32‐2: Distinguished Student Paper: Quantum Dot/Siloxane Composite Film Exceptionally Stable Against Heat and Moisture

Abstract

We report the siloxane‐encapsulated quantum dot (QD) film (QD/siloxane film), whose photoluminescence (PL) quantum yield (QY) remains nearly undegraded under harsh heat or moisture conditions; 85°C/5% relative humidity (RH) and 85°C/85% RH for over 1 month.

Organic Polymer Hosts for Triplet–Triplet Annihilation Upconversion Systems

“…Some studies have already been conducted on TTA-UC systems using semiconducting inorganic nanoparticles that can act as a sensitizer with an organic substrate grafted to the particle acting as an emitter. ,, Inorganic materials usually provide more mechanical structure and an improved barrier to oxygen for the system and are often more photostable, while the presence of a grafted organic polymer maintains the processability of lightweight polymeric materials . There are many materials that show great promise to be developed into TTA-UC host systems. , One such example was reported by Kim et al, who developed a quantum dot/siloxane composite film, which is exceptionally stable against heat and moisture . The film showed excellent dispersion of the nanocrystals and favorable mechanical properties and could be potentially used to load chromophores, which could be encapsulated in the matrix by the high degree of siloxane bond formations and cross-linked bonding.…”

“…The film showed excellent dispersion of the nanocrystals and favorable mechanical properties and could be potentially used to load chromophores, which could be encapsulated in the matrix by the high degree of siloxane bond formations and cross-linked bonding. It is optically clear and resistant to the rigors of the atmosphere, making it ideal for solar applications …”

P‐93: Compact Stable Quantum Dots via Amide‐Mediated Synthesis of PMO‐Based Multifunctional Ligand

“…This composite sheet is then coated on LEDs to achieve desired light performance [1-3, 13, 14] . However, up to now a major barrier toward the widespread use of QDs has been the presence of a trade-off among three desirable QD properties for LEDs: high QY, uniform size, and high stability (both over time and in a harsh environment), in particular, the abscission of QDs' outer ligands, and the deterioration of QDs by permeate oxygen and moisture [14][15][16][17][18] . Such a problem is commonly found in hightemperature processes of LED packaging (e.g.…”