Strategy of Voltage Match on the Maximum Power Point for a High-Efficiency Photorechargeable Device.

ACS Appl Mater Interfaces

State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, School of New Energy, North China Electric Power University, Beijing 102206, China.

Published: March 2023

A photorechargeable device can generate power from sunlight and store it in one device, which has a broad application prospect in the future. However, if the working state of the photovoltaic part in the photorechargeable device deviates from the maximum power point, its actual power conversion efficiency will reduce. The strategy of voltage match on the maximum power point is reported to achieve a high overall efficiency (η) of the photorechargeable device assembled by a passivated emitter and rear cell (PERC) solar cell and Ni-based asymmetric capacitors. According to matching the voltage of the maximum power point of the photovoltaic part, the charging characteristics of the energy storage part are adjusted to realize a high actual power conversion efficiency of the photovoltaic part (η). The η of a Ni(OH)-rGO-based photorechargeable device is 21.53%, and the η is up to 14.55%. This strategy can promote further practical application for the development of photorechargeable devices.

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http://dx.doi.org/10.1021/acsami.2c23046DOI Listing

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