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Experimental Determination of Atomic Scale Structure and Energy-Level Alignment of C on CsPbBr(001).
ACS Nano
March 2025
Solid State Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen 91058, Germany.
The efficiency and stability of perovskite solar cells are largely determined by the interfaces between different functional layers in the device. Here, we investigate the atomic scale structural and electronic properties of C on thin films of CsPbBr on Au(001) by scanning tunneling microscopy and spectroscopy (STM/STS). By varying the PbBr content of the film, we control the surface termination, switching between CsBr and PbBr, with each exhibiting distinct reconstructions.
View Article and Find Full Text PDFNon-fullerene electron-transporting materials for high-performance and stable perovskite solar cells.
Nat Mater
March 2025
Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), Shenzhen, China.
The electron-transporting material (ETM) is a key component of perovskite solar cells (PSCs) optimizing electron extraction from perovskite to cathode. Fullerenes, specifically C and [6,6]-phenyl-C-butyric acid methyl ester (PCBM), have been used as the benchmark ETMs for inverted PSCs. However, C is restricted to thermal evaporation, and PCBM suffers from poor photothermal stability and suboptimal electron transport, limiting their PSC applications.
View Article and Find Full Text PDFHighly stable inverted perovskite solar cells with all-inorganic selective contact using iron-doped zinc oxide.
J Chem Phys
March 2025
Jiangxi HAC General Semitech Co., Ltd, Jiujiang 332001, People's Republic of China.
Perovskite solar cells (PSCs) have achieved remarkable performance advancements over the past decade. In inverted p-i-n PSCs, commonly utilized electron transport layers (ETL), such as C60 and PCBM, are associated with notable stability challenges and high production costs. This study reports on a novel and highly stable perovskite solar cell that employs iron-doped zinc oxide (FZO) nanoparticles as the ETL and nickel oxide (NiOx) as the hole transport layer, demonstrating a power conversion efficiency (PCE) of ∼12%.
View Article and Find Full Text PDFImproved Efficiency and Stability in Inverted-Structure Solar Cells with Lead-Free All-Inorganic Halide Perovskite CsSnZnBr.
ACS Appl Mater Interfaces
February 2025
Department of Materials Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
We report the fabrication of an inverted structure solar cell with all-inorganic lead-free perovskite CsSnZnBr alloy thin films grown by physical vapor codeposition of CsBr, SnBr, and ZnBr. It was found that the deposited CsSnZnBr perovskite alloy thin films exhibited improved morphological characteristics (larger grain sizes, lower pinhole density, and improved flatness) compared to the CsSnBr thin film. The incorporation of 4% Zn (CsSnZnBr, abbreviated as 4Zn) resulted in a bandgap narrowing of ∼20 meV compared to CsSnBr with the upshift of the valence band maximum and conduction band minimum of ∼0.
View Article and Find Full Text PDFPreclinical Long-Term Stability and Forced Degradation Assessment of EPICERTIN, a Mucosal Healing Biotherapeutic for Inflammatory Bowel Disease.
Pharmaceutics
February 2025
Department of Pharmacology and Toxicology, School of Medicine, University of Louisville, Louisville, KY 40202, USA.
EPICERTIN, a biotherapeutic candidate for mucosal healing in inflammatory bowel disease (IBD) and other mucosal disorders, was subjected to an extensive long-term stability program to evaluate its molecular stability and physicochemical properties. Additionally, a forced degradation assessment was conducted to identify EPICERTIN's degradation products under various conditions, including thermal stress, pH variations, agitation, and oxidation. The stability of EPICERTIN drug substance (DS), formulated in phosphate-buffered saline (PBS) at 1 mg/mL and stored at 5 °C and 25 °C/60% relative humidity (RH), was monitored over a 2-year period, referencing relevant regulatory guidelines.
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