Triboelectric　nanogenerator　(TENG)　has　attracted　enormous　interests　since　it　is　able　to　efficiently　convert　various　energies　into　electrical　energy　and　drive　low-power　personal　electronic　sensors.　However,　TENG　is　usually　restricted　to　harvest　mechanical　energy,　and　the　realization　of　TENG　with　the　ability　to　harvest　light　energy　is　rarely　reported.　In　this　work,　a　multifunctional　stretchable　TENG　using　polydimethylsiloxane/Mxenes　composites　as　triboelectric　layer　is　demonstrated,　which　is　able　to　simultaneously　harvest　mechanical　and　light　energy.　Beneficial　from　the　highly　electronegative　surface　and　intense　surface　plasmon　excitations　property　of　Mxenes,　our　TENGs　exhibit　high　mechanical　energy　conversion　efficiency　and　excellent　light　response　property.　Compared　to　the　device　without　illumination,　the　open-circuit　voltage　and　short-circuit　current　with　light　illumination　increased　from　145　to　453　V,　and　27　to　131　μA,　respectively,　and　the　instantaneous　light　power　conversion　efficiency　achieved　19.6%.　Meanwhile,　our　TENGs　are　demonstrated　to　detect　sound　instructions　and　wind　speed,　which　can　inspect　frequency,　amplitude,　and　speed　in　various　environments.　Furthermore,　TENG　actuated　color-tunable　LED　matrix　is　fabricated　to　develop　an　environmental　interaction　visualization　system.　This　work　greatly　expands　the　functionality　of　TENG　in　energy　harvesting,　and　provides　a　universal　strategy　for　simultaneously　harvesting　mechanical　and　light　energy　in　a　one-structure-layer-based　TENG.　©　2021　Elsevier　Ltd