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Harnessing Halogen Bond in Perovskite Solar Cells

Project description

Innovative perovskite solar cells that last longer with less toxicity

The first practical silicon solar cell was demonstrated nearly seven decades ago; its efficiency was a mere six percent. Although silicon continues to dominate the photovoltaics market, perovskite and hybrid perovskite-silicon solar cells are breaking efficiency records. However, there are challenges: their performance does not hold up over time, toxic materials are required, and crystal defects result in energy losses. With the support of the Marie Skłodowska-Curie Actions programme, the HaloCell project will enhance protection against environmental degradation, cut energy losses and reduce toxicity via a halogen bonding process. The innovative perovskite solar cells will be used in the fabrication of smart plexiglass windows, enabling solar power generation in architectural elements.


It is established that fossil fuels enabled a huge global economic growth although resulted to a fragile equilibrium between fuel prices and economic development, an unsustainable exploitation of the natural resources and prompted the ongoing environmental and societal crisis. Solar-driven energy production is pivotal for glass-architecture buildings, public transportation, domestic/corporate roof-tops/windows and rural areas (i.e. greenhouses); oriented to EU policies for Decarbonization of the EU building stock and European Green Deal for efficient, clean and cheap energy. In the last decade, solution-processable metal halide perovskite solar cells (PSCs), a technology originated from dye-sensitized solar cells (DSSCs), the most prominent alternative to the dominant (95% market stake) 1st gen. PVs, has emerged. Major drawbacks towards the commercialization of PSCs are the: i) instability in prolonged environmental exposure (moisture, oxygen, irradiation), ii) toxicity of employed lead and its derivatives (i.e. PbI2) and iii) crystal defects resulting in energy losses due to non-radiative charge recombination. HaloCell aims to hamper losses due to non-radiative recombination, embody protection towards environmentally driven-hydrolysis/oxidation and manage toxicity of PSCs and luminescent solar concentrators (LSCs), harnessing a holistic halogen bonding strategy. Multifunctional tailored organic compounds will be utilized to enable selective interplay with perovskite crystal lattice via halogen bonding interactions towards PSCs with power conversion efficiencies and long-term stability under stress conditions (illumination, high temperature, ambient air) exceeding current state-of-the-art. The newly-developed PSCs will be exploited as solar cells coupled to luminescent solar concentrators for the fabrication of smart architecture elements (plexiglass windows).


Net EU contribution
€ 235 737,60
20133 Milano

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Nord-Ovest Lombardia Milano
Activity type
Higher or Secondary Education Establishments
Total cost
No data

Partners (2)