AI Article Synopsis
- SnO-based planar perovskite solar cells (PSCs) show promise for solar energy due to their simple design and cost efficiency, but their performance is limited by defects at the interface between the perovskite and SnO layers.
- A novel interfacial modifier, potassium salt of anthraquinone-1,8-disulfonate (ASPS), is introduced to enhance carrier transport and improve the upper perovskite light absorber layer, addressing the defects at the interface.
- Using ASPS leads to a substantial increase in power conversion efficiency from 21.36% to 23.96%, along with enhanced storage and thermal stability for the modified solar cells.
Article Abstract
SnO-based planar perovskite solar cells (PSCs) are considered as potential photovoltaic candidates due to their simple structures and cost-effective preparation processes. However, the extensive defects accumulated at the buried interface between perovskite and SnO greatly hinder the further improvement of PSC efficiency and stability. Herein, the potassium salt of anthraquinone-1,8-disulfonate (ASPS) is used as a novel multifunctional interfacial modifier to improve the carrier transport performance at the buried interface and optimize the quality of the upper perovskite light absorber layer (PVK) in PSCs. Owing to the synergistic effect of sulfonic acid groups, carbonyl groups and potassium ions in ASPS, the accumulated defects at the buried interface are passivated, the energy level arrangement of the interface is optimized, and the crystalline quality and optoelectronic properties of the PVK films are improved. As a result, the power conversion efficiency (PCE) improved significantly from 21.36% for the controlled device to 23.96% for the ASPS-modified device. Furthermore, the unencapsulated ASPS-modified device also exhibited better storage stability and thermal stability than the controlled device.
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| http://dx.doi.org/10.1039/d3cp00514c | DOI Listing |
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