Poly(ionic liquid)-Doped Spiro-OMeTAD for Over 20% Efficiency and Hysteresis-Free Perovskite Solar Cells

Camille Geffroy, Eftychia Grana, Zeguo Tang, Samy Almosni, Anirudh Sharma, Fumyasu Way, Takeru Bessho, Eric Cloutet, Thierry Toupance, Hiroshi Segawa, Georges Hadziioannou.  ACS Applied Energy Materials, 2020, doi.org/10.1021/acsaem.9b01819.