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This review article surveys the organic small molecular materials, light‐emitting for most of them, being studied for the molecular alignment or orientation in thin films. Following a chronicle order, three practical characterization techniques, variable angle spectroscopic ellipsometry (VASE), angle‐dependent photoluminescence (ADPL), and grazing incidence wide‐angle x‐ray scattering (GIWAXS) have been used to probe phosphorescence, thermally activated delayed fluorescence (TADF) materials, as well as those of non‐phosphorescence and non‐TADF materials. [ABSTRACT FROM AUTHOR]

This review article surveys the hybrid white organic light‐emitting diodes (WOLEDs) based on phosphorescent platinum complexes and fluorescence blue emitters developed in the last 20 years. Emission, either photoluminescence (PL) or electroluminescence (EL), properties of the materials, and the evolution of the configuration of devices in achieving the high performance WOLEDs are elaborated in the article. [ABSTRACT FROM AUTHOR]