Francesca Brunetti's research while affiliated with University of Rome Tor Vergata and other places
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Publications (45)
Flexible perovskite solar cells are lightweight, bendable, and applicable to curved surfaces. Polyethylene terephthalate (PET) has become the substrate of choice compared to other plastic substrates like polyethylene naphthalate. PET is not only stable but also much cheaper to manufacture, an important factor for photovoltaics (PV). Herein, highly...
Telecommunications companies are constantly chasing continuous technological advances with their management methods of Operations & Maintenance (O&M) that still struggle to turn their eye toward innovation and simplification of processes. In a future that aims at fully fiber-optic networks, the objective of the research is to propose guidelines and...
In response to the current trend of miniaturization of electronic devices and sensors, the complementary coupling of high-efficiency energy conversion and low-loss energy storage technologies has given rise to the development of photocapacitors (PCs), which combine energy conversion and storage in a single device. Photovoltaic systems integrated wi...
Flexible Perovskite solar cells have been considered promising candidates for novel applications that require a high power-to-weight ratio. However, the scalable and ambient air deposition of efficient devices are still major challenges of this technology. In addition, toxic solvents are regularly used in perovskite layer deposition that can damage...
Organic solar cells (OSCs) are showing great potential to be employed in indoor and outdoor applications. The utilization of portable electronics, internet of things (IoT), and sensors for wearable and...
Everyday healthcare objects have become the focus of interdisciplinary research lines, which aim to monitor human biomedical parameters by means of ergonomic and, ideally, environmentally sustainable sensors. Here, a hybrid system, based on both solution processed- and conventional silicon- technology, is reported. In particular, a strain and a pH...
Flexible electronics have become widespread in the last decade. Given the environmental crisis that our planet is facing, the use of sustainable materials, and less time and energy-consuming methods for the fabrication of flexible and light weight devices, have become crucial. In this context, the present study proposes a low environmental impact a...
Flexible perovskite solar cells (PSC) represent a viable technology for applications requiring high power‐to‐weight ratios, seamless integration onto a variety of shapes, and low embedded energy. Strategies to boost the performance of flexible PSC, which still lag behind their rigid counterparts, include passivation of the perovskite surface with a...
Recent experimental advances in perovskite solar cell (PSC) technology marked a new era for low-cost, flexible, and high-efficiency photovoltaics (PVs). In contrast, the study of the detailed physical mechanisms governing the optoelectronic properties of PSCs has not been keeping up with these breakthroughs, which have been eclipsing theoretical ef...
Perovskite Technology is advancing at unprecedented levels in the last years, with efficiencies reaching up to 25.7%. These incredible results are obtained at very small area scale (<0.1cm 2), reducing consistently its efficiency when increasing the area, with certified efficiency reaching up to 19.3% on 5x5cm2 substrate area [1] ; Module design is...
Electron transport layers (ETLs) play a fundamental role in perovskite solar cells (PSCs) through charge extraction. Here, we developed flexible PSCs on 12 different kinds of ETLs based on SnO2. We show that ETLs need to be specifically developed for plastic substrates in order to attain 15% efficient flexible cells. Recipes developed for glass sub...
In this work, we present the fabrication and characterization of bulk-heterojunction solar cells on monolayer graphene (MLG) with nickel-grids (Ni-grid) as semitransparent conductive electrode. The electrodes showed a maximum transmittance of 90% (calculated in 300–800 nm range) and a sheet resistance down to 35 Ω/□. On these new anodes, we fabrica...
Flexible perovskite solar cells feature high power-per-weight ratio and low cost manufacturing, which make them very attractive for space and avionic applications. It is thus paramount to assess their response to the harsh space environment. Although an increasing number of studies have been investigating the effect of electron and proton radiation...
Most laboratories employ spin coating with application of anti-solvent to achieve high efficiency in perovskite solar cells. However, this method wastes a lot of material and is not usable industrially. Conversely, large area coating techniques such as blade and slot-die require high precision engineering both for deposition of ink and for gas or e...
Perovskite solar modules (PSMs) have been attracting the photovoltaic market, owing to low manufacturing costs and process versatility. The employment of flexible substrates gives the chance to explore new applications and further increase the fabrication throughput. However, the present state-of-the-art of flexible perovskite solar modules (FPSMs)...
Flexible perovskite solar cells (FPSCs) are prime candidates for applications requiring a highly efficient, low-cost, lightweight, thin, and even foldable power source. Despite record efficiencies of lab-scale flexible devices (19.5% on a 0.1 cm² area), scalability represents a critical factor toward commercialization of FPSCs. Large-area automized...
Flexible perovskite solar cells (f-PSCs) are light-weight, conformal and thus ideal for seamless integration of photovoltaics onto wearable and portable electronics. Nevertheless, the spread of f-PSCs is limited by both the lower efficiency compared to rigid counterparts and the employment of costly materials. Among them, hole-transporting material...
Long-term stability of perovskite solar cells (PSCs) is one of the main issues to be solved for forthcoming commercialization of this technology. In this work, thermosetting polyurethane (PU)-based resins are proposed as effective encapsulants for perovskite solar cells to prevent degradation caused by both moisture and oxygen. Application consists...
Comparison between different laboratories on long‐term stability analyses of perovskite solar cells (PSCs) is still lacking in the literature. This work presents the results of an inter‐laboratory study carried out between 5 laboratories from 4 countries. Carbon‐based PSCs were prepared by screen printing, encapsulated and sent to different laborat...
In response to the request for flexible and sustainable energy storage devices with high electrochemical performance, a great interest is focused on developing environmentally friendly supercapacitors. In this context, cellulose‐based substrates for energy storage devices could be well‐engineered, are light‐weight, safe, thin and flexible. Herein,...
In the renewable energy field, the use of hybrid perovskite materials has opened up new directions to fabricate cost‐effective and highly efficient photovoltaic devices. Despite impressive power conversion efficiency (PCE), exceeding 25.2%, demonstrated on lab‐scale devices, scalability and stability of device are still topical issues. In this cont...
Improving the long-term stability of perovskite solar cells is critical to the deployment of this technology. Despite the great emphasis laid on stability-related investigations, publications lack consistency in experimental procedures and parameters reported. It is therefore challenging to reproduce and compare results and thereby develop a deep u...
We report a cooperative study conducted between different laboratories to investigate organic solar cell degradation with respect to P3HT material properties and different solar cell architectures. Various batches of P3HT were collected from different suppliers reflecting commercial availability as well as properties variability. Among the material...
The doping effect of carbon nanodots (CNDs) in the PC 61 BM electron-transport layer on the performance of inverted planar MAPbI 3 perovskite solar cells (PSCs) having two different kinds of the hole-transport layer, namely organic PEDOT:PSS and inorganic NiO x , was investigated. The CH 3 NH 3 PbI 3 perovskite layer was deposited in air at 35% hum...
The development of hybrid organic-inorganic halide perovskite solar cells (PSCs) that combine high performance and operational stability is vital for implementing this technology. Recently, reversible improvement and degradation of PSC efficiency have been reported under illumination-darkness cycling. Quantifying the performance and stability of ce...
We report a novel multi-step method for the preparation of ordered mesoporous titania scaffolds with potential for application to perovskite-based solar cells. The first step is the preparation of a monolayer of polystyrene nanoparticles at a water-air interface and its subsequent transfer onto a solid substrate. A titania precursor solution (titan...
In this work PTB7:[70]PCBM (Poly[[4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl] [3-fluoro-2-[(2-ethylhexyl)carbonyl] thieno[3,4-b] thiophenediyl]]:[6,6]-Phenyl-C71-butyric acid methyl-ester ([70])) based solar cells with PEIE (Polyethylenimine, 80% Ethoxylated) as electron transport layer (ETL) have been characterized along two...
Microstructural and morphological features of the layers forming integrated PTB7/PC71BM organic solar cells with Ca/Al cathode are studied. The effects of vacuum treatment on properties and durability were addressed using complementary approaches: time-resolved experiments revealing the structural evolution of the active layers under illumination w...
A simple and intuitive deposition technique is discussed to obtain titanium oxide used as an
electron collecting layer in polymer solar cells based on the thermal evaporation of pristine
titanium and further thermal treatment to convert the metal in oxide. Since the degradation of
indium-doped tin oxide at high temperatures is an issue, we demonstr...
Photonic technologies are becoming more and more necessary for data centre (DC) networks to meet the requirements of data transfer speed and energy saving. The use of optical hybrid wired/wireless solutions, where fibre links are coupled to free space optical links within the same DC facility can contribute to reduce the complexity of the network a...
A proper growth of Iodine based perovskite nanocrystals is crucial for photovoltaic applications and this process is highly affected from the scaffold used for the crystallization. In this work, ordered nanoporous alumina, realized by controlled anodizing of two different thickness layer of Al, deposited on glass and Indium Tin Oxide (ITO), was use...
In polymer solar cells based on the blend of regioregular poly(3-hexylthiophene) (P3HT) and phenyl-C61-butyric acid methyl ester, the hole collecting layer has to be endowed with its ionization potential close to or greater than that of P3HT (∼5 eV). Conductive polymer blends such as poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:P...
Citations
... Several kinds of photovoltaic (PV) devices were built thus far, and each type has its very own unique devotions and drawbacks. These devices commonly differ in production tactics, appearance, performance, prices, and installation situations [5]. Nanomaterials catch a vital impact on nanoscience and nanotechnology. ...
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... There are a lot of choices of flexible substrates for the development of flexible and wearable antennae and sensors available in the literature, including fabric-, polymer-, and paper-based substrates [4][5][6]. Due to their multiple advantages over rigid and fabric substrates, polymers have been increasingly popular as a substrate for the design of flexible/wearable antenna sensors in the last few years. Flexible devices require bending, stretching, and twisting, and rigid substrates do not perform well under these conditions. ...
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... BC is a mesoporous membrane formed by bacteria cellulose nano bers. It has been reported when used as substrates for conducting polymer deposition, the hydrophilic nature of BC could result in better uniformity of the lm [23,24,25]. Herein, PEDOT:PSS is coated on one side of BC, and an electrostatic voltage of + 1.5 V and − 1.5V is used to induce the de ection. ...
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... This is a result of the unique advantages of OMH perovskites such as the ease of fabrication, high cost-effectiveness, adjustable band gap, low recombination rate, high carrier mobility and high light absorption coefficients [16][17][18][19][20][21][22][23]. During the last decade PSCs have improved their efficiency noticeably, with the cell performance achieving efficiencies in excess of 25% [24][25][26][27][28][29][30]. Improving the performance of such devices requires advanced knowledge of charge transport and dynamics within the active layer, which are directly related to the device's efficiency. ...
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... The electron transport layer (ETL) in PSCs plays an indispensable role in collecting and transporting photogenerated electron carriers and serves as a hole-blocking layer, thus realizing effective charge separation and suppressing charge-carrier recombination. The ETL in PSCs should possess [25][26][27][28][29][30][31]: ...
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... Graphene has shown an interesting potential as a transparent conductor in several optoelectronic devices, such as LED, solar cells, touch screens, and so on [13,14]. Danietti et al. [15] studied the incorporation of graphene as a transparent conductive layer in organic cells. For this purpose, they also included a Niquel grid below the graphene layer to enhance electrical conductivity. ...
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... High volatile elements evaporate from the substrate while the target components remain on the substrate's surface. The coating thickness can be controlled by the solution structure and spinning speed [115]. ...
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... Notably, the retention characteristics of HRS and LRS do not show any degradation up to 10 3 s, as shown in figures 5(d)-(f) respectively. All the results demonstrate our samples show good endurance and retention properties, which are helpful for memories and memristors in the field of ReRAM memory cells [18,19]. ...
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... PET/ITO/PTAA/PFN/ MAPI/C60/BCP/Ag 1 DMF 14.58 (Martin et al., 2020) PET/ITO/PTAA/Cs 0.17 FA 0.85 Pb(I 0.9 Br 0.1 ) 3 /C60/BCP/Ag 2 DMF: NMP 13.02 (Castriotta et al., 2021) PET ...
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... These laser-assisted perovskite patterning methods are a type of multiscale structuring techniques that are mask-free and programmable. Laser scribing is a noncontact process using a high-peak-power laser with high accuracy and throughput that scribes small line structures on a substrate coated with organic/inorganic materials [50][51][52][53][54][55][56][57]. Nicolay et al. reported thin-film laser patterning techniques to fabricate highefficiency perovskite solar devices with an enlarged active area [52]. ...
