Device both harvests electricity from light/ emits bright visible light utilizing multi-resonance thermally activated delayed fluorescence

https://www.isct.ac.jp/en/news/7r7qf39sliog

"lightweight, mechanically flexible, semitransparent organic semiconductors... suppressed non-radiative recombination, preventing captured energy from being lost as heat... resulting layered device: 1.36% power-conversion efficiency, 2% light-emission efficiency... 1st organic device exceeding 1% in both categories... emits bright red light matching commercial smartphone display luminance while operating at a standard lithium-ion battery-compatible 3.2 volts... power-generating displays, wearables"