Researchers at the Institut de Ciències Fotòniques (ICFO) have discovered a novel way to design solar panels that can dramatically increase their energy efficiency. Notably, while existing studies have focused on reducing how much solar energy is lost to heat, ICFO's research addresses another limiting factor: Boltzmann loss, or the energy lost to the light solar panels emit.

New research doesn't mean you'll be able to go out and buy a more capable solar panel tomorrow, of course, but considering the growing adoption of plug-in balcony solar panels in the US, improving the basics could go a long way. If it's possible to boost panel efficiency from the current theoretical limit of 33.16 percent (known as the Shockley-Queisser limit) to the roughly 43 percent the ICFO claims its new method would enable, we could see significant trickle-down benefits for consumer solar panels, which typically perform at 20 to 23 percent. This is far from the only recent breakthrough in solar panel tech in 2026, either: Chinese firm LONGi unveiled a solar cell with 35.5 percent efficiency in July and claimed the PV cell it uses is also theoretically capable of achieving 43 percent.

At their simplest, solar panels contain semiconducting material — most commonly crystalline silicon — that releases electrons when exposed to sunlight, creating an electric current. Unfortunately, some of that solar energy turns into heat or is re-emitted as light. Scientists have explored several methods to reduce thermal energy loss, including changing a panel's semiconductor, but the light component of the equation has so far been trickier to address.

Source link