Europe Does Not Scale

I. A Headline That Must Be Read Differently

In March 2026, a Swiss research team published a new record for the perovskite–silicon multi-junction solar cell in Nature: 30.02 per cent certified efficiency. The trade press reported it as a breakthrough. On 25 May, ingenieur.de wrote of a mass market beginning to open. The statement is true — but not in the sense it wants to be understood. The mass market will open. It will not open in Europe.

The situation into which the Swiss record falls is not that of a technological pioneer phase. It is that of an industry which has long been scaling — predominantly not where the research takes place. Anyone who reads the article soberly sees this. Anyone who reads it as a success story misses something that has become a pattern over the past two decades and is particularly visible in photovoltaics.

II. What the Swiss Researchers Have Achieved

The EPFL Lausanne and the Centre Suisse d'Electronique et de Microtechnique described, in Nature on 17 March, a three-layer solar cell on fifty-four square centimetres. The architecture is conceptually elegant: silicon at the bottom for long-wavelength light, a perovskite layer with a medium bandgap for the green-yellow range, a perovskite layer with a wide bandgap on top for short-wavelength light. Three technical innovations carry the record: an additive that regulates crystallisation of the top layer, a three-step manufacturing process for the middle cell, silicon-oxide nanoparticles as an internal light reflector.

Telling for the situation is the certifying institution. The Swiss research achievement was certified by the Shanghai Institute of Microsystem and Information Technology. A Western flagship result has its credentials issued in China, because that is where the certification infrastructure now sits. The previous record of 27.1 per cent was held by the National University of Singapore. The academic front line runs between Singapore, Shanghai, Lausanne — three points on a map that is no longer the old one.

III. Who Actually Scales

The Chinese top tier is already past what the EPFL has reached. LONGi Green Energy holds the NREL-certified world record for the tandem cell at 34.85 per cent, from April 2025. On a large-area cell of 260.9 square centimetres — that is, an industrially relevant format, no longer a laboratory postage stamp — LONGi reaches 33 per cent. LONGi modules sit at certified 30.1 per cent. Trina Solar in June 2025 presented a module with 30.6 per cent and 829 watts, later raised to 841.5 watts — the first manufacturer worldwide to clear 30 per cent on a module. Jinko Solar targets 34 per cent cell efficiency for 2026. Aiko Solar leads the patent portfolio for perovskite tandem with twelve relevant patents among Chinese manufacturers.

These actors do not only do research. They produce. GCL completed a one-gigawatt facility for tandem cells in June 2024. UtmoLight is planning gigawatt-scale capacity. Ren Shuo Optoelectronics has two 500-megawatt lines under construction, with start-up announced before spring 2026. Xianna Photovoltaic likewise has two 500-megawatt lines. In the United States, First Solar is building a sixth factory in South Carolina with 3.7 gigawatts of annual capacity for the second half of 2026; in February 2026 First Solar signed a licensing agreement with Oxford PV. In Korea, Hanwha Qcells plans mass production from the first half of 2027.

In Europe, things look different. Enel, through its subsidiary 3Sun, is building a gigafactory with 3 gigawatts of annual capacity in Catania, Sicily — the only European installation in the league of the global players. Oxford PV in Brandenburg an der Havel is the only own production of perovskite tandem modules in Europe, currently with a pilot capacity of one hundred megawatts. The planned gigawatt factory was most recently postponed to end of 2027 or beginning of 2028. CEO David Ward targets a 20-year module lifetime by 2028 — notably as a goal, not as a given property. Today the modules last less than the twenty-five years which silicon modules guarantee.

IV. The Turn to Licensing

Oxford PV has changed its strategy. Instead of building gigawatt capacities of its own, the company licenses its patents to the global manufacturers. Trina Solar has concluded an exclusive Oxford PV licence for the Chinese market. First Solar signed a similar licensing deal in February 2026. CEO Ward expects increased licensing activity in 2026 as the main business.

This is the strategy of a company that has recognised its own scaling as unrealistic and is securing an income from the exploitation of its protective rights. Economically that is not unreasonable. Structurally it is defeat. Those who own the patents but not the gigafactories live on the substance of their invention until the patents expire. Those who own the gigafactories live on ongoing production over decades. The unequal value of these two positions will become visible in the balance sheets over the next ten years.

V. The Unresolved Problems

Three technical hurdles are not solved, and they will determine the speed of scaling, not its direction. The first is stability. Standard silicon modules today last twenty-five years with performance guarantees promising eighty per cent of original output after that time. Perovskite materials degrade significantly faster under humidity, oxygen, UV radiation and temperature. Hydration allows the inner perovskite to disintegrate gradually; oxygen oxidises particularly the titanium-dioxide layers. Long field-data records do not yet exist — the first commercial modules have been in the field for less than two years.

The second hurdle is lead toxicity. The most efficient perovskite materials contain lead in the crystal structure. Damage to a module — hail, storm damage, fire, broken glass — can lead to lead leaching into soil, air and groundwater. Solutions exist: self-healing polymers, ECR protocols, recycling structures. But lead-free perovskites based on tin, antimony, bismuth or germanium currently have significantly lower efficiency and worse stability. A complete replacement of lead is not in sight for the foreseeable future. In Europe, where regulation is sharper than in China or the US, this will be a delaying factor — and thus another locational disadvantage.

The third hurdle is area scaling. What works in the laboratory on one square centimetre does not automatically work on one square metre. The EPFL cell has fifty-four square centimetres — an intermediate value between laboratory and module. LONGi has made the jump to 260.9 square centimetres, which is the currently industry-relevant scale. A full photovoltaic module has about two square metres. Here EPFL research lags by orders of magnitude — not in the laboratory, but in the production capability connected to the laboratory.

VI. The Structural Situation

The question who will scale is not a technical question. It is a question of Europe's industrial self-understanding, which has failed in two directions over the past three decades. First, by weakening its industrial base through outsourcing to low-cost countries — a policy praised as economic reason and strategically catastrophic. Second, by understanding itself preferably as a regulating actor whose most important contributions to the world lie in regulations, not in products.

This situation is not specific to perovskite. It is Europe's situation in almost every technological frontline since about 2010. The mRNA vaccines were invented in Mainz — mass production runs in the US and India. Lithium-ion battery technology was developed in Oxford and Tübingen — ninety per cent of production runs in China, Korea and Japan. Solar-cell mass production was built up in Germany, Q-Cells in Bitterfeld-Wolfen, SolarWorld in Bonn, and collapsed almost completely between 2012 and 2018 after Chinese manufacturers had driven down prices with state-backed overcapacities. Today, more than eighty per cent of the world's solar modules come from China.

The consequence is an irony that cannot be resolved morally. The EPFL can hold the record. The certification takes place in Shanghai. LONGi engineers will read the Nature article. The additive method will be reproduced in Hangzhou, with variations that bypass patents or establish new ones. In eighteen to twenty-four months, a Chinese module with the EPFL-inspired architecture will be on the market, at a price that relativises European competition into irrelevance.

This is not theft. It is the normal functioning of a globalised world of science and industry, in which academic publications are public goods and industrial production facilities are private property. Whoever has the production infrastructure can convert the published into products. Whoever does not, cannot. The EPFL does not have the infrastructure. The CSEM does not have it. Oxford PV has it at pilot scale and has switched to licensing.

VII. What Scaling Actually Costs

A modern photovoltaic gigafactory with one to three gigawatts of annual capacity costs between half a billion and two billion euros to build. Add operating costs, personnel costs, energy costs, material costs. The payback period of these investments is seven to fifteen years, depending on market prices and political environment.

Such investments worldwide are made only by actors with the corresponding capital base and industrial experience in mass production. In China, that is roughly twelve companies with market capitalisations between five and fifty billion dollars. In the US, First Solar with about twenty billion dollars. In Korea, Hanwha Qcells as part of the Hanwha conglomerate. In Europe, Enel, whose photovoltaic activities make up only a small part of its energy business.

A research institution like the EPFL has an annual budget of around one billion Swiss francs for the entire university, the vast majority of which is for teaching and basic research. The CSEM has about eighty million francs of annual turnover. These orders of magnitude are not in the same league as the gigafactory investments that decide the game. This is not a question of will. It is a question of industrial infrastructure that is missing in Europe and cannot be built up in five years through funding programmes.

VIII. What Remains

The situation is not hopeless. It is sober. Three possibilities remain open which do not decide the main race but can make meaningful contributions.

The first is niche application. Building-integrated photovoltaics, where requirements are different from utility-scale installations — smaller volumes, higher customisation, aesthetic and integrative functions. Here smaller European actors can play a role, because Chinese mass producers structurally do not serve this niche well. The second is specialised partial research — into stability, encapsulation, local recycling, lead-free variants — a strategy that Oxford PV has chosen and which on a smaller scale is also open to German research institutions. The third is the training and demonstration function: qualifying skilled workers needed in the coming industry, operating pilot plants where the technology's functioning becomes visible.

What Europe cannot do under current conditions is mass production. That is the sober situation. Anyone who portrays it otherwise risks losing strategic clarity through political self-reassurance. The energy transition will happen. The question is no longer whether, but where the modules are produced that carry it. To this question, Europe today has no answer of its own.

The Swiss research achievement of March 2026 is an impressive academic work. It will enter the literature. It will leave its traces in Chinese, American and Korean production facilities. It will not become mass-produced modules in any Swiss or European gigafactory. This is the situation that this series has been describing since its first contribution — a megamachine that has distributed its substrates such that value creation arises where production runs, and not where research is written.