Charge Separation Enhancement Enables Record Photocurrent Density in Cu2ZnSn(S,Se)4 Photocathodes for Efficient Solar Hydrogen Production (Adv. Energy Mater. 19/2023)

Solar Hydrogen Production The image representing article number 2300215 by Shuo Chen and co-workers depicts photo-electrochemical water splitting that converts solar energy into hydrogen energy, presenting obvious hydrogen bubbles emerging from the photocathode surface to the electrolyte under light illumination. The blue columnar rods indicate high-quality Cu2ZnSn(S,Se)4 with large crystal grains and benign growth orientation. The yellow spheres denote photoelectrons, indicating efficient charge carrier generation, separation and transport.