Size- and Composition-Dependent Exciton Spin Relaxation in Lead Halide Perovskite Quantum Dots

The strong spin–orbital coupling in lead halide perovskites allows for facile spin injection for spintronics applications, but on the other hand, it also limits the lifetime of the injected spins. Full-dimensional confinement of the carriers using quantum dots (QDs) has been envisioned as an effective means to prolong the spin relaxation lifetime and has been explored for II–VI and III–V group QDs. Here we applied this idea to colloidal lead...