Trifunctional panel combining a photo-electrochromic device and an OLED module. All-printed 12×17 cm2 PEC module, with DSSC (η=2.4%) and EC area (ΔT =42% @700 nm). 10×8 cm2 transparent white OLED with an efficiency of 3 cd/A at 100 mA cm−2. Screen printable tungsten paste for EC layer low-cost deposition.