emitter layer

例句：

1. 1. Theemitter layer is responsible for the emissionof light from the LED.
   发射层负责从LED中发射光。
2. 2. Inthe emitter layer,electrons are accelerated byan electric field.
   在发射层中，电子被电场加速。
3. 3. The emitter layer plays a crucial role in theoperation of the solar cell.
   发射层在太阳能电池的操作中起着关键作用。