Paavo’s work grabbed a supplementary cover in Chemistry of Materials | Vol 35, No 7. Congratulations to all the authors.
Read the article here: Less Is More: Simplified Fluorene-Based Dopant-Free Hole Transport Materials Promote the Long-Term Ambient Stability of Perovskite Solar Cells | Chemistry of Materials (acs.org)
The beautiful cover image has been drawn by Dr. Laura Canil (canilvisuals.com)