https://scholars.lib.ntu.edu.tw/handle/123456789/577041
標題: | The dominant role of memory-based capacitive hysteretic currents in operation of photovoltaic perovskites | 作者: | Hern?ndez-Balaguera E Romero B Arredondo B del Pozo G Najafi M Galagan Y. YULIA GALAGAN |
關鍵字: | Calculations; Hysteresis; Perovskite; Active Layer; Capacitive effect; Electrical analysis; Fractional calculus; Hysteresis phenomenon; Measurements of; Photovoltaic; Transient dynamics; Perovskite solar cells | 公開日期: | 2020 | 卷: | 78 | 來源出版物: | Nano Energy | 摘要: | The potential opportunities of perovskite-based technology to further advance in the photovoltaic field and implement an extensive industrial application, will mainly depend on whether some of its weaknesses, such as current density-voltage (J?V) hysteresis, can be overcome. In this sense, a critical aspect is the understanding and the subsequent accurate description of hysteresis in perovskite cells. Here, we present the theoretical underpinnings to interpret non-ideal transient dynamics in stepwise-JV measurements, using electrical analysis strategies and fractional calculus tools. Our model was validated with experimental measurements of CsFAPbIBr-based photovoltaic perovskites of different active layer thicknesses with persistent long-range time photocurrents. It is reported that hysteresis phenomena increase with more pronounced non-ideal capacitive effects suggesting that more trapping events limit ion motion and carrier transport. Our main interest is to provide valuable information about the memory-based slow timescale dynamics, which exhibits a significant impact on the appearance of hysteresis and, to a large extent, on the operation of the solar cell. ? 2020 Elsevier Ltd |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85091734659&doi=10.1016%2fj.nanoen.2020.105398&partnerID=40&md5=ce1352d94f6bb03df8795bf75f0fe814 https://scholars.lib.ntu.edu.tw/handle/123456789/577041 |
ISSN: | 22112855 | DOI: | 10.1016/j.nanoen.2020.105398 |
顯示於: | 環境工程學研究所 |
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