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Cross-section schematic of the electrically driven laser; yellow arrows indicate laser feedback and output.
Structure of the electrically driven organic semiconductor laser. a, Chemical structure of TSBF and BBEHP-PPV. b, Cross-section schematic of the electrically driven laser; yellow arrows indicate laser feedback and output. c, Schematic top view; gray arrows indicate lateral paths of injected charges. d, Microscope image of the electrically driven laser. Credit: U. St. Andrews / Nature.
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