Oct 2026· Journal of Physical Chemistry Letters· Vol 17 41, pp.
11971-11980
· 0 citations· 41 references
Medicine
Abstract
Widely used as hole transport layers (HTLs) for inverted perovskite solar cells (PSCs), the functions of phosphonic acid-based self-assembly monolayer (SAM) molecules in the bulk of the perovskite film have been studied in a limited manner but are essential. In this work, we designed a phenylammonium-functionalized SAM molecule termed 4PACD to study its effect on the perovskite crystal growth and the interfacial defect state passivation in the bulk of the perovskite film, depending on the molecule-extrusion process. By means of in situ photoluminescence, a slower crystal growth pathway was evidenced for 4PACD-incorporated perovskite film with much improved quality, which cuts down the defect density by nearly one order. Finally, the incorporation of 4PACD resulted in a champion device power conversion efficiency (PCE) of 26.78% compared with 25.01% for the control device with 4PACD as the HTL. The target device can reserve 98.9% of the initial PCE after 1000 h of light soaking, while the control retained 88.7%. This work highlights the perovskite growth advantage of the SAM incorporated in the bulk of the perovskite film over using it only as HTL, demonstrating the great potential of the molecule-extrusion process for high-performance PSCs without predepositing HTLs.
The perovskite layer is the core component of perovskite solar cells (PSCs), and the quality of the perovskite film critically impacts the performance of PSCs. Interfacial contact optimization, defect passivation, and energy level alignment regulation are effective approaches to fabricate high-performance PSCs. Herein,...
Meng-Yang Feng, Bin-Bin Wang, Shi-Long He et al.· Physical Chemistry, Chemical...· 0 citations
The crystallization quality and defect density of perovskite films are key factors determining the performance and lifetime of perovskite solar cells (PSCs). Moreover, covalent organic frameworks (COFs) have emerged as highly promising multifunctional passivators for PSCs due to their abundant functional groups, period...
Tian-Hong Huang, Yu Yuan, Zhi-Hui Chen et al.· Advances in Materials· 0 citations
Perovskite solar cells (PSCs) have reached power conversion efficiencies (PCEs) over 27%, yet further improvements in stability remain critical. Surface passivation is an effective strategy to reduce defects and enhance device durability. Inorganic passivation, in particular, offers stronger chemical bonding and de...
Jia-Hui Shen, Ke Zhao, Dong-Er Jin et al.· Chinese journal of chemistry· 0 citations
Perovskite/silicon tandem solar cells (PSTSCs) are among the most promising photovoltaic technologies for surpassing the efficiency limits of single-junction solar cells. A major breakthrough in this field has been the introduction of ultrathin hole-selective self-assembled monolayers (HS-SAMs). These molecular interfa...
I. Hajimiri, Hashem Shahroosvand, S. Bellani et al.· Chemical Society Reviews· 0 citations
The performance of self-assembled monolayers (SAMs) in perovskite solar cells (PSCs) is frequently hindered by molecular aggregation, poor interfacial wettability, and high buried-interface defect density. Herein, we introduce 4-carboxyphenylboronic acid (CPBA) as a multifunctional molecular bridge to synergistically e...
The inevitable photothermal‐induced desorption of functional molecules at the perovskite film surface would resurge the passivated surface defect states and cause severe recombination, thereby affecting both photovoltaic performance and stability of perovskite solar cells (PSCs). Here, we report a synergistic bimolecul...
Si-Yuan Tang, Song-Yang Yuan, Qin Tan et al.· Advanced Functional Material...· 0 citations
We use cookies to run the site and, with your consent, for analytics and to show ads.
See our Cookie Policy.
