Fig. 2: Spin relaxation time of BAI-based polymers at room temperature.
From: Halogenated-edge polymeric semiconductor for efficient spin transport
a Pulse sequence of ESR used to extract the spin-lattice and coherence times (top panel), and the spin evolution in Bloch spheres corresponding to above pulse sequence (bottom panel). I to VIII represent the evolution state after the action of different pulses. The green and orange sections represent the testing and evolution of spin relaxation times T1 and T2, respectively. b The inversion recovery curves measured in PBAI-V, P2ClBAI-V and PFClBAI-V thin films. Black lines are the fitted result according to the circular data points. The green, tan, and blue circular dots represent the experimental data collected by PBAI-V, P2ClBAI-V, and PFClBAI-V, respectively. c The spin relaxation time T1 extracted from (b). d Hahn-echo signal versus the free precession time Ï„ for PBAI-V, P2ClBAI-V and PFClBAI-V. Black lines are the fitted result according to the circular data points. The green, tan, and blue circular dots represent the experimental data collected by PBAI-V, P2ClBAI-V, and PFClBAI-V, respectively. e The spin relaxation time T2 extracted from (d). The error bars in (c) and (e) indicate that the data are collected from five measurements of the same sample.
