The Light emitting diode is a semiconductor light source. LED is a kind of diode with two leads as anode and cathode. When the two leads receive a sufficient power supply, electrons and hole combine each other. During their combining process, a small amount of energy released in the form of light or photon. This principle is Electroluminescence. The material made of Gallium as a base material.
In order to increase the light being released from the LED, PLED designed. PLED stands for Perovskite LED. Perovskite consists of Ca, Ti and O2. This kind of LED designed by two groups of scientists for the past four years.
This contains hybrid organic-inorganic based materials. This design breaks the major barrier in normal LED i.e., the external quantum efficiency(EQE) of the devices. The EQE indicates the number of photons to produced per electron. This factor in PLED is increasing by 20%. Researchers designed this in a two different way with higher efficiency.
Design of PLED:
LED contains two semiconductor layers. When sufficient supply given to these material means, recombination of electrons and holes occur. This produces the light. Similarly. PLED contains two semiconductive layers with a Perovskite layer of 200nm in Electrode. This could probably increase the number of photons. The photons released during recombination pumped into perovskite layer which in turn increases the efficiency. The perovskite layer uses solution which produces the emitting component required for LED.
Several techniques used initially to enhance the LED. One of the designs, PLED using small-sized crystal placed between a Gold electrode and a transparent electrode separated by an organic material. This technique the amount of photon released from the LED. Another technique, semiconductor placed between an organic and an aluminum electrode. This also increases the charges to send to the perovskite layer, thereby increasing the number of photons.