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Self-assembled organic-inorganic [C 6 H 14 N]PbI 3 crystals were synthesized. The crystal structure consists of one-dimensional semiconductor chains formed by infinite PbI 6 face-sharing octahedra aligned along the a-axis. The organic cations are linked to the inorganic chains by N-H· · ·I hydrogen bonds and act as insulator barriers. The vibrational properties of [C 6 H 14 N]PbI 3 were studied using polarized Raman scattering and infrared (IR) absorption. The observed Raman and IR spectral features were identified by comparison with the vibrational properties of homologous compounds and with the vibrational wavenumbers calculated using the ab initio PM3 method. Moreover, the photoluminescence and diffuse reflectance of [C 6 H 14 N]PbI 3 single crystals, along with the UV-Vis absorption of spin-coated films, were measured. A strong green-blue luminescence due to radiative recombinations of 1D excitons is observed. The Stokes shift is estimated at 70 meV.

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Key indicatorsSingle-crystal X-ray study T = 293 K Mean (C-C) = 0.027 Å R factor = 0.055 wR factor = 0.152 Data-to-parameter ratio = 31.1For details of how these key indicators were automatically derived from the article, see

Under sub-gap excitation, the materials exhibit white light emission (WLE) that originates from the STE within CdBr4 and the organic phosphorescence (for CdACP) and fluorescence (for CdODA). Under excitation above the gap the WLE is purely organic.