Investor Presentaiton

Milestone #2 (achieved recently): QE maps of K₂CsSb through graphene coating 17μm Quantum efficiency (%) map through graphene 2-layer Gr, 3eV (405 nm) 0.25 Photocathode material hv e- 0000 0.20 0.15 0.10 20 μm 7.5 μm 0.05 Graphene 2-layer Gr, 4.4 eV (280 nm) substrate Mesh grid 3-layer Gr, 3eV (405 nm) 0.6 0.25 0.5 0.20 First ever QE of bialkali photocathodes 0.4 0.15 through graphene 0.3 coating demonstrated 0.10 0.2 500 μm 20 μm 0.1 Los Alamos NATIONAL LABORATORY 0.053/2021 9 Submitted

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