A Strategy of “Self-Isolated Enhanced Emission” to Achieve Highly Emissive Dual-State Emission for Organic Luminescent Materials

Graphical A self-isolated enhanced emission (SIEE) strategy through flexible alkyl chains is proposed to suppress and prevent the emission-quenched π–π stacking in aggregated solid states. As observed, remarkable emission efficiency with quantum yields up to 99.72 % in solution and 77.46 % in solids are achieved for DBBT-C8 (see figure). Currently, the commonly developed organic luminescent materials (OLMs) usually exhibit poor luminescent performance in aggregated solid states compared with their well-dissolved solution states, making it a tough goal to achieve the highly emissive dual-state emission. To overcome this limitation, a “self-isolated enhanced emission” (SIEE) strategy through flexible alkyl chains to suppress the emission-quenched π–π stacking in solids is proposed here and, based on this guideline, remarkable emission efficiency with photoluminescence quantum yields up to 99.72 % in solution and 77.46 % in the solid state are achieved for the SIEE constructed DBBT-C8, which is then successfully used in solid-state displays and data encryption.