Two Birds with One Stone: Impedance–Voltage Dual‐Mode Low Humidity Sensor Based on LiBr‐MOF‐801 with High Response

Abstract Dual‐mode humidity sensors have received wide attention in recent years due to their great potential in multifunction applications. Herein, following a “two birds with one stone” strategy, a dual‐mode and self‐powered low humidity sensor based on LiBr‐MOF‐801 with high response and power generation is proposed. The optimized LiBr‐MOF‐801‐based sensor exhibits impedance–voltage dual‐mode sensitivity in the low humidity range of 0–23% relative humidity (RH) with high response (57.1 and 0.61 V), small hysteresis (0.3% RH) and good long‐term stability at room temperature (20 °C). Moreover, an integrated humidity power generator is obtained by series connection of the self‐powered humidity sensor within 15 cm 2 , and the output voltage reaches 2.6 V with an output power density of 110 nW cm −2 , and can be used as energy, supplying power to commercial electronic equipment even in low humidity. This work provides a new sight for fabricating high‐performance, dual‐mode, and self‐powered low‐humidity sensors.