- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Synthesis of Highly-Oriented Black CsPbI <sub/>3</sub> Microstructures for High-Performance Solar Cells
摘要： Synthesis of a thin layer of perovskite with less pinholes and defects is vital for the construction of a high-performance perovskite solar cell (PSC). We report on an oriented attachment strategy to fabricate a black phase CsPbI3 highly-oriented quasi-single-crystalline microstructures film for constructing a mesoporous PSC device with enhanced power conversion efficiency, from 13.4% to 16.0%. The theoretical calculations and detailed in/ex situ characterizations demonstrate that the oriented attachment is driven by the predominant adsorption of dimethyl sulfoxide (DMSO) on the {212} facets of the yellow phase δ-CsPbI3 crystals which initially form a relatively oriented structure followed by phase transition to α-CsPbI3 crystals and merging into large highly-oriented quasi-single-crystalline microstructures film with {200} planes exposed under annealing. Our work demonstrates that the oriented attachment strategy enables the formation of highly-oriented quasi-single-crystalline perovskite microstructures films which are essential for realizing high-efficiency and stable thin film PSCs.
关键词： oriented attachment,DMSO,CsPbI3,perovskite solar cells,high-performance
更新于2025-09-23 15:21:01
-
Optimizing Lignosulfonic Acid-Grafted Polyaniline as a Hole-Transport Layer for Inverted CH <sub/>3</sub> NH <sub/>3</sub> PbI <sub/>3</sub> Perovskite Solar Cells
摘要： A conducting polymer of lignosulfonic acid-grafted, polyaniline-doped camphorsulfonic acid (LS-PANI-CSA), created via a low-temperature solution process, has been explored as an efficient hole-transport layer (HTL) for inverted single cation?anion CH3NH3PbI3 perovskite solar cells. The performance of the solar cell was optimized in this study by tuning the morphology and work function of LS-PANI-CSA films using dimethylsulfoxide (DMSO) as a solvent in treatment. Results showed that DMSO washing enhanced the electronic properties of the LS-PANI-CSA film and increased its hydrophobicity, which is very important for perovskite growth. The perovskite active layer deposited onto the DMSO-treated LS-PANI-CSA layer had higher crystallinity with large grain sizes (>5 μm), more uniform and complete surface coverage, and very low pinhole density and PbI2 residues compared to untreated LS-PANI-CSA. These enhancements result in higher device performance and stability. Using DMSO-treated LS-PANI-CSA as an HTL at 15 nm of thickness, a maximum 10.8% power conversion efficiency was obtained in ITO/LS-PANI-CSA/MAPbI3/PCBM/BCP/Ag inverted-device configurations. This was a significant improvement compared to 5.18% for devices based on untreated LS-PANI-CSA and a slight improvement over PEDOT:PSS-based devices with 9.48%. Furthermore, the perovskite based on treated LS-PANI-CSA showed the higher stability compared to both untreated LS-PANI-CSA and PEDOT:PSS HTL-based devices.
关键词： stability,hole-transport layer,hydrophobicity,perovskite solar cells,device performance,work function,lignosulfonic acid-grafted polyaniline,DMSO treatment,conducting polymer
更新于2025-09-16 10:30:52
-
Near 5% DMSO is the best: A structural investigation of PEDOT: PSS thin films with strong emphasis on surface and interface for hybrid solar cell
摘要： Effect of dimethyl sulfoxide (DMSO) doping on poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) thin films have been optimized for obtaining better hole transport layer in hybrid solar cell. The correlation between morphology and conductivity is established through atomic force microscopy and transmission length method measurements. On the other hand, change in the shape of the building blocks (from spheroidal-like to ellipsoidal-like) in the PEDOT:PSS films with DMSO concentration is apparent from their electron density profiles and topographies, suggesting possible conformational change (from coil-like to rod-like) in film by X-ray reflectivity. Such change is further evident from their compositional profiles, work functions and electronic band structures estimated from X-ray and ultraviolet photoelectron spectroscopies. In fact, complementary information suggest that near 5% DMSO doped PEDOT:PSS film is governed through maximum in-plane extended ellipsoidal-like blocks as well as well organized in out-of-plane ordering which is likely to be the optimum structure for increased the highest electrical conductivity up to 1230 S/cm. Finally, maximum power conversion efficiency of 11 % with open-circuit voltages around 600 mV, a short-circuit current density higher than 30 mA/cm2 and a fill factor of 59.4% is achieved for the 5% DMSO doped PEDOT:PSS/n-Si hybrid solar cell, which is perfectly correlated with their structure.
关键词： Morphology,Conductivity,PEDOT:PSS,DMSO doping,Hybrid solar cell
更新于2025-09-11 14:15:04
-
Self-formed PbI <sub/>2</sub> -DMSO adduct for highly efficient and stable perovskite solar cells
摘要： Currently, chemical vapor deposition (CVD) has attracted widespread attention for preparing high efficiency and large-scale perovskite solar cells (PSCs). The surface morphology and crystallinity of precursor lead iodide (PbI2) films play a critical role in the subsequent CVD process. Here, we use a self-formed PbI2-dimethyl sulfoxide adduct in precursor PbI2 for fabricating a high quality perovskite film. The results show that a larger grain size and excessive PbI2 in the perovskite film effectively suppress carrier recombination, which is helpful to improve the device stability and efficiency. It is noted that the device maintained an excellent stability with almost the same efficiency after 1000 h (in a dry N2 glovebox, 25 (cid:2)C). Finally, the PSC by using the CVD method exhibits a high power conversion efficiency of 17.9% with a bandgap of 1.60 eV, an open voltage (VOC) of 1140 mV, a short-circuit current density (JSC) of 20.1 mA/cm2, and a fill factor of 78%. This method provides guidance for preparing large-area solar cells or applications in tandem solar cells.
关键词： stability,perovskite solar cells,PbI2-DMSO adduct,chemical vapor deposition,efficiency
更新于2025-09-11 14:15:04
-
Influence of the Nature of the Nitrogen-Containing Base on the Kinetic Stability of Tetra(1,2,5-thiadiazolo)porphyrazine in Dimethyl Sulfoxide
摘要： The state of tetrakis(1,2,5-thiadizole)porphyrazine in the DMSO medium was studied. The proton-transfer complex that formed was found to be quite stable. This complex was shown to decompose in some strong base solutions after some delay. The influence of either the nature of nitrogen-containing base and NH acidity of the porphyrazine macrocycle on the destruction kinetics of proton-transfer tetrakis(1,2,5-thiadizole)-porphyrazine complexes was investigated.
关键词： destruction,DMSO,tetra(1,2,5-thiadiazolo)porphyrazine,proton-transfer complex,kinetics,nitrogen-containing base,acid?base interactions
更新于2025-09-10 09:29:36
-
First Hyperpolarizability of 1,3-Thiazolium-5-Thiolates Mesoionic Compounds
摘要： The first hyperpolarizabilities of the mesoionic compounds (MICs) 2-(4-chlorophenyl)-3-methyl-4-phenyl-1,3-thiazole-5-thiolate (MIC-1), 2-(4-chlorophenyl)-3-methyl-4-(4-methylphenyl)-1,3-thiazole-5-thiolate (MIC-2), and (2-(4-chlorophenyl)-3-methyl-4-(4-methoxyphenyl)-1,3-thiazole-5-thiolate) (MIC-3), dissolved in dimethyl sulfoxide (DMSO), are reported here for the first time to our knowledge. Hyper-Rayleigh scattering experiments were performed with an excitation source operating at ?? =1180 nm (?? = 8475 cm?1). The measured hyperpolarizability, ??(2??), was used to calculate the static hyperpolarizability, ??(0), by applying the classical two-level model. The values obtained for ??(0) were 10.1 × 10?30 esu (MIC-1), 8.7 × 10?30 esu (MIC-2) and 10.4 × 10?30 esu (MIC-3) which are smaller than previous theoretical predictions that did not consider features related to the liquid phase.
关键词： nonlinear optics,Hyper-Rayleigh scattering,mesoionic compounds,hyperpolarizability,DMSO
更新于2025-09-04 15:30:14