Mechanical stimulus produced piezoelectric charges could modulate the local energy band near interface to control the performances of electronics and optoelectronics, whereas almost half of the piezoelectric charges are electrostatically screened by the Ohmic contact and not effectively utilized. Multi-layer structured devices should be adopted to introduce multiple interfaces, so that most or even all of the piezoelectric charges could be effectively utilized. Such piezoelectric charge modulation on the multi-layer structured devices is proposed as Bilateral Piezoelectric Charge Modulation (BPCM). In this work, the concept of BPCM is illustrated and explained in detail and we further demonstrate the BPCM on the performances of a floating-base PNP heterojunction bipolar phototransistor (HBPT). The results indicate an interesting optimization modulation behavior. The working mechanism of BPCM in PNP HBPT is carefully illustrated and thoroughly discussed by analyzing the piezoelectric charges induced modulation of energy band near the two interfaces of PNP HBPT and its effects on photo-carriers’ dynamics. This work not only proposes the BPCM and further demonstrates it in a floating-base PNP HBPT successfully, but also presents the BPCM’s huge potential in advanced electronics and optoelectronics as a perspective of piezo-phototronic effect in multi-layer structured piezoelectric semiconductor devices.

机械刺激产生的压电电荷可以调节界面附近的局部能带以控制电子和光电的性能，而几乎一半的压电电荷被欧姆接触静电屏蔽而没有得到有效利用。应采用多层结构器件引入多个界面，以便有效利用大部分甚至全部压电电荷。多层结构器件上的这种压电电荷调制被提议为双边压电电荷调制（BPCM）。在这项工作中，详细说明和解释了 BPCM 的概念，我们进一步证明了 BPCM 对浮基 PNP 异质结双极光电晶体管 (HBPT) 性能的影响。结果表明一个有趣的优化调制行为。通过分析 PNP HBPT 两个界面附近的压电电荷引起的能带调制及其对光载流子动力学的影响，详细说明并深入讨论了 PNP HBPT 中 BPCM 的工作机制。这项工作不仅提出了 BPCM 并在浮基 PNP HBPT 中进一步成功地证明了它，而且从多层结构压电半导体器件中的压电光电子效应的角度展示了 BPCM 在先进电子学和光电子学中的巨大潜力。