A5074870343- Perovskite Materials and Applications
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Organic Electronics and Photovoltaics
- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Organic and Molecular Conductors Research
- Solid-state spectroscopy and crystallography
- Thermal Expansion and Ionic Conductivity
- solar cell performance optimization
- Magnetic and transport properties of perovskites and related materials
- Advanced battery technologies research
- Advanced Thermoelectric Materials and Devices
- Extraction and Separation Processes
Syracuse University
2020-2024
South Dakota State University
2015-2021
Brookings Institution
2017-2018
Abstract Interface engineering is critical to the development of highly efficient perovskite solar cells. Here, urea treatment hole transport layer (e.g., poly(3,4‐ethylene dioxythiophene):polystyrene sulfonate (PEDOT:PSS)) reported effectively tune its morphology, conductivity, and work function for improving efficiency stability inverted MAPbI 3 cells (PSCs). This has significantly increased photovoltaic performance 18.8% treated PEDOT:PSS PSCs from 14.4% pristine devices. The use controls...
Dithieno[3,2-<italic>b</italic>:2′,3′-<italic>d</italic>]pyrrole (DTP) derivatives are one of the most important organic photovoltaic materials due to better π-conjugation across fused thiophene rings.
An optimal small amount of water added into methyl ammonium iodide (MAI) solution in isopropyl alcohol (IPA) helps perovskite crystallization and leads to larger grain size from sequential deposition films. The concentration was varied 1% 7% (vol% IPA) MAI optical absorption, crystallization, morphology films their photovoltaic performance were studied solar cells. 5% by volume found lead preferential the (110) plane with about three times that prepared without adding solution. led average...
It has been a challenge to use transitional metal oxides as anode materials in Li-ion batteries due their low electronic conductivity, poor rate capability and large volume expansion.
Perovskite solar cells (PSCs) typically exhibit hysteresis in current density-voltage ( J- V) measurements. The most common type of V PSCs is normal hysteresis, which the performance reverse scan better than that forward scan. However, inverted also exists, worse scan; this however, significantly less well studied. In work, we show decreases when sweep rate decreased only cases involving a small bias range, and it does not decrease with large range. Under slowing rate, observe enhanced or...
Abstract In recent years, halide perovskite solar cells (HPSCs) have attracted a great attention due to their superior photoelectric performance and the low‐cost of processing quality films. order commercialize HPSCs, researchers are focusing on developing high‐performance HPSCs. Many strategies been reported increase power conversion efficiency long‐term stability HPSCs over past decade. Herein, we review latest efforts chemical‐physical principles for preparing high‐efficiency in...
Solid-state lithium batteries are generally considered as the next-generation battery technology that benefits from inherent nonflammable solid electrolytes and safe harnessing of high-capacity metal. Among various solid-electrolyte candidates, cubic garnet-type Li7La3Zr2O12 ceramics hold superiority due to their high ionic conductivity (10–3 10–4 S cm−1) good chemical stability against However, practical deployment solid-state based on such materials has been constrained by poor interfacing...
The efficiencies of perovskite solar cells have been significantly increased to 18%, 17.01% and 15.6% <italic>via</italic> doping with BMImI, LiI LiTFSI in the PbI<sub>2</sub> precursor solutions, respectively, <italic>versus</italic> 11.3% for undoped devices.
Abstract Photovoltaic power‐conversion systems can harvest energy from sunlight almost perpetually whenever sunrays are accessible. Meanwhile, as indispensable storage units used in advanced technologies such portable electronics, electric vehicles, and renewable/smart grids, batteries energy‐limited closed require constant recharging. Fusing these two essential into a single device would create sustainable power source. Here, it is demonstrated that an integrated be realized by fusing...
Abstract In this work, methylammonium lead triiodide (CH 3 NH PbI ) perovskite solar cells with efficiencies higher than 18% were achieved using a new nanocomposite hole transport layer (HTL) by doping poly(ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) mixed dopant of polyaniline (PANI) and graphene oxide (GO). A synergistic engineering between GO, PANI, PEDOT:PSS was accomplished to introduce additional energy levels increase the conductivity PEDOT:PSS. Kelvin probe force...
Perovskite solar cells (PSCs) have made great strides in recent years, operating inside the theoretical Scholkely–Quisser efficiency limit with a certified power conversion (PCE) of 26.1%. However, lead toxicity from Pb‐based PSCs can harm environment. As result, search for nontoxic and environmentally friendly substances to replace Pb perovskites is need hour. Tin has emerged as most viable choice Pb, due its favorable electronic properties smaller bandgaps Sn‐based between 1.1 1.4 eV,...
Perovskite solar cells offer tremendous potential for simple and low-cost solution-based fabrication with high power conversion efficiency. This work focused on adding an optimized amount of additive tetra-n-butylammonium triiodide (TBAI3) into the precursor PbI2 layer to improve performance perovskite cells. UV–vis absorption spectra exhibited enhancement in absorbance films while AFM images showed smoother MAPbI3 film after TBAI3. X-ray diffraction (XRD) measurements indicated that TBAI3...
Abstract In this work, grain boundary (GB) potential barrier ( Δφ GB ), dopant density P net and filled trap state GB,trap ) were manipulated at the nanoscale by exposing fabricated perovskite films to various relative humidity (RH) environments. Spatial mapping of surface in film revealed higher positive GBs than inside grains. The average , decreased from 0% RH 25% exposure, but increased when 35% 45% RH. This clearly indicated that solar cells led lowest potential, smallest density, least...
The combination of organic ligands and inorganic Pb–I frameworks in layered perovskites has bestowed upon them high structural tunability stability, while their microscopic degradation mechanism remains unclear. Here, we found the key role intrinsic stability consequent morphological evolution during long-term ambient aging based on (GA)(MA)nPbnI3n+1 (GA = guanidinium, <n> 4) (BDA)(MA)n−1PbnI3n+1 (BDA 1,4-butanediammonium, < n > perovskites. BDA-based have a low due to crystal formation...
The goal of this work is to substitute the conventional high-cost poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) in inverted perovskite solar cells (PSCs) with an efficient and conducting polyaniline (PANI) polymer. reported use PANI PSCs involves a chemical synthesis method which prone contamination impurities as it requires several materials for polymerization adhesion improvement substrates, contributing low device efficiencies. This mitigates issue using...
Abstract All‐inorganic perovskite solar cells (PSCs) are most promising in yielding stabilized power conversion efficiencies (PCE) as compared to their hybrid organic–inorganic counterparts. However, all‐inorganic PSCs have suffered from low efficiency due significant charge carrier recombination within active layer (PAL) bulk and at the selective interfaces (CSI). Boosting PCE through remedy both issues seems be only Achilles‐Heal on way commercialization. Here, a synergistic approach of...
Abstract This research delves into the effects of 2D layers on functionality 3D perovskite using lock‐in amplifier‐based in situ surface photovoltage (SPV) and its phase spectroscopy, with an emphasis elucidating connection between tuning dipole moments photocurrent hysteresis. Conventionally, SPV a perovskite/hole transport layer is observed to diminish as positive bias escalates. However, this trend reversed case samples, where augmentation noted under bias. Notably, 3D/2D structures...
Perovskite solar cells (PSCs) have received considerable attention in recent years due to their low processing cost and high‐power conversion efficiency. However, the mechanisms of PSCs are not fully understood. A model based on a probabilistic statistical approach needs be developed simulate, optimize, predict photovoltaic (PV) performance PSC. Herein, 3D kinetic Monte Carlo (KMC) is simulate morphology perovskite‐based PV performances charge dynamics. The incorporates temporal physical...