Technology

A Norwegian company has developed a way to melt snow on modules to avoid excess weight on roofs and panels, especially on large commercial and industrial arrays. A control system measuring snow density is linked to DC power supply units to warm the panels.

Researchers from the United States have proposed a new electrode design for fractal solar panels that combines the typical aesthetic advantages of the technology with the efficiency of busbar design. The proposed pattern is based on the fractal tree structure known as H tree, or T-branching, which is a geometric shape consisting of a repeating pattern that resembles the letter H. The hybrid H-tree/busbar pattern showed power losses that are close to those of standard busbars.

US scientists claim to have discovered a membrane which could lead to cheaper large scale flow batteries. The material is an ion-selective, aqueous-compatible polymer with intrinsic microporosity known as AquaPIM and is said to have tunable thickness and high conductivity in aqueous electrolytes.

Dutch scientists are producing mesoporous titanium dioxide thin films at room temperature by using the papain enzyme in a dip‐coating procedure. This fully organic process could facilitate the development of cheaper, more efficient dye‐sensitized solar cells.

An Italian startup has developed a luminescent solar concentrator technology that can be integrated with active architectural elements and windows. The technology is based on nanoparticles known as chromophores, which decouple the absorption and light-emission processes, thanks to appropriate engineering. The company claims it has achieved a conversion efficiency of up to 3.2%, with a degree of transparency in the visible spectrum of around 80%.

South Korean scientists have produced an organic, hybrid-series tandem PV device that combines quantum dots and organic bulk heterojunction photoactive materials. They claim that the cell has the highest efficiency among all reported colloidal quantum dot cells, including single-junction devices and tandem devices.

France’s Liten organization said it raised efficiency more than 20% with improved thickness homogeneity of the perovskite and optimized composition of the n-type interfacial layer. The previous record of 16.9% was attained by the same research group early last year.

A U.S. research team has discovered that backsheets are most affected by cracking and degradation on inner layers, as such areas tend to become more rigid. The scientists have also discovered that degradation is accelerated by chemicals descending from the solar cells’ EVA encapsulant to the backsheets themselves.

Korean scientists have unveiled a colorless device made of silicon microwire composites. The enhanced light absorption of the cell, the researchers claim, is due to the re-absorption of light by the microwires, which also benefit from an enhanced electric field.

The device exhibited a small performance loss after a 400-hour thermal stability test at 85 degrees Celsius and after the same period under maximum power point tracking at 40 degrees Celsius, according to its developer. The cell was made by combining solution-processed, micrometer-thick perovskite top cells with fully-textured silicon heterojunction bottom cells.