Optical and Thermal Effect of Boron Nitride Nanoplate Additive on Quantum Dot-Converted Light-Emitting Diodes

Quantum dot-converted light-emitting diodes (Qc-LEDs) have attracted significant interest due to their superior color performance in advanced lighting and display applications. Despite this, their efficiency is often compromised by heat-induced fluorescence quenching of quantum dots (QDs). Boron nitride nanoplates (BNPs) are known for their excellent heat dissipation properties, making them a promising additive to reduce heat accumulation in Qc-LEDs. However, BNPs also possess high light reflectivity that traps light within the device, diminishing their overall effectiveness. In this study, we explore the comprehensive optical and thermal impacts of BNPs on Qc-LEDs through simulations and experiments. Results show that 1 wt% BNPs strike a suitable balance, reducing temperature without significantly affecting light extraction efficiency. In contrast, 3 wt% BNPs lower the operating temperature of Qc-LEDs from $95.3~^{\circ }$ C to $65.9~^{\circ }$ C at 150 mA but also decrease light intensity by 22% compared to Qc-LEDs with 1 wt% BNPs. This research provides valuable insights for optimizing Qc-LED performance using BNPs and other thermally conductive 2-D nanoadditives.