Kan utnyttjande av kvantfluktuationer leda till mer effektiva solpaneler?

If scientists are correct, the world may be on the verge of a climate crisis.  With that being the case, something must be done sooner rather than later to address the issue.  For many, the low-hanging fruit to battling climate change remains a transition away from our reliance on fossil fuels as a source of energy towards more sustainable options like hydro, wind, geothermal, and solar.  However, for this to truly occur, a concerted effort must be made to advance the technology behind these alternatives.  Thankfully, researchers are hard at work already, with multiple recent studies pointing to a bright future for photovoltaic cells, which make solar energy harvesting possible.

Bowtie-resonatorer

One of these aforementioned studies has successfully outlined a future in which, through reliance on quantum fluctuations, ‘bowtie resonators’ can potentially self-manufacture.

Bowtie-resonatorer är en typ av struktur som är avsedd att användas i nästa generations fotovoltaiska celler, byggda med målet att fånga ljus i ett inneslutet tomrum.  Syftet är att maximera kontakttiden mellan det fångade ljuset och det medium som används för att överföra/fånga energi.  Intressant nog får bowtie-resonatorer sitt namn på grund av deras form som liknar en fluga.

Typically, in the absence of leakage, the smaller the resonator, the more effective it is at trapping light – leading to higher efficiency and energy capture.  Unfortunately, we have reached a point in time where traditional manufacturing techniques have almost been maximized.  This is where the study comes in, which looked to leverage quantum fluctuations that result in the fundamental forces known as the,

• Casimir effect
• Van der Waals forces

The purpose of this was to essentially guide the self-manufacturing of a resonator far smaller than is currently possible at scale.  The result was a significant and successful advancement in semiconductor device manufacturing, as the team was able to leverage the Casimir-van der Waals forces for ‘deterministic self-assembly’ of suspended silicon nanostructures and the successful creation of a nanoscopic resonator void.

Simply put – rather than attempting to build a resonator at such a small scale, the team built two halves and relied on quantum fluctuations to ‘fuse’ them together when placed in extremely close proximity to one another.  The paper indicates that “By contrast, planar semiconductor technology has had an immense technological impact, owing to its inherent scalability, yet it seems unable to reach the atomic dimensions enabled by self-assembly.”

Vad betyder det?

The implications of this technology are far-reaching, with potential applications across various fields. The paper elaborates on this, stating the following.

“While our work showcases the self-assembly of photonic cavities with few- to sub-nanometre confinement, our method may be applied in a much broader field of research and technology, for example, solid-state nanopore sequencing, nanogap quantum tunnelling electrodes or ultra-high-quality shadow masks for superconducting quantum electronic devices.

More generally, our work opens perspectives for exploring new regimes of photonics, electronics and mechanics at atomic scales while at the same time enabling scalable and self-aligned integration with large-scale chip architectures.”

The self-assembled waveguide-coupled cavity is particularly interesting with regard to enhanced light-matter interaction, potentially enabling the operation of devices at single-photon levels and facilitating new levels of efficiency not yet seen in photovoltaic cells.

Bakkontakt-fotovoltaiska celler

Notably, this is not the only potentially game-changing advancement in recent weeks surrounding photovoltaic cells.  Researchers at the University of Ottawa (U of O) successfully manufactured the “…first back-contact micrometric photovoltaic cells’.

Källa: www.sciencedirect.com/science/article/pii/S2666386423005325?via%3Dihub#abs0015

Essentially, this is a novel manufacturing technique that greatly reduces the ‘shadowing effect’ in a photovoltaic cell by repositioning electrical contacts onto its backside.  This means that the energy-gathering medium utilized is able to boast more surface area, which captured light can interact with.  This approach also allows for significant miniaturization of the cells.  All of which means greater efficiency and cost-effectiveness.

Alternativa tillämpningar

Interestingly, these discussed breakthroughs are important for more than just harnessing solar energy.  They may also potentially point to a path forward for nanotechnology at large by demonstrating the feasibility of leveraging quantum fluctuations and fundamental forces like the Casimir effect and Van der Waals forces.

Directed self-manufacturing materials would open a new realm of possibilities in material science that would profoundly affect almost every industry.  This means lighter and stronger building materials, miniaturized electronics, more effective medicines, targeted drug deliveries, and more.

The bottom line is that nanotechnology may one day fundamentally transform these industries, making it a particularly captivating and promising area of scientific and technological exploration.  However, it is important to recognize that a directed, self-manufactured bowtie resonator is just one step out of a marathon.

Branschaktörer

While it may be some years before we see self-assembling bowtie resonators and back-contact cells used in real-world applications, these are the types of innovative advancements that will be needed if we expect to avoid, or at least mitigate, the potential climate crisis we are already facing.  With that in mind, the following are a few publicly traded companies heavily involved in the growth of the solar industry and the technology that makes it possible.

*Figures provided below were accurate at the time of writing and are subject to change.  Any potential investor should verify metrics*

1. NextEra Energy Resources

(NEE )

NextEra Energy Resources är Nordamerikas främsta renenergiföretag och ledande inom produktion av vind- och solenergi.  Företaget utvecklar, bygger och driver elkraftsprojekt, inklusive mer än 150 vind- och solenergi‑centra i 26 delstater i USA och fyra provinser i Kanada, och genererar över 17 000 megawatt vind‑ och solenergi

2.  First Solar

(FSLR )

First Solar designar och tillverkar solkraftsystem och solmoduler med tunnfilmshalvledarteknik.  Företaget erbjuder också stödjande tjänster såsom finansiering, konstruktion, underhåll och återvinning av paneler i slutet av deras livslängd

3. SolarEdge Technologies

(SEDG )

SolarEdge Technologies är en global ledare inom smart energiteknik. Företaget erbjuder lösningar för fotovoltaik, lagring, laddning av elfordon, batterier, avbrottsfri strömförsörjning och nätverkstjänster.  Företaget är känt för sin SolarEdge DC‑optimerade växelriktarlösning, som maximerar energiproduktionen samtidigt som den minskar kostnaden för energi som produceras av fotovoltaiska system

Avslutande tankar

The advancements in photovoltaic technology, particularly the development of self-assembling bowtie resonators and back-contact photovoltaic cells, mark a significant stride in addressing the urgent challenges of climate change.  These innovations represent more than scientific progress; they are critical steps toward realizing a sustainable energy future.

As these technologies move closer to widespread adoption, they hold the promise of making solar power more efficient, cost-effective, and accessible, thereby accelerating the transition away from fossil fuels.  This progress in solar technology not only aligns with environmental goals but also underscores the potential of renewable energy to become a dominant, practical energy source in the near future.