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1. Colloidal quantum dot light-emitting diodes (QD LEDs) have advantages such as color purity, structural diversity, tunable band gap, and low-cost solution processing for displays.

2. The electron-transporting layer (ETL) in QD LEDs is relatively understudied, with material systems primarily focused on inorganic metal oxides (ZnMgO, ZnO, and SnO2).

3. A bifunctional agent was developed to address the challenge of trap states in InP/ZnSe/ZnS core–shell QDs by including an electron-deficient backbone for electron mobility and electron-rich units to bind to Zn2+ to passivate surface traps. This resulted in the highest EQE among organic-ETL-based red InP LEDs.

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