Journal Article solar cells Research Support, Non-U.S. Gov't Carbazoles Polymers Research Support, U.S. Gov't, Non-P.H.S. block copolymer donors charge extraction charge transport layers conducting polymers conjugated polyelectrolytes defect passivation diketopyrrolopyrrole‐based polymers ecofriendly colloidal nanocrystals electroluminescence (EL) high crystallinity intrinsically stretchable solar cells inverted polymer solar cells (iPSCs); polar solvents; PTB7; zinc oxide long-term stability low energetic disorder mechanical robustness mixed ionic-electronic conductors morphological control organic electrochemical transistors passivation perovskite perovskite light-emitting diodes (PeLED) perovskite solar cells perovskites poly(dimethylsiloxane)