Solar energy
Over the past four decades, solar energy has experienced a predictable evolutionary cycle: slow efficiency improvements, continuous cost reductions, and expansion of industrial scale. However, this cycle depends almost entirely on… crystalline siliconMagnesium, an expensive material to purify, rigid, heavy, and limited to flat shapes. This dependence is being shaken by a technology that until a few years ago was just a laboratory experiment: Photovoltaic perovskites printed in industrial roll-to-roll (R2R) processes.
The central point of this technology is not just to generate more energy per square meter, but change the entire manufacturing logic, allowing solar panels to be printed like newspapersOn flexible plastic films, ultra thin glass ou metallic substratesdrastically reducing production costs and expanding the possible uses of solar energy.
Perovskites are a family of materials with a type of crystal structure ABX₃, capable of absorbing light with high efficiency even in extremely thin layers. This characteristic allows the creation of photovoltaic devices with thickness up to a thousand times smaller that of a silicon cell, while maintaining high performance. The impact of this is significant:
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Institutions such as NREL (USA), Fraunhofer ISE (Germany) e Oxford PV (United Kingdom/Germany) They have already proven that the theoretical ceiling of perovskites surpasses that of silicon., and tandem cells (perovskite+silicon) surpassed 30% efficiencywhile commercial silicon modules stabilized between 20% and 23%.
The difference seems small, but in solar energy… Every 1% is a revolution. — even more so when associated with reducing industrial costs.
The term roll-to-roll (R2R) It is common in the printing, packaging, and plastic film industries. It refers to machines where a roll of raw material travels along a continuous production line, receiving successive layers like in a high-speed printing press.
Applied to photovoltaics, R2R allows the production of solar panels using processes such as:
Instead of melting and purifying silicon at temperatures exceeding 1.400°C, the R2R process works… close to room temperature, greatly reducing the energy cost of manufacturing.
O MIT Energy Initiative it is estimated that the potential reduction of CAPEX and OPEX This can lower the final cost per square meter, paving the way for panels with Price close to that of industrial coatings..
This difference is not marginal — it It changes the paradigm of solar energy..
Europe has become one of the industrial hubs for this technology. In 2021, the company Saule TechnologiesIn Poland, he installed what many consider to be the first urban facade with printed and flexible perovskite, pioneering commercial use in buildings (BIPV — Building Integrated Photovoltaics). Meanwhile:
Innovation has moved beyond academic theory and entered the industrial sphere.
The new photovoltaic route is not just a technological challenge, but a geostrategic dispute.
Today, the situation is as follows:
This fragmentation creates an environment in which intellectual property e chemical chains They become more important than silicon and melting furnaces.
More than just replacing conventional panels, printed perovskite opens up unprecedented markets, such as:
These are markets where silicon has never been able to compete, due to its rigidity, weight, and visual intrusion. In this sense, perovskite is not just competing for efficiency—it’s competing for ubiquity.
Every technological revolution has an “Achilles’ heel.” In the case of perovskite, it has a name: stability. The main challenges are sensitivity to humidity, UV degradation, thermal instability above 80–100°C, and undesirable chemical reactions during its lifespan.
Therefore, laboratories and manufacturers are investing heavily in multilayer encapsulation, organic/inorganic barriers, and new formulations that replace more unstable halides. Efficiency, on the other hand, has already proven to be viable:
The dispute now is over reliability engineeringNot efficiency physics.
If the 20th-century energy transition was based on oil and enginesThe 21st-century version is based on electricity and advanced materials.
The R2R printed perovskite represents a new industrynot just a new product; a new chemical chainnot just a new cell; a new factory infrastructure, not just a new panel.
This type of change displaces investments, requires reindustrialization and provoke geopolitical rearrangements — exactly as happened with semiconductors.
Silicon isn’t going away—it still supports more than 90% of the global photovoltaic market and is rapidly advancing with technologies like TOPCon and HJT. But R2R printed perovskite points to a different kind of future, where solar energy is flexible, cheap, invisible, portable, and ubiquitous.
If the stability barrier is overcome, the next decade could witness something unprecedented: solar energy being produced as plastic packaging, driving a world where buildings, clothing, vehicles, furniture, and devices will be components of energy infrastructure.
The question is no longer whether this will happen, but who will control intellectual property and industrial production when the market changes. And when that happens, the oil of the 21st century could be a plastic film that generates energy.
Débora Araújo is a writer at Click Petróleo e Gás, with over two years of experience in content production and over a thousand published articles on technology, the job market, geopolitics, industry, construction, curiosities, and other topics. Her focus is to produce accessible, well-researched content of public interest. Suggestions, corrections, or messages can be sent to contato.deboraaraujo.news@gmail.com
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