Fig. 1: Efficient UCEL from a single H2Pc molecule.
From: Anomalously bright single-molecule upconversion electroluminescence
a Schematic of STM-induced single-molecule electroluminescence. Insets show the structure and STM image (−0.7 V, 2 pA) of H2Pc. b STML spectra acquired from H2Pc/3ML-NaCl/Au(111) at different bias (Vb): 1.5, 1.7, 2.0, –1.7 and –2.0 V. c Bias-dependent intensity integrated over the Qx peak. Inset: Differential conductance (dI/dV) curve of H2Pc, with the two peaks assigned to the HOMO and LUMO states. d Dependence of molecular emission intensities Iph on tunneling currents Ie at Vb = 1.7 and 2.0 V.
