Scientists Just Broke the Solar Power Limit Everyone Thought Was Absolute

[erronis]

https://scitechdaily.com/scientists-just-broke-the-solar-power-limit-everyone-thought-was-absolute/

A new "energy-multiplying" solar breakthrough could push efficiency beyond 100% and transform how we capture sunlight.

I'm sure the "beyond 100%" statement will raise a couple of eyebrows. And I know at least one DUer who would be questioning this.

Solar energy is widely seen as a key tool in reducing reliance on fossil fuels and slowing climate change. The Sun delivers a vast amount of energy to Earth every second, but today's solar cells can only capture a small portion of it. This limitation comes from a so-called "physical ceiling" that has long been considered unavoidable.

Breakthrough Spin-Flip Technology Boosts Solar Efficiency

In a study published today (March 25) in the Journal of the American Chemical Society, researchers from Kyushu University in Japan, working with collaborators at Johannes Gutenberg University (JGU) Mainz in Germany, introduced a new approach to overcome this barrier. They used a molybdenum-based metal complex known as a "spin-flip" emitter to capture extra energy through singlet fission (SF), often described as a "dream technology" for improving light conversion.

This method achieved an energy conversion efficiency of about 130%, exceeding the traditional 100% limit and pointing toward more powerful future solar cells.

. . .

Using Singlet Fission To Multiply Energy

"We have two main strategies to break through this limit," says Yoichi Sasaki, Associate Professor at Kyushu University's Faculty of Engineering. "One is to convert lower-energy infrared photons into higher-energy visible photons. The other, what we explore here, is to use SF to generate two excitons from a single exciton photon."

. . .

Reference: "Exploring Spin-State Selective Harvesting Pathways from Singlet Fission Dimers to a Near-Infrared Emissive Spin-Flip Emitter" by Percy Gonzalo Sifuentes-Samanamud, Adrian Sauer, Aki Masaoka, Yuta Sawada, Yuya Watanabe, Ilias Papadopoulos, Katja Heinze, Yoichi Sasaki and Nobuo Kimizuka, 25 March 2026, Journal of the American Chemical Society.
DOI: 10.1021/jacs.5c20500

[dlk]

1. Wonderful news!

Thanks for sharing.

[Maninacan]

2. Efficiency

I do not understand the numbers here. in The early 1970s cells were at 2-3% efficiency and 6-8% in the lab. Theoretical limit then was 21 or 27% as i recall. The cells on my unit are about 21%. But this sounds great!

[BeneteauBum]

9. I read where a new record of 30% efficiency was just attained

Can’t remember the source but I think it was a European lab that accomplished it.

Peace ☮️

[LearnedHand]

3. It's definitely a clickbait-y statement

I’m pretty sure this advancement can’t violate the laws of physics. I’m struggling to understand how they mean something other than they think they can more than double the efficiency of sunlight capture, especially in the lower-light photon range.

[erronis]

4. That appears to be the basis for their claims - improvements in capture of wavelengths not previously handled.

[progressoid]

12. clickbait-y is an understatement.

But, hey, laws are meant to be broken. Am I right?

I mean if Trump can break all the laws he wants, why can't scientists break the second law of thermodynamics?

[Alpeduez21]

22. Haha!

[Gore1FL]

29. That isn't what they are claiming.

They are not producing or claiming to produce 130% of the energy going into it.

[Gore1FL]

28. It's 130% of what they previously thought possible.

They are not capturing 130% of the energy; they would be physics -breaking.
Achieving 130% of what was once thought possible is simply an advancement of the technology.

[usonian]

5. Paper is paywalled. Article above doesn't even give a link.

https://pubs.acs.org/doi/10.1021/jacs.5c20500

Abstract only:

Singlet fission (SF), a photophysical process generating two triplet excitons from one singlet exciton, has the potential to boost efficiency in photovoltaics and organic light-emitting diodes. Previous studies on energy-level control and intermolecular interactions have identified key factors for maximizing the efficiency of the initial SF process. However, in isothermic/endothermic SF systems, such as tetracene derivatives, the subsequent sensitization process becomes less efficient in the presence of a competing Förster resonance energy transfer (FRET) process. Here, we demonstrate that a molybdenum-based near-infrared light-emitting spin-flip emitter serves as a triplet-selective energy acceptor from triplet states of tetracene-based dimers generated by SF. The large energy gap existing between the spin-allowed transitions and the luminescent spin-flip transition of the molybdenum complex allowed efficient exothermic triplet energy transfer (TET) to the spin-flip excited doublet state of the complex while circumventing the FRET from the initially formed tetracene singlet state to the high-energy spin-allowed states of the complex. The quantum yields of the doublet state formation of the molybdenum complex by tetracene-based SF dimers with phenylene, 2,5-methylphenylene, and p-terphenylene bridging units were quantified to be 112 ± 6%, 132 ± 2%, and 128 ± 4%, respectively, in solution. The drop of fluorescence lifetimes of the SF dimers at high concentrations of the molybdenum complex implies energy transfer from exchange-coupled triplet pairs, highlighting the importance of controlling exchange interaction and triplet pair recombination. This work represents a significant step toward developing exciton/photon amplification materials by combining SF materials with transition-metal complexes, advancing the application of SF beyond conventional limitations.
© 2026 American Chemical Society

Some of the details in Japanese (PDF)
https://www-kyushu--u-ac-jp.translate.goog/f/65181/26_0325_01.pdf?_x_tr_sl=en&_x_tr_tl=es&_x_tr_hl=en-US&_x_tr_pto=wapp
Does anyone know how to get English out of this? Scraping is below.

Simple press release in English (PDF)
https://www.kyushu-u.ac.jp/f/65040/20260312_Sasaki_HP.pdf


Text of paper in English.
https://pastebin.com/raw/qDQk1ev9
Figures

[erronis]

6. Yeah - I tried briefly to find a non-paywalled version of the paper but only found a bunch of references

similar to what you've uncovered.

Thanks for checking.

[erronis]

8. Here you go. The PDF was on the JACS site. Can't say I understand any of it, so please verify.

https://pubs.acs.org/doi/suppl/10.1021/jacs.5c20500/suppl_file/ja5c20500_si_001.pdf

[usonian]

10. That's the supporting information. They give that suff away. Thanks for the efforts!

Appreciated.

[NNadir]

25. As usual, the "percent talk" is taken completely out of context. From the full paper, to which I have access:

Notably, triplet yields of up to 200% have been reported in crystals and covalently conjugated dimers, (14−25) and integration of the SF materials onto solar cell devices has been demonstrated to exceed 100% total exciton yield. (26−31) Another promising strategy to exploit the SF process is to convert the energy of separated triplets to photoluminescence (PL), thereby amplifying photons. (32) Triplet sensitization to emissive materials also improves the exciton generation efficiency of near-infrared (NIR) light-emitting diodes, (33) highlighting the broad potential applications of SF in optoelectronic fields.

This is in the first paragraphs of the paper and it refers to exciton yield. It's excitons, not thermodynamic energy recovery.

On inspection, while this claim will produce oodles of wishful thinking, the issue will do absolutely zero to address the environmental, economic and practical limitations of this technology, even if were entirely possible to industrialize this benchtop work.

These are land use, material use, the well known but often ignored reality that energy demand and availability are not linked in technologies dependent on the weather and the time of day, etc.

Solar energy is not sustainable, no matter what chemistry and physics are involved.

Figure 4 in the full paper shows the (very scary) chemistry involved:



These structures are polyaromatic hydrocarbons, powerful carcinogens that are constituents of air pollution and other chemical pollutants associated with petroleum and coal. They are decidedly not synthetically accessible on an industrial scale I would think.

It's a little late for wishful thinking. Solar energy will never be as clean nor as sustainable as nuclear energy, not in this form, not in any form.

It's a fantasy that should be allowed to die a deserved death.

[erronis]

26. I was relying on you to add your knowledgeable perspective. Thanks.

[OldBaldy1701E]

7. And, some energy company will buy it and we will never see or hear of it again.

And, if they can't, they will just outlaw it here in the states as well as anywhere else they have a stranglehold on their energy use.

[AZ8theist]

21. Considering that Doturd is using $1 BILLION of our tax dollars to stop an off-shore wind farm...

..your statement is perfectly valid.

Never ceases to amaze me how backwards stupid Donald Trump is. ALWAYS.

Make America STUPID Again should be their slogan.

[twodogsbarking]

11. Thanks for the post. Solar could be integrated into design of buildings and other things.

New technology could substantially reduce the need for oil. That is why the technology is slow. In my opinion. I wonder how cheap gas would be if the demand fell off by even ten percent. Economics.

[Maninacan]

14. 10% gas

We could make gas demand drop 10% overnight by driving slower.

[quakerboy]

18. I mean, existing technology could do that

If people were willing to use it/could afford it.

Questions I would have: Is mass manufacture of this possible and how does it compare to the manufacture of current solar panels in cost/effort/materials? And what is the real world output of a similarly sized panel as compared to a current standard solar panel?

[aggiesal]

13. Imagine if this technology is eventually implemented ...

we can build them into car roofs and we'd never have to stop for electricity charge up's.
Except for cloudy/raining/snow days.

[Maninacan]

16. Efficiency

Would be possible with a very efficient car. Too many cars have excessive power and other features which hurt economy.

[Trueblue Texan]

15. Imagine if the tack and blacksmith industries had done what the fossil fuel industry...

has done to prevent their businesses from becoming irrelevant ... There would be horseshit everywhere the same way we have pollution from fossil fuels everywhere.

This story sounds too good to be true, but that bias may be a result of living in a fossil fuel mindset for so long. And even if it's not too good to be true, will the fossil fuel industry ever allow such new technologies to become reality?

[Zelda_Orchid]

17. But solar power isn't feasible...

(from 1978)

[IbogaProject]

19. The % reported was "Quantum Yield" which isn't solar conversion efficiency

I met some one who had inherated some solar patents and research. Those were based on rectennas, and they were theoretically able to pull more energy by being tuned to more than one frequency.

[0rganism]

20. I'm sure Chinese technologists will fully utilize this advance

Us? Not so much, but hey oil's cheap and reliable with absolutely no externalities or long-term consequences whatsoever, right? /s

[Exp]

23. Excellent! nt

[LudwigPastorius]

24. Why, just the other day a fellow behind the dumpster at my local 7-11 was trying to sell me stock in a molybdenum mine.

hmm...gotta find that guy...

[hunter]

27. If solar panels were as cheap as cardboard and "130% efficient..."

... we wouldn't be any closer to to solving our fossil fuel problem.

The industrial machine that supports more than 8 billion people on this planet requires reliable, continuous, high density energy resources.

Solar energy is not that.