A5101430053- Perovskite Materials and Applications
- Conducting polymers and applications
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Organic Electronics and Photovoltaics
- Organic Light-Emitting Diodes Research
- Thin-Film Transistor Technologies
- Advanced battery technologies research
- Sulfur-Based Synthesis Techniques
- Polyoxometalates: Synthesis and Applications
- Gas Sensing Nanomaterials and Sensors
- Transition Metal Oxide Nanomaterials
- Electronic and Structural Properties of Oxides
University of Rome Tor Vergata
2022-2023
Indian Institute of Science Bangalore
2018-2020
The technology of organometal halide perovskites is on the verge lab to fab transition due particularly high efficiencies and low cost raw materials employed in active later. hole transport layer a key enabling component such solar cells at same time one requiring more significant synthetic efforts. Alternative with improved sustainability are under constant development, yet 2,2′,7,7′-tetrakis(N,N-di(4-methoxyphenyl)amino)-9,9′-spirobifluorene (Spiro-OMeTAD) still represents standard field....
Perovskite solar cells (PSCs) have different theoretical optimal bandgaps (Eg) for outdoor and indoor light harvesting due to the spectral distributions of sun lamps. This work focuses on understanding how both photovoltaic (PV) performance Cs0.05(MA0.17FA0.83)0.95Pb(I1–xBrx)3 PSCs depend Br– content (x) spanning whole 0–100% range, not only efficiency but also stability. Eg increases linearly with x: Eg/eV = 0.75x+1.48. Cells x 0.17 delivered highest under illumination, which did correspond...
EuCl 3 doping in triple-cation perovskites boosts efficiency of photovoltaic cells from 27% to 30% at 1000 lx under indoor lighting. Furthermore, t50 lifetimes (times which efficiencies half) more than doubled thermal stress tests 85 °C.
Perovskite Solar Cells (PSCs) have attracted attention due to their low cost, easy solution processability, high efficiency, and scalability. However, the benchmark expensive hole transport material (HTM) 2,2′,7,7′-tetrakis[N, N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene (Spiro-MeOTAD), which is traditionally solution-processed with toxic solvents such as chlorobenzene (CB), dichlorobenzene (DCB), or toluene, a bottleneck. To address this issue, work investigates implementation of...
Organic solar cells (OSCs) fabricated from ternary blend thin film absorbers are designed to maximize the range of absorption in spectrum and thus increase short-circuit current density (JSC) device. Herein, we report OSCs formed with two different compositions films comprising electron donors one acceptor, namely, PTB7-Th/PCDTBT/IT4F PTB7-Th/PBDB-T/IT4F. We evaluate role Förster resonance energy transfer (FRET) morphology achieve composition-dependent device performance. observed ≥10%...
Interfacial layers improve organic solar cells performance, but they behave differently in low light intensities respect to 1 sun. This study highlights the importance of selecting right IFLs suppress leakage current and enhance efficiency.
Atomically-abrupt interfaces in transition metal oxide (TMO) heterostructures could host a variety of exotic condensed matter phases that may not be found the bulk materials at equilibrium. A critical step development such atomically-sharp is deposition atomically-smooth TMO thin films. Optimized conditions exist for growth perovskite oxides. However, rutile oxides, as VO$_2$, with atomic-layer precision has been challenging. In this work, we used pulsed laser (PLD) to grow VO$_2$ films on...
Efficient and sustainable Buchwald-Hartwig amination enables the synthesis of new branched polymeric HTL materials for perovskite solar cells with performances comparable those Spiro-OMeTAD.
This work demonstrates a method to form 1-D ethylammonium lead iodide (EAPbI3) thin-films by dimensional down-conversion of 3-D methylammonium (MAPbI3) perovskite. The process leverages cation-exchange that occurs during exposure ethylamine vapor and subsequent annealing. Based on the extensive materials characterization, detailed mechanism transformation is proposed. also improves morphology films, yielding compact EAPbI3 films with roughness 50-100 nm, low-pin-hole density, grain-size 1-3...
The huge market for Internet of Things (IoT) devices brings unprecedented opportunities indoor photovoltaics (PV). Perovskite solar cells (PSCs) are one the best candidates owing to their outstanding low-light conversion capability. However, performance still suffers from trap-assisted recombination in cells, especially under low light levels. Here, first time, we developed and comprehensively investigated impact EuCl 3 doping on PV triple-cation narrow-bandgap (1.58 eV) n-i-p PSCs at...