Researchers use dopant-additive synergism to develop perovskite solar module with efficiency of 23.3%

Researchers from EPFL, Soochow University, Chinese Academy of Sciences, Lomonosov Moscow State University, Luxembourg Institute of Science and Technology (LIST), Julius Maximilian University of Würzburg, Toin University of Yokohama, Southern University of Science and Technology, Xi’an Jiaotong University, North China Electric Power University and Toyota Motor Europe recently developed a solar panel relying on EPFL's record-breaking 25.32%-efficient 2D/3D perovskite solar cells unveiled in July 2023.

The group's research demonstrates a larger surface area of 27.22 cm2, achieving an impressive efficiency of 23.3%. In the paper, the scientists explain that the module's high efficiency was achieved thanks to a synergistic dopant-additive combination strategy aimed to improve the cell absorber's uniformity and crystallinity. They used, in particular, methylammonium chloride (MACl) as a dopant and a Lewis-basic ionic liquid known as 1,3-bis(cyanomethyl)imidazolium chloride ([Bcmim]Cl) as an additive.

Read the full story Posted: May 11,2024

Researchers report an optofluidic crystallithography method for directed growth of single-crystalline halide perovskites

Crystallization, the phenomenon that transforms disordered atoms or molecules into ordered solid-state structures, is an immensely studied process. However, while researchers have made significant strides in controlling the nucleation of crystals from precursor solutions, directing their subsequent growth to form defect-free single crystals with tailored shapes has proven far more challenging. This limitation has been particularly problematic for materials like halide perovskites, where controlling the formation of defects results in better photoelectric properties. Conventional techniques like inverse temperature crystallization or antisolvent vapor-assisted crystallization allow some control over average growth conditions, but their ability to pattern arbitrary single-crystal geometries while suppressing defect formation has remained confined.

Now, researchers at Tsinghua University have demonstrated optofluidic crystallithography (OCL), a novel approach that leverages a laser as a precise "pen" to simultaneously control the shape and quality of single-crystal halide perovskites as they grow from solution at record speeds.

Read the full story Posted: May 10,2024

Researchers design tin-germanium-based perovskite solar cell with potential efficiency of up to 31.49%

Researchers from Malaysia have simulated a mixed cation solar cell based on a perovskite absorber integrating tin (Sn) and germanium (Ge) as mixed B cations. By modulating the perovskite layer thickness, they achieved an efficiency ranging of 24.25% - 31.49%.

Perovskite absorbers using mixed cations have the potential to improve stability, light absorption, and charge carrier mobility. A cations are used to control the bandgap and stability of the perovskite material, while B cations are intended to modify electrical and optical characteristics of perovskites. The scientists explained that using both elements in the B cation via “compositional engineering ” enables to reduce their respective defects and increase the cell performance, when compared to using each of them separately. Furthermore, the Ge atoms can replace Sn atoms in the perovskite crystal structure.

Read the full story Posted: May 09,2024

Researchers develop room-temperature-processed perovskite solar cells with >24% efficiency

Researchers at UC Santa Barbara, Pusan National University and Korea Electric Power Research Institute have introduced a simple approach to produce high-quality perovskite films at room temperature by precisely regulating the perovskite composition with the addition of an organic linker (oleylamine, OAm). This work aims to address the challenge presented by current processes for manufacturing PSCs - that tend to rely on high-temperature annealing and intricate post-treatments.

The team’s innovation not only simplified the production process but also increased the material’s efficiency from under 20% to 24.4%. The method enabled phase conversion to the stable α-phase without thermal annealing, as confirmed by in situ X-ray monitoring. The optimized device achieved impressive efficiencies of 23.2% (24.4% with an anti-reflective coating), surpassing efficiencies attained by previous room/low-temperature-processed PSCs. 

Read the full story Posted: May 08,2024

Halocell Energy enters MOU with Homerun Resources

Homerun Resources and Halocell Energy have announced that they executed a non-binding Memorandum of Understanding (MOU) that establishes that the Companies will collaborate to develop and produce high efficiency and stable outdoor Solar Glass / PSC solutions.

Under the terms of the MOU, Halocell and Homerun agree to provide technical assistance to each other to develop the best outdoor Solar Glass / PSC solutions.

Read the full story Posted: May 07,2024

Researchers develop crystalline 2D fullerene-based metal halide semiconductor for efficient and stable perovskite solar cells

Researchers from Wuhan University, University of South Florida, CNRS and Nanoneurosciences recently reported the first crystalline 2D Fullerene based Metal Halide Semiconductor, (C60-2NH3)Pb2I6.

Designing functionalized C60 adducts at the Spanopoulos Group at USF

According to the team, single crystal XRD studies elucidated the structure of the new material, while DFT calculations highlighted the strong contribution of C60-2NH3 to the electronic density of states of the conduction band of the material. Utilization of C60-2NH3 as an interlayer between a FA0.6MA0.4Pb0.7Sn0.3I3 perovskite and a C60 layer reportedly offered superior band energy alignment, reduced nonradiative recombination, and enhanced carrier mobility.

Read the full story Posted: May 06,2024

Researchers design dynamical self-rectifying memristors based on halide perovskite nanocrystals

Researchers from China's Shenzhen Campus of Sun Yat-sen University have reported a new type of two-terminal self-rectifying memristor that gets rid of asymmetric complex structures by using CsPbBr3 perovskite nanocrystals (NCs). The integration of rectifying effects with resistance switching in a self-rectifying memristor offers the opportunity to suppress the sneak current in high-density crossbar arrays for energy-efficient neuromorphic computing.

This study demonstrates the possibility of constructing controllable self-rectifying memristors without involving asymmetric complex structures, paving a new way for resolving the sneak current issue in crossbar arrays of memristors. 

Read the full story Posted: May 05,2024

Researchers achieve 3D printing of luminescent perovskite quantum dot–polymer architectures

Researchers from Ulsan National Institute of Science and Technology (UNIST), Korea Electrotechnology Research Institute (KERI) and Sungkyunkwan University (SKKU) recently developed a straightforward and effective method for producing 3D architectures of perovskite quantum dot (PQD)-encapsulated high-performance composites (PQD-HPCs) through direct-ink writing (DIW). 

Schematic of the direct-ink writing (DIW) approach of luminescent PQD–polymer architectures. Image from Advanced Functional Materials

Led by Professor Im Doo Jung from the Department of Mechanical Engineering at UNIST, the recent study introduced a cutting-edge one-stop perovskite quantum dot (PQD) additive manufacturing technology. This approach eliminates the need for heat treatment, allowing for the creation of complex 3D shapes with exceptional precision, including iconic landmarks like the Eiffel Tower.

Read the full story Posted: May 04,2024

Solaires and XLYNX team up to ‘unlock full potential of recycled light’

Solaires Enterprises and XLYNX Materials recently announced a collaboration which will focus on building efficient and stable perovskite solar cells to “unlock the full potential of recycled light”. 

The partnership between the two Canada-based companies aims to help engineer the future of solar energy, according to Dr. Sahar Sam, a cofounder of Solaires Enterprises. “Through collaboration with XLYNX Materials, we are one step closer to making solar energy even more sustainable, cost-effective, and accessible,” Sam stated. 

Read the full story Posted: May 03,2024

Toray Engineering to Ship Large Size Slot-die Coater for GW Perovskite Production Line

Toray Engineering says that it will ship large size slot-die coaters for an upcoming Gigawatt scale (GW) perovskite production line. The first shipment is scheduled in the second quarter of 2024.

This upcoming production line will be the world’s largest perovskite PV production line, with a glass size of over 2 meters in size. Toray plans to ship multiple large-scale (over 2 meter) slot-die coaters in 2024 for perovskite production.

Toray Engineering’s slot-die coaters have already been used worldwide in perovskite coating processes in several installations. The company reports that market and customer demand is on the rise, and several companies are planning to construct large-area perovskite production lines, with glasses over 2.4 meters in size. Toray Engineering has produced and sold over 800 large-size slot-die coater systems, and is the only company that has successfully produced and shipped large slot-die coaters.

Read the full story Posted: May 02,2024