Technology

A research team from Columbia University has designed organic molecules that can produce excitons with a longer lifecycle than inorganic equivalents. The excitons have the potential to amplify the amount of electricity generated by the photons a solar cell absorbs.

A German research team claims to have created a new visualization technique it says can enable detailed mapping of the energetic landscapes of organic PV cells on a nano scale. The technique could lead to organic cells with reduced power losses.

The researchers have developed a new manufacturing process by using an ultra-thin absorbing layer made of 205-nanometer-thick gallium arsenide (GaAs) and a nanostructured back mirror.

A research team from Russia’s institutes NUST MISIS and IPCE RAS, and Italy’s University of Rome Tor Vergata, have applied an additional layer of p-type copper iodide semiconductor between perovskite and the hole-transport NiO layer of the cell. According to the scientists, this inorganic material is more accessible and easy-to-use.

Doping perovksite solar cells with potassium is said to eliminate interface trapping defects and mobile ion migration. ‘Hysteresis suppression’ is key for more efficient cells based on the promising material.

The back-contact solar cell is said to have a conversion efficiency of around 7%. According to researchers, the cell design includes the removal of expensive transparent conductive oxides.

A U.S.-Chinese research team has discovered that carbonyl groups in caffeine can increase the efficiency of perovskite solar cells from 17% to 20%. The peculiar molecular structure of caffeine is said to be a good match for the precursors of perovskite material compounds.

The Commonwealth Scientific and Industrial Research Organisation (CSIRO) and Adelaide-based laser supplier Lastek are developing equipment and procedures to accurately measure the performance of multi-junction solar cells with the help of an LED-based solar simulator.

A European research team working on the EU-funded EURAMET ENG55 “PhotoClass” project has taken a step toward standardizing the measurement of the relative temperature dependence of the short-circuit current in different PV devices, although it applied completely different approaches.

Giving an update on the country’s renewable energy future, Malaysian Environment Minister Yeo Bee Yin said that the government is looking into P2P energy trading schemes and virtual net metering to expand solar uptake. On the residential side, a recent government-led communications push has lifted installation numbers over the last few months.