Corannulene, C20H10, also known as a buckybowl, is a curved polyaromatic hydrocarbon (PAH) often visualized as the hydrogen-terminated C20 cap of C60 (Figure ). The ground-breaking synthesis of corannulene by Lawton and Barth 2 stimulated a spate of investigations into its structural, electrochemical and photophysical properties. These include bowl-to-bowl inversion dynamics, a relative large dipole moment of 2.1 D, akin to that of pyridine (2.2 D), and a moderately deep LUMO of -2.65 eV, similar to that of terephthalonitrile (ca. -2.55 eV). As the availability of corannulene derivatives become more widely available, they have found use as components in energy storage devices, solar cells, organic field-effect transistors and biomedical applications. However, there are to date only a handful of reports describing the luminescent properties of corannulene-based compounds, despite the fact that more than 1000 publications have focused on corannulene since the first synthesis of corannulene was reported in 1966 (Figure ). Corannulene phosphorescence at 77 K had been observed and its radical anion characterized. While there is no question these seminal studies serve as the stepping stones to corannulene materials studies seen today there was a period 1971-91 where corannulene studies were few and mostly theoretical in scope. Scott's flash vacuum pyrolysis synthesis brought a resurgence to the field along with solution methods, which allowed substantially more to be investigated into the electroluminescence and photoluminescence of corannulene and derivatives. An early comparison of C70 and corannulene low-temperature phosphorescence (LTP) suggested multi-state emission, an uncommon "violation" of Kasha's rule. Previous reports demonstrate that mono-through pentakisacetylene-bridged derivatives revealed the high photoluminescence quantum yields, FPL, and various colors of corannulene fluorescence were possible. These ethynyl-and aryl-substituted corannulene derivatives are all fluorescent, thus are not adept at harvesting triplet excitons and so less relevant materials for electroluminescent devices. In 2018, Hatakeyama et al. reported a π-extended B2N2-embedded corannulene derivative (λPL=424 nm; ΦPL=69% in CH2Cl2) and the first reported example of a corannulene-based organic light-emitting diode (OLED), which showed a maximum external quantum efficiency (EQEmax) of 2.61%. A growing database of crystal structures of corannulene derivatives showed that quasi-columnar packings, also in polar space groups, were possible. Nonetheless, broad-scale screening of corannulene materials can now follow after the kilogram-scale synthesis of corannulene; as well as a robust set of multi-gram-scale procedures to prepare mono-, di-, tetra-and pentahalocorannulenes. Despite the increased interest in the development of corannulene derivatives, there are no examples of luminescent corannulene derivatives that harvest triplet excitons towards their emission such as via thermally activated delayed fluorescence (TADF) and room-temperature phosphorescence (RTP).