Enzheng SHI

Halide perovskite solar cells and light-emitting diodes have developed rapidly, yet they still have unsolved problems such as the poor stability of these materials and the fast ionic migration within the lattice. To tackle these challenges, Enzheng Shi made original contributions to address these biggest bottlenecks for the commercialization of halide perovskite photoelectronic devices.

He prepared the first 2D halide perovskite epitaxial heterostructures. By introducing semiconducting conjugated ligands, the stability of the material was enhanced and the ionic migration was inhibited.

In addition, he fabricated atomically flat 2D halide perovskite van der Waals heterostructures and performed a quantitative study on the diffusion of halogen ions along the out-of-plane direction for the first time.

Enzheng also revealed the origin of the low-energy boundary phase of quasi-2D perovskite materials, and systematically studied the exciton diffusion and annihilation behaviors of 2D perovskite materials. He proposed a novel method for the directional assembly of carbon nanotubes and achieved the non-destructive assembly of ultra-clean carbon nanotube horizontal arrays with a high degree of arrangement, and he then used the method to prepare carbon nanotube and 2D semiconductor heterostructure arrays.

Based on these findings, he will strive to design and optimize novel halide perovskite materials, and heterostructures and develop high-performance, highly-stable optoelectronic devices.