Abbreviations	Definition
PSP	Pressure-sensitive paint
PC-PSP	Polymer–ceramic pressure-sensitive paint
MP-PSP	Mesoporous-particle pressure-sensitive paint
PtTFPP	Platinum(II) meso-tetra(pentafluorophenyl)porphine
poly(IBM)	Poly(isobutyl methacrylate)
LED	Light-emitting diode
UV	Ultraviolet
RMSE	Root-mean-square error
Symbol	Definition
D(te)	Accumulated photodegradation ratio after an irradiation period (t_e)
E irr	Irradiance
E irr,ref	Reference irradiance
E a	Apparent activation energy
f	Initial contribution of the fast-decaying component
I(t)	Luminescence intensity at irradiation time (t)
I 0	Luminescence intensity at the beginning of irradiation
k 1	Fast degradation-rate constant
k 2	Slow degradation-rate constant
K D	Composite degradation-rate constant
K D,ref	Composite degradation-rate constant at the reference condition
K ox	Limiting oxygen-dependent photooxidation contribution
K pd	Oxygen-independent photodecomposition contribution
K q	Effective oxygen-quenching coefficient
m	Irradiance power-law exponent
p	Total absolute pressure
p ref	Reference total pressure
p O2	Oxygen partial pressure
p O2,ref	Reference oxygen partial pressure
p O2,1/2	Effective oxygen half-saturation pressure
R(t)	Normalized luminescence intensity
R g	Universal gas constant
R 2	Coefficient of determination
t	Irradiation time
t e	Irradiation duration used to evaluate accumulated degradation
T	Absolute temperature
T ref	Reference absolute temperature
x O2	Oxygen mole fraction
β ox	Ratio of the limiting photooxidation contribution to the photodecomposition contribution, Kox/Kpd
θ O2	Relative oxygen concentration term for photooxidation