Some of these things are luminophore specific and solvent specific. Generally it depends on the structure of the luminophore. Some molecules are known to undergo changes in geometry near phase transition temperature. For example near the phase transition temperature, there is huge increase in viscosity and molecular rotors get locked in a unique conformation, consequently leading to decrease in the non-radiative rate (knr). This increases the fluorescence lifetime and hence the quantum yield. But for phosphorescent molecules, there are chances that they may start showing fluorescence.

You can look at my paper (link given below) where I have looked at Alq3, Znq2, Nile red fluorescence lifetimes in ethanol all the way from 298K to 77K way below the phase transition temperature of ethanol.

https://www.researchgate.net/publication/237759229_Anomalous_fluorescence_in_supercooled_organic_liquids_Correlation_with_glassphase_transition?ev=prf_high

Article Anomalous fluorescence in supercooled organic liquids: Corre...

Without any specific purposes it does not make sense to investigate the effect of temperature on the fluorescence decay time of the molecules in solution, which cracked during cooling. Studies are usually carried out in glass-forming alcohols. The most convenient of them is isobutyl alcohol. The phenomenon of temperature quenching fluorescence is well-studied in the literature. For states with charge transfer states it is controlled by the orientation dynamics of solvent molecules (say, for such solutes as phthalimides). Other nature of fluorescence quenching takes place for non-polar organic compounds, such as anthracene derivatives.  If you read in Russian, I recommend you my book: “Photoprocesses in biomolecules carbon nanoparticles and polymer solar cells” 2016.

Data: TABLE OF CONTENTS VS Pavlovich 2016 Photoprocesses in biomolecules carbon nanoparticles and polymer solar cells

Article: Radiationless deactivation of theS 1-state of 9,10-dichloro- and 9,10-dibromoanthracene in solutions

Vladimir S. Pavlovich

Full-text available · Article · Mar 1995 · Journal of Applied Spectroscop

Article: Reasons for the dependence of the decay and quantum yield of the fluorescence of polar compounds on the viscosity and temperature of the solution

V. S. Pavlovich · S. V. Zablotskii · L. G. Pikulik

Article · Jun 1989 · Journal of Applied Spectroscopy

All liquids don't crack at low temperatures. Some liquids form glasses, some liquids tend to crystallize, while some other liquids like ethanol they go into supercool regime without crystallizing below the freezing point. Ethanol has a very interesting phase diagram.

At low temperatures, there are solubility issues, viscosity changes, polarity changes and these directly effect the photophysics of the molecule. Typically changes in fluorescence lifetimes, quantum yields, lambda max etc occur.

By the way, the solvent polarity effect on the fluorescence lifetime of 2-hydroxy-substituted Nile red is well described by my theory that is presented in my book (“Photoprocesses in biomolecules carbon nanoparticles and polymer solar cells” 2016) as well as in the minireview:

https://www.researchgate.net/publication/233395978_Solvatochromism_and_Nonradiative_Decay_of_Intramolecular_Charge-Transfer_Excited_States_Bands-of-Energy_Model_Thermodynamics_and_Self-Organization?ev=prf_pub

Article Solvatochromism and Nonradiative Decay of Intramolecular Cha...

Such studies are important in understanding the phase diagram of the solvent (there are other techniques as well) and also the behavior of the solute (fluorophore photophysics) in such conditions.