PO 4 3− Tetrahedron Assisted Chelate Engineering for 10.67%‐Efficient Antimony Selenosulfide Solar Cells

Abstract Anisotropic carrier transport and deep‐level defect of antimony selenosulfide (Sb 2 (S,Se) 3 ) absorber are two vital auses restraining the photovoltaic performance of this emerging thin‐film solar cell. Herein, chelate engineering is proposed to prepare high‐quality Sb 2 (S,Se) 3 film based on hydrothermal deposition approach, which realizes desirable carrier transport and passivated defects by using tetrahedral PO 4 3− ion in dibasic sodium phosphate (Na 2 HPO 4 , DSP). The PO 4 3− Lewis structure, on one hand in the form of [(SbO) 3 (PO 4 )] chelate, can adsorb on the polar planes of cadmium sulfide (CdS) layer, promoting the heterogeneous nucleation, and on the other hand, the tetrahedral PO 4 3−…

• MU
  McGill University
• NN
  National Natural Science Foundation of China

  Award: 62074102
• GU
  Guangxi University
• NK
  National Key Research and Development Program of China

  Award: 2024YFB4205003