nagative lipid + positive lipid

Dipole, literally, means "two poles," two electrical charges, one negative and one positive.

We say that neurons have an electrochemical charge, and this charge changes, depending on whether the neuron is at rest or is sending a signal.

A light-emitting electrochemical cell (LEC or LEEC) is a solid-state device that generates light from an electric current (electroluminescence). ... Aside from the mobile ions, their structure is very similar to that of an organic light-emitting diode (OLED).

An electric dipole deals with the separation of the positive and negative charges found in any electromagnetic system. A simple example of this system is a pair of electric charges of equal magnitude but opposite sign separated by some typically small distance. (A permanent electric dipole is called an electret.)

It is inevitable that electroluminescent devices, notably light-emitting diodes (LEDs), organic LEDs (OLEDs), and light-emitting electrochemical cells (LECs), will heat up during operation because of Joule heating,[1] the formation of dark and quenched excitons,[2] and self-absorption.[3] This self-heating is an unfortunate and problematic issue, since a too high operational temperature results in a severe drop of the device efficiency and premature device failure.[4] Accordingly, a significant number of studies on the cause and consequences of self-heating, and on how to alleviate its effects, are available in the scientific literature for both LEDs[1] and OLEDs.[1, 4, 5]

A LED is a compact point emitter that features a very high luminance from a small spot; it is, as such, clearly different from an OLED or a LEC, which are thin-film surface emitter