Due to the introduced PN junction, the photocurrent is made up by both electronic and pole.As a result, the sensitivity and signal to noise ratio are increased, the parasitic capacitance is decreased.

• 由于引入PN注入结，新型光电器件沟道电流同时存在电子电流和空穴电流，提高了器件的响应灵敏度，避免了大的寄生电容，提高了信噪比。