Fig. 3: The 2D/3D Perovskite Heterostructure Approach to PeLEDs.
From: Grain engineering for efficient near-infrared perovskite light-emitting diodes
a Chemical structure of TeFBTT and single crystal structure of (TeFBTT)2PbI4. b Schematic representation of the TeFBTT-incorporated 2D/3D perovskite heterostructure. c GIWAXS pattern of a perovskite film with TeFBTT post-treatment. d EQEs of PeLEDs under different conditions (error bars indicate minimum and maximum EQEs). e EL spectra, light emission camera image (inset), f J–V–R curves, and g EQE characteristics of PeLEDs with solvent-engineered and TeFBTT-treated perovskite films. h Histograms depicting EQEmax of PeLEDs. i The LED stability test for the optimized TeFBTT-treated device under different current densities.
