Solar-Powered Supercapacitors Integrated with a Shared Electrode

Abstract

A solar-powered integrated supercapacitor (SPIS) with an inverted organic solar cell (iOSC) as the energy conversion unit and a supercapacitor (SC) as the energy-storage unit is a workable combination that yields a highly effective self-powered pack. However, the current designs of these elements are cumbersome and entail multistep fabricationtwo major application disadvantages. Herein, we report on a compact SPIS in series with a three-electrode configuration that uses modified graphene oxide-incorporated poly­(3,4-ethylenedioxythiophene)-poly­(styrenesulfonate) as the common electrode, which is particularly important to integrate the iOSC with the SC and simultaneously play a role in the charge collection, transfer, and storage. The SPIS is successfully constructed through a solution process under mild conditions. Under 1-sun illumination, the iOSC features a weight-specific power density as high as 6.46 W g–1, enabling the SC to be fully charged by the iOSC within 33 s to create a fusion SPIS able to reach ∼0.6 V. The as-developed SPIS has a thickness of only ∼2.6 μm, and the substrate is a high-performance candidate for portable and wearable electronic devices in the future.

Evaluation of the Passivation Effects of PEDOT:PSS on Inverted Perovskite Solar Cells

“…The surface environment of PEDOT:PSS is passivated by the polymers, and the polymers decrease the wettability of the perovskite films on the PEDOT:PSS surface, which can reduce the surface tension force and induce large grain sizes of perovskite. [66] The grain sizes of perovskite are related to the crystallinity and further influence the trap state densities at the GBs. [67,68] The increased grain sizes and decreased GBs of the perovskite films lead to improved charge transport, reduced charge recombination in the films, and enhanced performance of devices.…”

High‐Voltage Energy Harvesting and Storage System for Internet of Things Indoor Application

“…For this reason, we have decided to collect the main results of integrated devices including third‐generation solar cells and energy storage devices (batteries and supercapacitors) in terms of OPECSE versus voltage window ( Figure ). [ 14,19,30–53 ] Among the collected works, the ones characterized under simulated solar spectrum have been reported in black while the ones characterized under indoor light were reported in red. Different symbols were used instead to identify the photovoltaic and energy storage technologies employed.…”

Supercapacitors: Fabrication Challenges and Trends

“…Solar energy [48] is the main energy source for all plants and humans, with a major utilization of solar energy relying on photovoltaic technology; however, this process is unstable because solar radiation is intermittent and unstable [49], which can destroy the lifetime of solar cells and devices. Advanced approaches have been proposed using electric energy storage systems, where the integration of supercapacitors and solar cells [50] consisted of three parts, namely, dye-sensitized solar cells, perovskite solar cells, and organic solar cells. Overall, supercapacitors have shown the potential to be next-generation power sources [51], especially for providing power supply over a short amount of time and working as an energy buffer and integrating with other power storage systems.…”