Spin Lifetime in Hybrid Organic–Inorganic Perovskites: Mechanisms, Measurements, and Prospects for Spintronic Applications

Hybrid organic–inorganic perovskites (HOIPs) have gained great attention in spintronics for their promising spin-optoelectronic properties, unique crystal structure, and ease of spin–orbital coupling modification. A crucial aspect of spintronics is the spin lifetime, which ensures spin coherence and device functionality. Although many studies have investigated spin lifetime in HOIPs, the underlying mechanisms governing spin dynamics in HOIPs remain ambiguous, with reported lifetimes ranging from 0.2 ps to 2 ns. This Mini-Review summarizes spin lifetimes in HOIPs measured by various techniques and explores the mechanisms behind spin decoherence. Both optical and electrical methods for measuring spin lifetime in HOIPs are discussed in detail. Furthermore, we compare the spin lifetimes of HOIPs with those of nitrogen-vacancy centers and organic semiconductors and address the unique challenges involved in improving spin coherence in HOIPs. We aim to provide insights and future research directions for optimizing HOIPs in spintronic devices.