Ultrafast Electron Transfer in Binary Nanoparticle Superlattices under High Pressure

The interparticle spacing of a heterostructure is a crucial factor affecting electron transfer (ET) process. Herein, binary nanoparticle superlattices (BNSLs) composed of CdSe/ZnS quantum dots (QDs) and Au nanoclusters (NCs) are prepared. Steady‐state and time‐resolved spectra illustrate that the ET accelerates as the pressure increases because pressure effectively adjusts the interparticle spacing. The results also demonstrate that the trap state of the CdSe/ZnS QDs affects the ET process of BNSLs. Binary nanoparticle superlattices (BNSLs) are loaded in a diamond anvil cell (DAC). Then, different technologies are used to explore the electron transfer (ET) process in the BNSLs. The results indicate that ET accelerates as the pressure increases due to the decreased interparticle spacing. Specifically, the change in the samples’ trap states affects the ET process under different pressures.