Impact of Functional Fluorinated Porphyrins on the Efficiency and Stability of Perovskite Solar Cells
Journal
Small
Journal Volume
21
Journal Issue
10
ISSN
1613-6810
1613-6829
Date Issued
2025-01-19
Author(s)
Chi‐Lun Mai
Chieh‐Ming Hung
Zhen‐Hao Huang
Bo‐Han Chen
Meng‐Chuan Wang
Fang‐Chi Ho
Hsiao‐Chun Tsai
Zong‐Han Liu
Shang‐Da Yang
Hsieh-Chih Chen
Chen‐Yu Yeh
Abstract
Additives play a pivotal role in enhancing the efficiency of perovskite solar cells (PSCs), and carefully designed additives contribute to major breakthroughs in device performance. In this study, a series of novel A–π–A-type porphyrin derivatives—PPH-1, PPH-2, and PPF-1—are synthesized, each incorporating pyridyl groups, specifically engineered to function as passivation agents for PSCs. The electron-withdrawing properties of fluorine in PPF-1 increase the molecular polarity, thereby strengthening its interaction with the perovskite and enhancing the passivation efficacy. Compared to PPH-1 and PPH-2, PPF-1 not only improves crystallinity but also provides more efficient defect passivation at grain boundaries and interfaces. As a result, PSCs incorporating PPF-1 achieve a remarkable power conversion efficiency (PCE) of 24.96%, along with an open-circuit voltage (VOC) of 1.178 V, a short-circuit current density (JSC) of 24.65 mA cm−2, and a fill factor (FF) of 85.96%, surpassing the PCEs of 23.36%, 24.11%, and 23.93% for pristine, PPH-1-, and PPH-2-modified PSCs, respectively. In addition, the incorporation of fluorinated porphyrin in PPF-1 significantly improves the moisture resistance and thermal stability, while the device maintains high solar efficiency, opening up new alternative ways to promote solar cell innovation.
Publisher
Wiley
Type
journal article