What is the difference between OLED and led?
Author:Zhang Xuehong Time:2021-07-05 13:30 Browse(353)
An organic material, an inorganic material.
An organic material, an inorganic material.
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What is the difference between OLED and led?

OLED.
that is, organic light-emitting diode (OLED), also known as organic electroluminescence display (OLED).
the light-emitting principle of OLED is similar to that of OLED.
when the device is under direct current (DC; DC); The applied voltage energy will drive the electron and hole into the device by cathode and anode respectively, when they meet and combine in the conduction, When the chemical molecules are excited by external energy,
if the electron spin and the ground state electrons are paired, they are singlet, and the light emitted is so-called fluorescence; On the contrary, if the spins of the excited state and the ground state are unpaired and parallel, it is called triplet, and the light emitted is called phosphorescence.
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when the state position of the electron returns from the high energy level of the excited state to the low energy level of the steady state.
the energy of the electron will be emitted in the form of light emission or heat dispersion, respectively, The part of photon can be used as display function; However, the triplet phosphorescence can not be observed at room temperature, so the theoretical limit of the luminous efficiency of PM-OLED is only 25%
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LED (light emitting diode) is a kind of solid-state semiconductor device, which can directly convert electric energy into light energy.
the heart of LED is a semiconductor chip.
one end of the chip is attached to a bracket, which is the negative pole, and the other end is connected to the positive pole of the power supply, The whole wafer is encapsulated by epoxy resin.
the semiconductor wafer is composed of two parts.
one part is p-type semiconductor, in which the holes are dominant, and the other end is n-type semiconductor, There are mainly electrons here.
but when the two semiconductors are connected, a "p-n junction" is formed between them.
when the current acts on the wafer through the wire.
the electrons will be pushed to the p region, where the electrons and holes compound and then emit energy in the form of photons, This is the principle of LED light emission.
and the wavelength of light (the color of light).
is determined by the formation of p-n junction materials.
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don't be so confused if you don't know.
the principle of LED and OLED light emission is the same, but the difference is that they use different materials. Led uses metal materials, OLED uses organic materials.
of course, the price of OLED is cheaper.
but the light efficiency of OLED can't be improved.
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