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Organic semiconductor molecules possess chemical tunability and large stimulated emission cross section, representing a promising candidate for laser gain medium. However, for the pursuit of telecom‐wavelength organic lasers, one of the major obstacles is the lack of effective energy‐level systems with high optical gain to compensate the exciton deactivation losses. Herein, the effects of molecular...
Organic gain materials, with the merit of abundant excited‐state processes with large stimulated emission cross‐section, show considerable potential in lasers. The abundant excited‐state processes provide excellent platform for the construction of various forms of energy‐level systems, based on which the efficient population inversion and the tailorable gain region are supported. Herein, the development...