Figure 1: Schematic diagram of the new upconversion device. a, Device structure, consisting of a phosphorescent organic light-emitting diode (OLED) and a vertical phototransistor.

In October 2014, the Royal Swedish Academy of Sciences issued a statement in which it said, “Incandescent light bulbs … lit the 20th century; the 21st century will be lit by LED lamps.” The ...

D. Y. Kondakov: "Characterization of Triplet-triplet Annihilation in Organic Light-emitting Diodes Based on Anthracene Derivatives," J. Appl. Phys., Vol. 102, pp. 114504-114508 (2007) ...

Quantum dot light-emitting diodes (QLEDs) are paving the way for them to emerge as the leading technology in next-generation solid-state lighting and flat panel display. Additionally, the stringent ...

To be more energy efficient, many people have replaced their incandescent lights with light-emitting diode (LED) bulbs. However, those currently on the market emit a lot of blue light, which has ...

Unlike filament lamps, where electrical energy must be converted into heat before light can be produced, Light Emitting Diodes (LEDs) are able to transform electrical energy directly into light ...

Light pollution has been a growing problem for decades, and the recent introduction of LED (light emitting diode) bulbs has increased the amount of light coming from cities by a considerable amount.

Diodes are electronic components that can be used to regulate the voltage in circuits and to make logic gates. Light-emitting diodes (LEDs) give off light and are often used for indicator lights ...