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Bilateral Interface Engineering for Efficient and Stable Perovskite Solar Cells using Phenylethylammonium Iodide
摘要： Achieving high efficiency and long-term device stability is a vital issue for the commercialization of organic-inorganic hybrid perovskite solar cells (PeSCs). In this work, phenyl ethyl-ammonium iodide (PEAI)-induced bilateral interface engineering was developed to improve the device efficiency and stability of methylammonium lead triiodide (MAPbI3)-based PeSCs. Introducing PEAI onto poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) layer modifies the surface properties of the PEDOT:PSS and facilitates the formation of a high-quality perovskite active layer with enlarged grains on the PEDOT:PSS. The PEA+ in the PEAI-PEDOT:PSS also alters the work function of the PEDOT:PSS, leading to a reduction in the energy difference between the PEDOT:PSS and MAPbI3 perovskite layer, which decreases energy loss during charge transfer. Additionally, depositing PEAI onto three dimensional (3D) perovskite yields a two dimensional/three dimensional (2D/3D) stacked structure for the perovskite active layer. Because the two dimensional (2D) top layer acts as a capping layer to prevent water penetration, the stability of the perovskite active layer is significantly enhanced. A PeSC device fabricated based on this combination exhibits enhanced power conversion efficiency and extended device lifetime compared to a pristine PeSC. Under high-humidity conditions (75 ± 5%), the PEAI-treated PeSC retains 88% of its initial power conversion efficiency (PCE) after 100 h. In contrast, a pristine PeSC device loses over 99% of its initial PCE after only 25 h under the same conditions.
关键词： high efficiency,perovskite solar cells,bilateral interface engineering,PEAI,long-term stability
更新于2025-09-23 15:21:01
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Evaluating the role of phenethylamine iodide as a novel anti-solvent for enhancing performance of inverted planar perovskite solar cells
摘要： Inverted perovskite solar cells (PSCs) have attracted much interest due to their improved operational stability in the past few years. However, despite the recent advances of their performance, they still suffer from low power conversion efficiencies with a reduced open-circuit voltage (Voc), as compared to PSCs with a regular structure, due to the presence of defect states. In this work, a promising and more effective strategy than the typical post-treatment passivation method is demonstrated for the decrease of nonradiative recombination in quadruple-cation RbCsMAFA inverted PSCs, through the employment of phenethylammonium iodide in the anti-solvent deposition step during the perovskite formation. As a result, a Voc value as high as 1.17 V is achieved, while control devices (where the typical chlorobenzene anti-solvent was used) exhibited a significantly lower Voc of 1.09 V. Additionally, the devices exhibited high moisture stability by maintaining nearly 80% of their initial efficiency for over 500 h exposure in ambient conditions.
关键词： efficiency,nonradiative recombination,perovskite solar cells,passivation,PEAI
更新于2025-09-23 15:19:57
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High efficiency and stability of inverted perovskite solar cells using phenethyl ammonium iodide modified interface of NiOx and perovskite layers
摘要： The hole transport layer NiOx based inverted perovskite solar cells (PSCs) have advantages of simple fabrication, low temperature and low cost. Furthermore, p-type NiOx material compared to typical n-type SnOX for PSCs has better photo-stability potential due to its lower photocatalysis ability. However, some typical materials modified NiOx layer show relatively simple functions which limit the synthesized performance of NiOx based inverted PSCs. The phenethyl ammonium iodide (PEAI) was introduced to modify NiOx/perovskite interface, which can synchronously contribute to better crystallinity and stability of perovskite layer, passivating interface defects, formed quasi-2D PEA2PbI4 perovskite layer and superior interface contact properties. The PCEs of PSCs with PEAI modified the interface of NiOx/perovskite layer was obviously increased from 20.31 % from 16.54 % of the reference PSCs. The PSCs with PEAI modification remained 75% and 72% of the original PCE values aging for 10 h at 85 °C and 65 days in relative humidity of 15%, which are superior to that (47% and 51%) of the original PCE values for the reference PSCs, respectively. Therefore, PSCs with PEAI modified NiOx/perovskite interface show higher PCEs and better thermal stability and moisture resistance.
关键词： Nickel Oxide,Perovskite Solar cells,quasi-2D,Stability,PEAI
更新于2025-09-12 10:27:22