柔性有机无机杂化pn结自驱动光电探测器及其应变调控机制研究

柔性和自供能是微纳电子器件向小型化和多功能化发展的重要趋势。自驱动光电探测器利用半导体异质结内建电场分离光生电子空穴对产生光电流，达到无源光探测的目的。采用压电半导体材料构建的光电器件中，通过应变产生的压电势调控界面能带结构是优化器件性能的重要手段。应变普遍存在于柔性器件中，因此研究应变调控柔性器件性能的基本规律和机理对发展柔性自驱动光电探测器具有重要意义。本项目拟采用低维压电半导体材料ZnO和MoS2与p型有机半导体材料PEDOT:PSS和Spiro-MeOTAD构建柔性自驱动光电探测器。将低维无机纳米材料高效载流子输运特性与有机半导体材料丰富的电子结构和高吸光率特性相结合。研究器件在应变下的服役行为，发现应变对器件性能的影响规律，揭示压电极化电场对有机无机杂化界面能带结构和结区载流子输运行为的调控机制。

To fabricate flexible and self-powered nanodevices is a promising route to realize the miniaturization and functionalization of micro-nano electronics. Self-powered photodetectors utilize the built-in electrical field at the interface of semiconductor heterojunction to separate the photo-generated carriers. Utilizing piezopotential to modify the interface energy band structure is an advanced method to enhance the performance the piezoelectric nanomaterial based nanodevices. Because the strain always exists in flexible electronics, it is meaningful to investigate the performance modulation mechanism under strains. In this program, a series of flexible inorganic-organic hybrid self-powered photodetector was constructed with piezoelectric semiconductor of ZnO and MoS2 and p-type organic of PEDOT:PSS and Spiro-MeOTAD. The high carrier transportation of inorganic nanomaterials and the abundant electron structure and absorptivity of organic materials are combined with in these flexible device. The behavior of the device under strain is studied to investigate the modification regulation of the performance and the mechanism of the band structure variation and the electrons transport behavior at the inorganic-organic hybrid interface.