An ideal solar cell behaves li ke a diode and may be modeled by a current source in para llel with a diode. The diode is formed by a p-n junction, bias (V< 0) in the dark condition. This rectifying behavior is a feature of photovoltaic devices. light intensity. Th e photocurrent is divided into two pathways going through the diode and the
The diode is formed by a p-n junction, bias (V< 0) in the dark condition. This rectifying behavior is a feature of photovoltaic devices. light intensity. Th e photocurrent is divided into two pathways going through the diode and the load, respectively. The current density of each pathway depends on the resistance of the load
In 2022, the development of pure-colored red, green, and blue quantum dot light-emitting diodes using emitting layers composed of cadmium-free quantum dots and organic electron-transporting materials were reported, demonstrating advancements in achieving high color purity in green LEDs . 2.4. Evolution of Red LEDs
The first practical red light-emitting diode (LED) was developed by a team of researchers led by Nick Holonyak Jr. at General Electric (GE) in 1962 . They used Ga (As 1−x P x) for the fabrication of diodes with a polished active area of 10 −3 cm 2 and a donor impurity concentration greater than 10 18 cm −3.
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