Abstract
A cyano-substituted styrene derivative is synthesized and successfully prepared to lamellate single crystals through precisely controlling the crystal growth conditions. The lamellate single crystals with regular edge and smooth surface display intrinsically ordered stacking and high quality, all of which are of importance for high optoelectronic performance. The single-component light-emitting transistors based on the lamellate crystals offer striking device performance in terms of record external quantum efficiency of 2.02%, exceeding the benchmark value in this field. Such organic light-emitting single crystals provide a versatile platform for designing and engineering their structures and optoelectronic properties toward light-emitting devices.
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