How does a crystal in an LED emit light when a voltage is applied?

The crystal in the LED emits light through the combination of electrons and holes when a voltage is applied.

Principle of Luminescence

The core of an LED is a chip composed of P-type and N-type semiconductors. When a voltage is applied, electrons and holes recombine at the P-N junction, releasing energy that is emitted in the form of light.

Electronic Transition

During the luminescence process, electrons transition from high energy states to low energy states, with the excess energy being released in the form of photons, resulting in the emission of light.

Color Determinants

The color of the LED light is determined by the semiconductor material used. Different materials can emit light of specific wavelengths, thus producing different colors.

High Efficiency and Energy Saving

LEDs have a high photoelectric conversion efficiency, converting electricity into light at a ratio of over 60%, far higher than traditional light sources, making them more energy-efficient.

Long service life

The average lifespan of LED lighting fixtures can reach more than 50,000 hours, mainly due to the optimization of their semiconductor materials and structural design, which gives them good durability and stability.

Environmental Features

LED is a fully solid-state light-emitting device. It is resistant to shock and impact, not easy to break, and waste products can be recycled without pollution, which is beneficial to environmental protection.

Quick Start and Dimming

LED lighting fixtures can instantly reach full brightness and support dimming functionality. Users can adjust the brightness according to their needs to achieve energy-saving and scenario lighting requirements.

Wide Application Areas

The luminous principle of LED lamps and lanterns is widely used in various fields, not only improving lighting effects and energy efficiency, but also promoting the innovation and development of the lighting industry.