Publications associées à Time resolved diffuse reflectance spectroscopy on high efficient dye- and semiconductor- sensitized solar cells under operational condition

Publications associées (21)

Indium and Silver Recovery from Perovskite Thin Film Solar Cell Waste by Means of Nanofiltration

Due to minimal material use and low-cost processing, next-generation thin film solar cells represent a promising alternative to traditional crystalline silicon solar cells. Among these, metal-halide perovskite solar cells have seen significant improvements ...

American Chemical Society (ACS)2025

A thermotropic liquid crystal enables efficient and stable perovskite solar modules

Mohammad Khaja Nazeeruddin, Bin Ding, Yong Ding

Perovskite solar cells have seen impressive progress in performance and stability, yet maintaining efficiency while scaling area remains a challenge. Here we find that additives commonly used to passivate large-area perovskite films often co-precipitate du ...

Nature Portfolio2024

Surface and Electrolyte Engineering on Semiconductor Electrodes for solar-assisted CO2 Reduction

Meng Xia

Since the 1760s, modern civilization has significantly enhanced human efficiency and living standards, whereas it heavily depends on fossil fuels for primary energy. The overreliance raises concerns about energy and environmental crises. It prompts the nee ...

EPFL2024

Kilowatt-scale solar hydrogen production system using a concentrated integrated photoelectrochemical device

Sophia Haussener, Saurabh Yuvraj Tembhurne, Clemens Gregor Suter, Isaac Thomas Holmes-Gentle

The production of synthetic fuels and chemicals from solar energy and abundant reagents offers a promising pathway to a sustainable fuel economy and chemical industry. For the production of hydrogen, photoelectrochemical or integrated photovoltaic and elec ...

2023

Ultrathin GHz-speed free-space electro-optic modulators

Ileana-Cristina Benea-Chelmus

We discuss electro-optic modulators from flat optics that change the intensity of light at speeds up to the microwaves. We employ a hybrid platform that combines silicon-silica nanoresonators with an electro-optic organic coating that maximizes the interac ...

IEEE2022

Copolymer-Templated Nickel Oxide for High-Efficiency Mesoscopic Perovskite Solar Cells in Inverted Architecture

Michael Graetzel, Ulf Anders Hagfeldt, Wolfgang Richard Tress, Hong Zhang, Marco Alejandro Ruiz Preciado

Despite the outstanding role of mesoscopic structures on the efficiency and stability of perovskite solar cells (PSCs) in the regular (n-i-p) architecture, mesoscopic PSCs in inverted (p-i-n) architecture have rarely been reported. Herein, an efficient and ...

WILEY-V C H VERLAG GMBH2021

Identifying the Trade-off between Intramolecular Singlet Fission Requirements in Donor-Acceptor Copolymers

Anne-Clémence Corminboeuf, Maria Fumanal Quintana, Raimon Fabregat I De Aguilar-Amat

Intramolecular singlet fission (iSF) has shown Or potential to improve the power conversion efficiency in photo-voltaic devices by promoting the splitting of a photon-absorbing singlet exciton into two triplet excitons within a single molecule. Among diffe ...

AMER CHEMICAL SOC2021

Hydrogel Electrolytes Based on Xanthan Gum: Green Route towards Stable Dye-Sensitized Solar Cells

The investigation of innovative electrolytes based on nontoxic and nonflammable solvents is an up-to-date, intriguing challenge to push forward the environmental sustainability of dye-sensitized solar cells (DSSCs). Water is one of the best choices, thus 1 ...

MDPI2020

Gradient band structure: high performance perovskite solar cells using poly(bisphenol A anhydride-co-1,3-phenylenediamine)

Mohammad Khaja Nazeeruddin, Hiroyuki Kanda, Sanghyun Paek, Cristina Roldán Carmona, Aron Joel Huckaba, Albertus Adrian Sutanto, Hobeom Kim, Maria Cristina Momblona Rincón, Nadja Isabelle Desiree Klipfel, Mousa Abdulla M E Abuhelaiqa

Surface passivation is a critical factor for improving the photovoltaic performance of perovskite solar cells. However, more robust principle investigations are required to build effective passivation strategies enabling high-performance perovskite solar c ...

Royal Society of Chemistry2020

Indeno[1,2-b]carbazole as Methoxy-Free Donor Group: Constructing Efficient and Stable Hole-Transporting Materials for Perovskite Solar Cells

Ulf Anders Hagfeldt, Zhe Sun, Jialin Wang

With perovskite-based solar cells (PSCs) now reaching efficiencies of greater than 20 %, the stability of PSC devices has become a critical challenge for commercialization. However, most efficient hole-transporting materials (HTMs) thus far still rely on t ...

Wiley-VCH Verlag GmbH2019

Efficient Solar-vapor Generation in Hollow-mesoporous Plasmonic Nanoshells

Demetri Psaltis, Jeffrey Alan Hubbell, Ye Pu, Thomas La Grange, Jae-Woo Choi, Seyyed Mohammad Hosseini Hashemi, Miguel Antonio Modestino, Marcin Stefan Zielinski

Plasmonic nanostructures have shown great promise in solar thermal applications. Here we report highly efficient solar vapor generation using hollow-mesoporous plasmonic nanoshells, where the steam production is significantly enhanced by the extended activ ...

IEEE2018

Local estimation of the global horizontal irradiance using an all-sky camera

Mario Paolone, Fabrizio Sossan, Enrica Scolari

Localised and high-frequency measurements of the global horizontal irradiance (GHI) are a key information to assess the level of power production of distributed photovoltaic generation. The paper presents a supervised machine learning-based procedure to es ...

PERGAMON-ELSEVIER SCIENCE LTD2018

Extracellular bacterial inactivation proceeding without Cu-ion release: Drastic effects of the applied plasma energy on the performance of the Cu-polyester (PES) samples

Sami Rtimi, Michaël Bensimon

The widely different effects of Cu-polyester (PES) sputtered by high power impulse magnetron sputtering (HIPIMS) compared to the lower energy direct current magnetron sputtering (DCMS) leading to bacterial inactivation are addressed during the course of th ...

ELSEVIER SCIENCE BV2018

Synthesis and characterization of fluorinated anatase nanoparticles and subsequent N-doping for efficient visible light activated photocatalysis

Paul Bowen, Sami Rtimi, Irena Markovic

Fluorinated-titanium dioxide (TiO2-F) nanoparticles in a pure anatase polymorph was precipitated from solution by hydrolysis of titanium oxychloride, using urea and ammonia as precipitation agents and potassium fluoride as a source of fluorine anion. A fur ...

2018

Promoting a Sustainable Diffusion of Solar PV Electricity in Africa: Results of the CODEV Project

Christophe Ballif, Alessandro Francesco Aldo Virtuani, Eleonora Annigoni

In this work we present the result of a collaboration between the Polytechnic Schools of Dakar (ESP) and Lausanne (EPFL) on the testing and monitoring of solar photovoltaic modules. The collaboration has involved the exchange of knowledge, methodologies an ...

2017

Functional Engineering of Perovskite Nanosheets: Impact of Lead Substitution on Exfoliation in the Solid Solution RbCa2-xPbxNb3O10

Filip Mateusz Podjaski, Teresa Katharina Dennenwaldt

Tuning the chemical composition and structure for targeted functionality in two-dimensional (2D) nanosheets has become a major objective in the rapidly growing area of 2D materials. In the context of photocatalysis, both miniaturization and extending the l ...

Wiley-V C H Verlag Gmbh2017

Supported TiO2 films deposited at different energies: Implications of the surface compactness on the catalytic kinetics

César Pulgarin, Juan Kiwi, Sami Rtimi, Michaël Bensimon, Stefanos Giannakis, Rosendo Sanjines

Insight is provided in this study for the effect of the TiO2film densification/compactness on polyethy-lene (PE-TiO2) by sputtering TiO2at two very different energy levels. Uniform, adhesive low energy filmswere prepared by direct current magnetron sputter ...

Elsevier2016

Semiconductor electrode comprising a blocking layer

Michael Graetzel, Mohammad Khaja Nazeeruddin, Aravind Kumar Chandiran

The present invention provides a porous semiconductor electrode passivated by way of a layer applied by an atomic layer deposition (ALD) process. The semiconductor electrode can be advantageously used in dye-sensitized solar cells (DSCs) having increase op ...

2013

Highly soluble energy relay dyes for dye-sensitized solar cells

Michael Graetzel, Jun Ho Yum

High solubility is a requirement for energy relay dyes (ERDs) to absorb a large portion of incident light and significantly improve the efficiency of dye-sensitized solar cells (DSSCs). Two benzonitrile-soluble ERDs, BL302 and BL315, were synthesized, char ...

Royal Society of Chemistry2013

High Efficiency Quantum Dot Heterojunction Solar Cell Using Anatase (001) TiO2 Nanosheets

Michael Graetzel, Mohammad Khaja Nazeeruddin, Lioz Etgar

Wiley2012