Yi Zhang

Ultrafast In-Plane Photo-Dember Ring at Buried Semiconductor Heterointerfaces Visualized by Scanning Ultrafast Electron Microscopy

Abstract The ultrafast transport dynamics of photogenerated carriers at buried semiconductor heterointerfaces govern the operation of modern optoelectronic devices, yet direct real-space visualization of in-plane carrier motion at such interfaces has remained an outstanding exper...

Boosting Open‐Circuit Voltage to a Record 0.692 V in Solution‐Processed CIGSSe Solar Cells Through Surface Ga‐Rich Engineering

ABSTRACT The open‐circuit voltage ( V OC ) deficit remains a primary bottleneck hindering the efficiency of solution‐processed Cu(In,Ga)(S,Se) 2 (CIGSSe) solar cells, largely due to the uncontrolled elemental diffusion during high‐temperature selenization that prevents the format...