Journal Article Research Support, Non-U.S. Gov't Fluorenes Polymers Polystyrenes Research Support, U.S. Gov't, Non-P.H.S. Thiophenes X-ray detector anode interlayers bulk heterojunction cathode interlayer direct detection dual energy detection flexible substrate hyperbranched polymer interfaces metal halide perovskite metal oxides poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) polymer solar cells roll-to-roll printing scanning kelvin probe solar cells