Lead Halide Perovskites: Uncovering the Electron‐Phonon Interplay and Dynamical Energy‐Dissipation Mechanisms of Hot Carriers in Hybrid Lead Halide Perovskites (Adv. Energy Mater. 9/2021)

Abstract

In article number 2003071, Kam Sing Wong and co‐workers quantify electron‐phonon coupling strength using a simplified two‐temperature model in several hybrid lead halide perovskites. Also, the intricate competition of hot‐carrier cooling mechanisms between large polaron screening and hot‐phonon bottleneck effect are described by unveiling an S‐shaped temperature versus carrier density relationship. The findings are expected to help shed light on hot‐carrier harvesting in high‐performance photovoltaic applications.

Advanced Laser Nanofabrication Technologies for Perovskite Photonics

“…Chan et.al. reported the following values of the electron-phonon coupling coefficients for organic-inorganic perovskites: Γ e-ph (MAPbI 3 ) ≈ 1.52 • 10 10 W cm −3 K; Γ e-ph (MAPbBr 3 ) ≈ 1.46 × 10 10 W cm 3 K; Γ e-ph (FAPbBr 3 ) ≈ 8.94 × 10 10 W cm −3 K. [207] The obtained values are of the order of those reported for metals, indicating similar efficiency and characteristic timescale for lattice thermalization for metals and perovskites, while the latter material demonstrates several orders of magnitude lower thermal conductivity (𝜅 = 𝜒/) ensuring efficient heat localization within the laser focal spot.…”