Solar Cells Integrated With TriboElectric NanoGenerator Work When It Rains

Solar cells, as promising devices for converting light into electricity, have a dramatically reduced performance on rainy days Researchers from University of California  Los Angeles (UCLA) have built  an energy harvesting structure that integrates a solar cell and a triboelectric nanogenerator (TENG) device. Objective: to realize power generation from both sunlight and raindrops.

A heterojunction silicon (Si) solar cell is integrated with a TENG by a mutual electrode. Regarding the solar cell, imprinted PEDOT:PSS is used to reduce light reflection, which leads to an enhanced short-circuit current density. A single-electrode-mode water-drop TENG on the solar cell is built by combining imprinted polydimethylsiloxane (PDMS) as a triboelectric material combined with a PEDOT:PSS layer as an electrode. The increasing contact area between the imprinted PDMS and water drops greatly improves the output of the TENG.

The hybrid energy harvesting system integrated electrode configuration can combine the advantages of high current level of a solar cell and high voltage of a TENG device, promising an efficient approach to collect energy from the environment in different weather conditions.



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