Yu Yan's work on PEI modification enabled light-soaking-free OPVs is accepted in ACS AMI

Yu Yan's work on PEI modification enabled versatile device structures for light-soaking-free inverted polymer solar cells is accepted in ACS Applied Materials & Interfaces. The special modfication of PEI to TiO₂ nanoparticles enables PEI to be located on top, in the bulk or underneath the TiO₂ electron-transport layer, all effective at eliminating the light-soaking issue that is commonly observed in metal-oxide based inverted polymer solar cells.