Organic-inorganic hybrid perovskite solar cells (PSCs) have achieved remarkable progress in power conversion efficiency, surpassing 26% in laboratory-scale devices. However, long-term operational stability under continuous illumination and thermal stress remains a major barrier to commercialization. This study reports a high-performance perovskite solar cell architecture employing a dual-layered hole transport material (HTM) system designed to simultaneously enhance charge extraction and device durability. The structure consists of a thin layer of poly[bis(4-phenyl)(phenylamino)]-stilbene (TFB) deposited via spin-coating as the primary HTM, followed by a compact, highly conductive layer of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) formed through a solution-processing method. The TFB layer ensures excellent energy level alignment with the perovskite absorber, minimizing interfacial energy barriers and enabling efficient hole transfer. Meanwhile, PEDOT:PSS acts as a robust secondary transport layer with superior conductivity and moisture resistance, effectively protecting the underlying perovskite from degradation caused by ambient humidity and oxygen.Bovine Serum Albumin Antibody Data Sheet The synergistic combination of these two materials results in a significant reduction in series resistance and improved fill factor (FF), reaching up to 81.5%. Devices fabricated with this dual-HTM configuration exhibit a certified power conversion efficiency (PCE) of 23.MCL-1 Antibody Biological Activity 4%, among the highest reported for planar PSCs without complex additives or encapsulation.PMID:35118990 Furthermore, the devices demonstrate exceptional stability: after 1,000 hours of continuous operation under maximum power point tracking at 25 °C in ambient air, they retain over 90% of their initial performance, outperforming conventional single-layer HTMs by more than 50%. In addition, the devices show negligible degradation when stored in dark conditions for 600 hours at 85 °C, indicating strong thermal resilience. X-ray diffraction and scanning electron microscopy confirm that the perovskite film maintains its crystallinity and morphology throughout aging. Electrochemical impedance spectroscopy reveals suppressed interfacial recombination and enhanced charge collection efficiency. These findings highlight the effectiveness of rational multi-functional layer design in addressing both efficiency and stability challenges in perovskite photovoltaics. The dual-layer HTM strategy provides a simple, scalable, and industrially viable pathway toward next-generation solar cells with high performance and long-term reliability.MedChemExpress (MCE) offers a wide range of high-quality research chemicals and biochemicals (novel life-science reagents, reference compounds and natural compounds) for scientific use. We have professionally experienced and friendly staff to meet your needs. We are a competent and trustworthy partner for your research and scientific projects.Related websites: https://www.medchemexpress.com