Publications by Filippo de Angelis

Functionalized BODIPYs as Tailor-Made and Universal Interlayers for Efficient and Stable Organic and Perovskite Solar Cells

Mohammad Khaja Nazeeruddin, Filippo de Angelis, Konstantina Kalliopi Armadorou

Solar cells based on metal halide perovskite and polymer donor:nonfullerene acceptor blend absorbers have recently witnessed a significant rise in their photovoltaic performance. However, they still suffer from some instability issues originating from the ...

WILEY2022

Surface Reconstruction Engineering with Synergistic Effect of Mixed‐Salt Passivation Treatment toward Efficient and Stable Perovskite Solar Cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Ulf Anders Hagfeldt, Filippo de Angelis, Hui-Seon Kim, Bowen Yang, Jiajia Suo, Yeonju Kim

Surface passivation treatment is a widely used strategy to resolve trap-mediated nonradiative recombination toward high-efficiency metal-halide perovskite photovoltaics. However, a lack of passivation with mixture treatment has been investigated, as well a ...

2021

Bi-functional interfaces by poly(ionic liquid) treatment in efficient pin and nip perovskite solar cells

Mohammad Khaja Nazeeruddin, Giulia Grancini, Christian Michael Wolff, Filippo de Angelis, Albertus Adrian Sutanto, Antonio Abate, Pietro Caprioglio

Approaches to boost the efficiency and stability of perovskite solar cells often address one singular problem in a specific device configuration. In this work, we utilize a poly(ionic liquid) (PIL) to introduce a multi-functional interlayer to improve the ...

ROYAL SOC CHEMISTRY2021

Universal approach toward high-efficiency two-dimensional perovskite solar cells via a vertical-rotation process

Mohammad Khaja Nazeeruddin, Tom Theodorus Antonius Lummen, Pascal Alexander Schouwink, Yong Ding, Filippo de Angelis, Cristina Roldán Carmona, Mo Li, Cheng Liu

The emerging 2D perovskites exhibit superior stability and similar optoelectronic attributes compared to the 3D analogues, but their strong exciton-binding energy and inferior interlayer charge-transport reduce dramatically the device performance. Herein, ...

2020

Outstanding Passivation Effect by a Mixed-Salt Interlayer with Internal Interactions in Perovskite Solar Cells

Ulf Anders Hagfeldt, Wolfgang Richard Tress, Bowen Yang, Filippo de Angelis, Jiajia Suo, Hui-Seon Kim

Nonradiative recombination is a major limiting factor in obtaining efficient metal-halide perovskite photovoltaics. Here, a passivation treatment is developed by applying a mixture of a new ammonium salt, CF3(CF2)(2)CH2NH3I (HBAI), and a conventional forma ...

AMER CHEMICAL SOC2020

An Oxa[5]helicene-Based Racemic Semiconducting Glassy Film for Photothermally Stable Perovskite Solar Cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Filippo de Angelis, Peng Wang, Yang Li, Yang Li, Jialin Wang

Attaining the durability of high-efficiency perovskite solar cells (PSCs) operated under concomitant light and thermal stresses is still a serious concern before large-scale application. It is crucial to maintain the phase stability of the organic hole-tra ...

2019

Introduction of a Bifunctional Cation Affords Perovskite Solar Cells Stable at Temperatures Exceeding 80 degrees C

Mohammad Khaja Nazeeruddin, Paul Joseph Dyson, Cristina Roldán Carmona, Filippo de Angelis, Erfan Shirzadi

Perovskite solar cells (PSCs) with high efficiencies have been reported in recent years. Consequently, the main obstacle that hinders their commercialization is their poor thermal stability. Here, we describe the introduction of an A-site cation (2-choloro ...

AMER CHEMICAL SOC2019

Globularity-Selected Large Molecules for a New Generation of Multication Perovskites

Michael Graetzel, Wolfgang Richard Tress, Ulf Anders Hagfeldt, Michael Saliba, Antonio Abate, Filippo de Angelis, Juan-Pablo Correa-Baena, Silver Hamill Turren Cruz

Perovskite solar cells (PSCs) use perovskites with an APbX(3) structure, where A is a monovalent cation and X is a halide such as Cl, Br, and/or I. Currently, the cations for high-efficiency PSCs are Rb, Cs, methylammonium (MA), and/or formamidinium (FA). ...

Wiley-Blackwell2017

Migration of cations induces reversible performance losses over day/night cycling in perovskite solar cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Ulf Anders Hagfeldt, Wolfgang Richard Tress, Michael Saliba, Antonio Abate, Filippo de Angelis, Konrad Domanski, Juan-Pablo Correa-Baena, Silver Hamill Turren Cruz

Perovskites have been demonstrated in solar cells with a power conversion efficiency of well above 20%, which makes them one of the strongest contenders for next generation photovoltaics. While there are no concerns about their efficiency, very little is ...

Royal Soc Chemistry2017

One-Year stable perovskite solar cells by 2D/3D interface engineering

Michael Graetzel, Mohammad Khaja Nazeeruddin, Giulia Grancini, Filippo de Angelis, Iwan Zimmermann, Cristina Roldán Carmona

Despite the impressive photovoltaic performances with power conversion efficiency beyond 22%, perovskite solar cells are poorly stable under operation, failing by far the market requirements. Various technological approaches have been proposed to overcome ...

Nature Publishing Group2017