A5043927213- Perovskite Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- ZnO doping and properties
- Organic Electronics and Photovoltaics
- Organic Light-Emitting Diodes Research
- Gas Sensing Nanomaterials and Sensors
- Thin-Film Transistor Technologies
University of Naples Federico II
2021-2024
National Agency for New Technologies, Energy and Sustainable Economic Development
2021-2024
ENEA Portici Research Centre
2023
Helmholtz-Zentrum Berlin für Materialien und Energie
2023
National Interuniversity Consortium of Materials Science and Technology
2023
In perovskite solar cells (PSCs) energy level alignment and charge extraction at the interfaces are essential factors directly affecting device performance. this work, we present a modified interface between all-inorganic CsPbI3 its hole-selective contact (spiro-OMeTAD), realized by dipole molecule trioctylphosphine oxide (TOPO), to align levels. On passivated film, with n-octylammonium iodide (OAI), created an upward surface band-bending TOPO treatment. This improved induces better enhances...
Perovskite solar cells (PSCs) have the potential for widespread application, but challenges remain a reliable characterization of their performance. Standardized protocols measuring and reporting are still debated. Focusing on short circuit current density ( J SC ), current–voltage characteristics J–V ) external quantum efficiency (EQE) collected to estimate parameter. Still, they often provide mismatch above 1 mA cm −2 , resulting in possible 5% or higher error. Combining experimental data...
The aim of this work is to investigate the degradation perovskite solar cells (PSCs) by means impedance spectroscopy, a highly sensitive characterization technique used establish electrical response device in nondestructive manner. In paper, PSCs with two different electron transport layers (ETLs) are studied: undoped SnO2 as an ETL compared composed graphene-doped (G-SnO2). Experimental data were collected immediately after fabrication and one week, monitoring both spectroscopy dark...
Abstract We investigate the optical and transport properties of two widely used perovskite materials for solar cells, methylammonium lead iodide (MAPI) triple-cation (TriLHP), using first-principles calculations. Our theoretical results, supported by ellipsometry measurements, show that MAPI exhibits stronger dielectric screening better absorption characteristics, which could contribute to enhanced defect tolerance less sensitivity light intensity fluctuations. In contrast, TriLHP...
In recent years, SnO 2 quantum dots (QDs) have been widely used for preparing the electron‐transport layer within perovskite solar cells (PSCs). However, fabricated devices exhibit an evident hysteresis unless interlayer materials are introduced to passivate or prevent formation of trap states at –perovskite interface. Herein, use zwitterion 3‐(1‐pyridinio)‐1‐propanesulfonate (PPS) as additive inside QDs solution is proposed. The results highlight that PPS plays a multifunctional role by...
Doping SnO 2 with Mg can lead to non-linear effects on the conduction band edge potentials, first-principles calculations allow dissecting origin of such behavior.
Perovskite/silicon tandem solar cells have strong potential for high efficiency and low cost photovoltaics. In monolithic (two-terminal) configurations, one key element is the interconnection region of two subcells, which should be designed optimal light management prevention parasitic p/n junctions. We investigated perovskite/silicon-heterojunction (SHJ) with a nanocrystalline silicon/silicon-oxide recombination junction improved infrared management. This design can additionally provide...
Improving morphological and electronic properties of the electron transport layer (ETL) is a critical issue to fabricate highly efficient perovskite solar cells. Tin dioxide used as an ETL for its peculiarities such low-temperature solution-process high mobility several handlings have been tested increase performances. Herein, SnO2:ZnO SnO2:In2O3 composites are studied in planar n-i-p CH3NH3PbI3 cells fabricated ambient air, starting from glass/ITO substrates. Morphological, electrical...
Characterizing the electron transport layer (ETL)/perovskite interface in perovskite solar cells (PSCs) is of paramount importance for their overall performance. In this article effect different concentrations graphene nanoplatelets addition to SnO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> investigated by considering degradation over time. PSCs behavior monitored collecting dark current–voltage curves as fabricated and after two...
Abstract Several theoretical studies at different levels of theory have attempted to calculate the absolute position SnO 2 conduction band, whose knowledge is key for its effective application in optoelectronic devices such us, example, perovskite solar cells. However, predicted band edges fall outside experimentally measured range. In this work, we introduce a computational scheme designed minimum values , yielding results aligned with experiments. Our analysis points out fundamental role...
Alkali halides are simple inorganic compounds extensively used as surface modifiers in optoelectronic devices. In perovskite solar cells (PSCs), they act interlayers between the light absorber material and charge selective layers improving their contact quality. They introduce dipoles that enable fine tuning of relative band alignment passivate defects, a well-known drawback hybrid organic-inorganic perovskites, is responsible for most issues hampering long-term performances. Reducing...
In perovskite solar cells (PSCs) energy levels alignment and charge extraction at the interfaces are essential factors directly affecting device performance. this work, we present a modified interface between all-inorganic CsPbI$_3$ its hole selective contact (Spiro-OMeTAD), realized by dipole molecule trioctylphosphine oxide (TOPO), to align levels. On passivated film, n-Octyl ammonium Iodide (OAI), created an upward surface band-bending TOPO treatment. This improved induces better level...