VUV SiPMs for nEXO

The nEXO detector features a 5 tonne time projection chamber filled with liquid xenon enriched to 90% in the A=136 isotope. nEXO aims to detect neutrinoless double beta (0??ββ) decay) of ¹³⁶Xe with a 90% CL sensitivity = 1.35 x 10²⁸ years using vacuum ultraviolet (VUV) silicon photomultipliers (SiPMs) as scintillation sensors. This talk will focus on testing of the SiPM devices that are under consideration for use in nEXO. We present the characterization methods and results, highlighting the photon detection efficiency (PDE), single photoelectron (SPE) gain, temperature-dependent breakdown voltage, dark count rate, and correlated avalanche contribution.