How does the size of the LED chip affect the optoelectronic properties of the LED?
Why are LED chips divided into different sizes such as 8mil, 9mil...13 to 22mil, 40mil, etc.? How does size affect the optoelectronic properties of LEDs?
The size of LED chips can be divided into low-power chips, medium-power chips and high-power chips according to the power. According to customer requirements, it can be divided into single tube level digital level and point Chen level. and decorative lighting. As for the specific size of the chip, it depends on the actual production level of different chip manufacturers. There are no specific requirements. As long as the process passes the chip, the unit output can be increased and the cost can be reduced. The photoelectric performance will not fundamentally change, the current used by the chip is large, and their unit current density is basically the same. If the current used by the 10mil chip is 20mA, then the theoretical current used by the 40mil chip can be increased by 16 times, that is, 320mA. However, considering that heat dissipation is the main problem under high current, its luminous efficiency is lower than that of small current. On the other hand, due to the increase of the area, the bulk resistance of the chip will be reduced, so the forward conduction voltage will be reduced.
