摘要
The stability and efficiency of tin perovskite solar cells (TPSCs) are often decreasing with high-density defects occurring at the grain boundaries of the perovskite film and the heterojunction interfaces of hole-transport material (HTM) and poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS). Hence, this study addresses these challenges using nickel (II) meso amino octaethylporphyrin (NiNH2 OEP) as an effective defect-passivating agent for the device fabricated through a two-step method with an inverted device architecture. The precursor solution contains NiNH2 OEP porphyrin coating over PEDOT:PSS, where NiNH2 OEP is self-assembled uniformly at the perovskite grain boundary and interface between perovskite and HTM. NiNH2 OEP is protonated to form nickel (II) ammonium porphyrin ions (NiNH3+ OEP) to retard nonradiative charge recombination and inhibit ion migration that occurred through the high-density defect states to improve device stability and performance. Consequently, the TPSC device fabricated with NiNH2 OEP unveils a remarkable power conversion efficiency of 9.6%. Moreover, the stability of the device shows a prominent improvement that maintains an initial efficiency of 90% for more than 6,000 h inside the glove box.
原文 | English |
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文章編號 | 2301084 |
期刊 | Solar RRL |
卷 | 8 |
發行號 | 8 |
DOIs | |
出版狀態 | Published - 4月 2024 |