+41 22 552 62 26 info@vps-suisse.com







VPS – Valais Perovskite Solar is a company based in Switzerland with the focus on Molecular Engineering of Functional Materials for Photovoltaic and Light-emitting applications.


The target of the company is to bring an abundant and renewable source of energy using low-cost solar cells to all over the world.

Figure 1. Estimates of finite and renewable planetary energy reserves (Terawatt Years).


Presently, over 85% of the World’s energy requirements are satisfied by fossil fuels with devastating consequences on the environment and society.1 The energy demand is predicted to increase by almost 30% during the next 20 years due largely to population growth and, consequently, solar energy is considered as the ultimate source of clean, secure and renewable electricity. The world global installed photovoltaic (PV) capacity will likely reach well over 1000 GW by 2030 and could reach up to 5000 GW by 2050. At this moment, solar energy will be one of the major electricity sources worldwide, with the lowest costs and environmental impact, while contributing to mitigating CO2 gas emissions. Solar energy is indeed recognized as the fastest growing technology by the World economic forum (press, October 2017), and appointed as the future solution for a carbon-free economy given the limited finite sources of planetary energy reserves (see Figure 1). The use of silicon-based solar systems is widespread accounting for over 90% of the installed PV. However, their manufacturing costs remain high due to in part technologically intensive fabrication of silicon wafer. New PV technologies with higher potential performances at a lower manufacturing and materials cost will lead to a paradigm shift in energy generation. In this context, the new technology based on Perovskite solar cells (PSCs) has emerged in the last few years and nowadays considered one of the most excited PV technology of our time. PSCs are leading a real revolution in power generation, standing over the main technologies on the market, reaching power conversion efficiency (PCE) surpassing 23%.2 In addition to high efficiency, their low-temperature solution deposition methods compatible with printing are the great advantage over existing technologies making the PSCs cost effective with the levelled cost of electricity below the mainstream silicon photovoltaics.


  • Molecular Engineering of Sensitizers for Dye-Sensitized Solar Cells and Organic Light-Emitting Diodes
  • Perovskite solar cells
  • Design and development of charge transporting materials
  • Photophysics and Photochemistry of Molecular Assemblies

Frequent Answered Question about Solar Perovskite

What is the Perovskite market?

Perovskite structures will revolutionize solar cell devices and will transform the business of solar power. The business of solar power in a 25-year period has grown exponentially, transforming the technology from rarefied oddity to the world’s fastest-growing energy source. 100MW of capacity in 1992 rocket to more than 300GW in 2016. The solar-power industry invested $160bn in 2017.

A fifth of the world’s energy consumption is supplied by renewables.

The world’s renewable power capacity could supply an estimated 26% of global electricity.

55% of new renewable power installations were solar photovoltaics (PV) and these accounted for more than the combined additions of fossil fuel and nuclear in 2017.

Global trends in solar energy indicate a critical need to provide renewable and reliable energy to the world.  According to an article of The Economist, 1.5 billion people, or more than a fifth of the world’s population, currently have no access to electricity, and a billion more have only an unreliable supply. Of the people without electricity, 85% live in rural areas or on the fringes of cities. The United Nations estimates that an average of $35 billion-40 billion a year needs to be invested until 2030 so everyone on the planet can cook, heat and light their homes and have the energy for productive uses such as schooling. At the current rate of investment, however, the number of “energy poor” people will barely budge, and 16% of the world’s population will still have no electricity by 2030, according to the International Energy Agency.

What is a Perovskite structure ?

Perovskite structures work well as the light-harvesting active layer of a solar cell because they absorb light efficiently but are much cheaper than silicon. Perovskite, is a mineral found in the earth, is composed of calcium, titanium and oxygen in a specific molecular arrangement. Materials with that same crystal structure are called perovskite structures.

What is the difference with standard solar cells ?

This material has several key features. First, it is completely inorganic. This is an important shift because organic components are usually not thermostable and degrade under heat. Since solar cells can get very hot in the sun, heat stability is crucial. By replacing the organic parts with inorganic materials, the researchers made the perovskite solar cells much more stable. "The solar cells are almost unchanged after exposure to light for 300 hours"

What is the goal of VPS?

The goal of the group is to engineer at molecular level novel panchromatic sensitizers and functionalized hole-transporting materials to achieve power conversion efficiency (PCE) surpassing 23%. Because many chemical combinations result in a perovskite crystal structure, and each of them has different optical properties, choosing the chemistry of a cell also means choosing what part of the spectrum it absorbs, this could push efficiency levels in the future up to around 36%. It may be possible to manufacture also a panel that is 30% efficient using standard solar cells in combination with perovskites.



TEL: +41 22 552 62 26

rue de la Dent-Blanche 18
Case Postale 1180
1951 Sion, Valais