Robust perovskite-based triboelectric nanogenerator enhanced by broadband light and interface engineering

Triboelectric nanogenerators (TENGs) are a widely researched type of energy harvester suited to powering mobile micro-electronic devices. In this study, we present a hybrid MAPbI x Cl 3-x perovskite-based triboelectric nanogenerator (P-TENG) based on the coupling of triboelectric and photoelectric conversion mechanisms for simultaneous vibrating energy and solar energy harvesting. By optimizing the device structure, for the first time, planar TiO 2 as electron transport layer (ETL) and ultrathin pentacene as hole transport layer (HTL) are combined together to photoenhance the output of a TENG. Experimental results reveal that P-TENG has achieved the optimal photoinduced enhancement due to the most effective charge separation that relies on the joint of HTL and ETL. As a result, the optimized P-TENG with ~ 0.7 cm 2 effective area, the open-circuit voltage ( V oc ), short-circuit current ( I sc ) and the maximum transfer charge amount ( Q sc ) are increased by 55.7%, 50.8% and 58.2% upon illumination, respectively. Besides, the P-TENG shows fast response on both the full-spectrum simulated sunlight and monochromatic light extending from ultraviolet to entire visible region which enhances the potential application in photodetection. Our work presents a route to designing high-performance P-TENG via interfacial engineering to further boost the output ability of this photoelectric hybrid TENG.