Efficiency

Researchers develop highly efficient p-i-n perovskite solar cells while tackling the issue of endurance to temperature variations

Researchers from Helmholtz-Zentrum Berlin (HZB), Chinese Academy of Sciences (CAS), Swansea University, University of Stuttgart, Henan University, University of Naples Federico II, Queen Mary University of London and Soochow University have investigated a chemical variation that significantly improves the stability of the perovskite thin film in different solar cell architectures, among them the p-i-n architecture.

Daily temperature variations induce phase transitions and lattice strains in halide perovskites, challenging their stability in solar cells. The international team in this work set out to address this issue and improve the stability of PSCs in the face of these changes. 

Read the full story Posted: Jan 28,2023

Researchers estimate lifetime and efficiency required for PSCs to become competitive for residential use

An international research group that included teams from Vrije Universiteit Amsterdam, University of Fribourg, the University of the Basque Country and the University of New South Wales has assessed the levels of efficiency and stability that perovskite solar cells (PSCs) have to achieve in order to become an economically viable technology to compete with crystalline silicon cells in the rooftop segment.

The scientists assessed the necessary lifetime (LT) of a perovskite module, which they defined as the time until a module has 80% of its initial efficiency, as a function of efficiencies to be competitive in the levelized cost of electricity (LCOE). They found that perovskite solar modules might need to provide 20% efficiency for at least 36 years, or 25% efficiency for a minimum of 21 years, if they want to compete with conventional PV panels.

Read the full story Posted: Jan 26,2023

EPFL-led team uses additives to improve the stability and efficiency of perovskite solar cells

A team of researchers, led by Professor Michael Grätzel at EPFL and Xiong Li at the Michael Grätzel Center for Mesoscopic Solar Cells in Wuhan (China), have developed a technique that addresses stability concerns of perovskite solar cells (PSCs) and increases their efficiency.

The researchers introduced a phosphonic acid-functionalized fullerene derivative into the charge-transporting layer of the PSC as a “grain boundary modulator”, which helps strengthen the perovskite crystal structure and increases the PSC’s resistance to environmental stressors like heat and moisture.

Read the full story Posted: Jan 22,2023

Researchers reach >28% efficiency with perovskite-silicon tandem PV cell with textured wafers

Scientists from Saudi Arabia’s King Abdullah University of Science and Technology (KAUST), Deutsches Elektronen-Synchrotron DESY, Academy of Sciences of the Czech Republic and Slovak Academy of Sciences have demonstrated a power conversion efficiency of 28.1% for a perovskite-silicon tandem solar cell based on textured silicon wafers.

Textured silicon wafers used in silicon solar cell manufacturing offer superior light trapping, which is a critical enabler for high-performance photovoltaics. The team explained that a similar optical benefit can be obtained in monolithic perovskite/silicon tandem solar cells, enhancing the current output of the silicon bottom cell. Yet, such complex silicon surfaces may affect the structural and optoelectronic properties of the overlying perovskite films.

Read the full story Posted: Jan 12,2023

Renshine Solar announces 29.0% efficiency for all-perovskite tandem solar cell

Chinese perovskite solar technology company Renshine Solar (Suzhou) has announced 29.0% steady-state power conversion efficiency of all-perovskite tandem solar cell developed in-house. The company now expects to exceed 30% in 2023.

Japan Electrical Safety and Environment Technology Laboratories (JET) has reportedly certified the efficiency claim that was reported for a designated area of 0.04888 cm².

Read the full story Posted: Jan 05,2023

EPFL team uses unique modulators to improve the efficiency and stability of perovskite solar cells

A team of researchers at EPFL have developed a method that improves both power conversion efficiency and stability of solar cells based on pure iodide as well as mixed-halide perovskites. The new method aslo suppresses halide phase segregation in the perovskite material. The research was carried out by the groups of Professors Michael Grätzel and Ursula Rothlisberger at EPFL and led by Dr Essa A. Alharbi and Dr Lukas Pfeifer.

The method treats perovskite solar cells with two alkylammonium halide modulators that work synergistically to improve solar cell performance. The modulators were used as passivators, compounds used to mitigate defects in perovskites, which are otherwise promoting the aforementioned degradation pathways.

Read the full story Posted: Dec 28,2022

Researchers develop a novel approach for stable wide-bandgap perovskite solar cells

Researchers at the National Renewable Energy Laboratory (NREL) and University of Toledo have developed a new approach to manufacturing perovskite solar cells.

Developing highly stable and efficient perovskites based on a rich mixture of bromine and iodine is considered critical for the creation of tandem solar cells. However, issues with the two elements separating under solar cell operational conditions, such as light and heat, limit the device voltage and operational stability. This challenge is often made worse by the ready defect formation associated with the rapid crystallization of bromine-rich perovskite chemistry with antisolvent processes.

Read the full story Posted: Dec 26,2022

Researchers demonstrate efficient and stable formamidinium–caesium perovskite solar cells and modules from lead acetate-based precursors

Researchers from Monash University, Wuhan University of Technology, CSIRO Manufacturing, The Melbourne Centre for Nanofabrication and Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory have demonstrated "the first effective use of lead acetate as a precursor in making formamidinium-caesium perovskite solar cells". This could lead to a new way of creating durable, efficient perovskite photovoltaics at industrial scale.

Members of Exciton Science, based at Monash University, were able to create perovskite solar cells with 21% efficiency, which they say are the best results ever recorded for a device made from a non-halide lead source.

Read the full story Posted: Dec 22,2022

Researchers develop new strategy to improve efficiency and stability of flexible perovskite solar cells

Researchers from Saule Research Institute, Saule Technologies, Centre for Hybrid and Organic Solar Energy (CHOSE), CNR-SCITEC, Istituto Italiano di Tecnologia (IIT), Wroclaw University of Science and Technology, Bydgoszcz University of Science and Technology and Poznan University of Technology have demonstrated an effective strategy to improve the technical aspects of flexible perovskite solar cells,  improving the reliability and efficiency values of these devices.

The team applies large organic ammonium molecules for modifying a buried interface between a hole-transporting layer (HTL) and perovskite-absorbing material. With the 4-fluorophenethylammonium iodide (FPEAI), they achieved 18.66% efficiency for the large-area (1 cm2) flexible solar cell, a significant improvement over the pristine device without modification.

Read the full story Posted: Dec 21,2022

HZB researchers reclaim efficiency record with 32.5% silicon/perovskite tandem solar cell

Researchers at Helmholtz-Zentrum Berlin (HZB) recently announced a new tandem solar cell that converts 32.5% of the incident solar radiation into electrical energy.

The certifying institute European Solar Test Installation (ESTI) in Italy measured the tandem cell and officially confirmed this value which is also included in the NREL chart of solar cell technologies, maintained by the National Renewable Energy Lab, USA.

Read the full story Posted: Dec 19,2022