Thermal Stability Optimization for Full-Color Micro-LEDs With QDs and SU-8 Patterns

Quantum dots (QDs) serve as high-performance nanoscale color conversion materials, offering remarkable advantages for full-color micro-light-emitting diode (Micro-LED) displays. However, two critical challenges hinder practical applications: the integration of high-resolution patterned QDs with Micro-LED and the preservation of thermal stability under operational conditions. By the sidewall repair process, the Micro-LED devices can maintain approximately 75% of their performance when the temperature increased from 20<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$~^{\circ }$</tex-math> </inline-formula>C to 100<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$~^{\circ }$</tex-math> </inline-formula>C. Additionally, a systematic investigation into the effect of SU-8 on the luminescent properties demonstrated that integrating QDs with SU-8 offers a promising approach to achieve efficient color conversion without altering electrical performance. These advantages in temperature stability and overall performance also provide critical insights for developing full-color Micro-LED displays.