Researchers from the University of Rome Tor Vergata, Hellenic Mediterranean University, Université Grenoble Alpes (CNRS), Halocell Europe, CHOSE, ENEA, 3SUN - Enel Green Power and BeDimensional have developed a scalable four-terminal (4T) perovskite/silicon tandem architecture that combines high efficiency, semi-transparency and real-world stability by engineering a field effect junction directly inside the perovskite absorber. 

a Layout of the semi-transparent 2D material-based PSMs. Each module is composed by 24 series-connected solar cells with an active area of 2.49 cm². The total active area is 60 cm² while the aperture area (comprising the interconnection areas) is about 63 cm². b Demonstrator 1 (DEM1) perovskite/Si tandem panel. Each building block is composed of four parallel-connected semi-transparent perovskite modules stacked above the M2 Si-HJT bifacial cell (provided by 3SUN). c, d Pictures of the front and back side of the laminated tandem DEM1. Image from: Nature Communications

The work targets industrially relevant, large-area modules compatible with standard silicon wafer dimensions and production lines, addressing key bottlenecks in the commercialization of perovskite/Si tandems such as scalability, efficiency loss on upscaling, and outdoor durability.

A research team, led by the Chinese Academy of Sciences (CAS), has developed a novel chemical polishing approach to improve the performance of perovskite/silicon tandem solar cells (PVSK/Si TSCs), achieving a power conversion efficiency (PCE) increase from 30.04% to 31.83%.

In conventional tandem devices fabricated using spin-coating techniques, the bottom crystalline silicon layer typically features sub-micron pyramid (SMP) textures. These pyramid structures, though essential for light trapping, produce deep V-shaped grooves between adjacent pyramids, which hinder substrate wettability and raise surface roughness. Such morphologies make it difficult to deposit uniform, defect-free perovskite films, ultimately limiting device efficiency. To address these issues, the team applied an isotropic etching-based chemical polishing process to smooth the V-shaped regions of the SMP texture. 

Researchers from Soochow University have conducted a comprehensive simulation study to clarify how pyramid-textured architectures influence the optical and electrical behavior of all-perovskite tandem solar cells (TSCs). With tunable bandgaps, low manufacturing cost, and strong optoelectronic properties, all-perovskite TSCs are among the most promising candidates for next-generation photovoltaics. However, their practical efficiency remains below the theoretical limit - mainly due to insufficient light management and reflection losses in planar designs.

Through a series of coupled optoelectronic simulations, the team examined four distinct textured configurations: a top texture on the wide-bandgap perovskite (WBG-PSK), a middle texture between WBG-PSK and narrow-bandgap perovskite (NBG-PSK), a rear texture beneath the NBG-PSK, and a fully textured design integrating all three. Each configuration was modeled using periodic pyramid patterns to explore how location and feature size impact light absorption and carrier generation.

Researchers from Bar-Ilan University, Israel; the Institute of Astronomy Space and Earth Science, India; Prabhat Kumar College, India; the University of Waterloo, Canada; the University of Goettingen, Germany; Sidho-Kanho-Birsha University, India; and the Indian Institute of Science, India have developed mini perovskite solar modules that combine competitive efficiency with over 1,300 hours of operational stability by engineering the buried hole-transport interface with reduced graphene oxide (r-GO). 

The work targets one of the main bottlenecks in perovskite photovoltaics - scaling from high-efficiency small cells to stable, larger-area modules - by systematically passivating the interface between a self-assembled monolayer (SAM)-based hole transport layer (HTL) and the perovskite absorber.

SEKISUI CHEMICAL and SEKISUI SOLAR FILM (SSF) have launched a film-type perovskite solar cell called "SOLAFIL". Aiming for commercialization in fiscal 2025, the companies have been working on the development and establishment of mass production technology. As a result, they have completed preparations for the commercialization of products and installation specifications targeting metal roofs with the establishment of manufacturing technology using existing equipment.

"SOLAFIL" will be provided to municipalities and businesses selected for the Ministry of the Environment's fiscal year 2025 public offering project "Support Project for the Introduction of Perovskite Solar Cell Social Implementation Models" (Saitama City, Shiga Prefecture, West Nippon Expressway Company Limited, Fukuoka Prefecture, Fukuoka City) and the Tokyo Metropolitan Government's "Air Solar Pre-Introduction Project for Tokyo Metropolitan Facilities".

Researchers from Korea's Inha University, France's CY Cergy Paris Université and Hanoi University of Science and Technology in Vietnam have developed a new family of molecular‑glass hole‑transport materials (HTMs) - T3A, T3B and T3C - to address the long‑term thermal instability of n‑i‑p perovskite solar cells that rely on spiro‑MeOTAD. Using a bulky 9,9‑diphenylfluorene core linked to di‑p‑methoxyphenylamine, they tuned the glass transition temperature (Tg) from 112 °C for T3A to 120 °C for T3B and 131 °C for T3C, aiming to suppress thermally driven morphology changes in the HTM layer.

Devices were fabricated in a standard n‑i‑p stack, simply swapping spiro‑MeOTAD for T3A, T3B or T3C while keeping LiTFSI/tBP doping and the overall HTM:LiTFSI:tBP molar ratio constant; for T3C, its limited solubility in chlorobenzene forced a lower HTM concentration, already compromising film uniformity. Under these conditions, T3A‑ and T3B‑based cells delivered initial power conversion efficiencies (PCEs) above 18 %, whereas T3C devices reached only 8.6 % because JSC, VOC and fill factor (FF) are all reduced by pinholes and inhomogeneous coverage.

Researchers from the University of Campinas (UNICAMP), Federal Research Center for Problems of Chemical Physics and Medicinal Chemistry RAS, Zhengzhou Research Institute of HIT and Soochow University have outlined a coordinated roadmap for pushing metal halide perovskite (MHP) optoelectronics beyond the current efficiency race toward long-term stability, cost reduction, and true industrial scalability. 

Anchored in the BRICS joint initiative (a multilateral science, technology and innovation program through which Brazil, Russia, India, China and South Africa co-fund coordinated research projects), the team emphasizes that perovskite research must now be guided by application-specific stability requirements, integrating low-dimensional interface engineering, quantum-dot strategies, and advanced in situ characterization to deliver durable devices for both terrestrial and space environments.

Sunic System has announced that it has signed a memorandum of understanding with the Korea Research Institute of Chemical Technology (KRICT) to develop large-scale manufacturing technology for perovskite solar cells and establish a commercialization platform for perovskite solar cells.

Under the agreement, KRICT will lead materials and process development, while Sunic System will focus on vacuum deposition equipment and mass production technologies. The collaboration is aimed at bridging the gap between research and commercial-scale production. The goal is to accelerate commercialization by reducing the disconnect between laboratory-level performance and large-area manufacturing, while enhancing process and equipment technologies to strengthen industry-wide production capabilities.

Researchers from Zhejiang University, Shanghai University of Electric Power, Zhejiang Zheneng Wenzhou Power Generation Co., and Ningbo University of Technology have reported significant progress in tin-based, hole-transport-layer-free (HTL-free) perovskite solar cells (PSCs). Their study introduces a gradient doping strategy to enhance the optoelectronic properties of MASnI₃ absorbers through precise band engineering, achieving remarkable efficiency improvements verified by SCAPS-1D numerical simulations.

Tin-based PSCs have emerged as promising candidates for eco-friendly and lead-free photovoltaics due to tin’s non-toxic nature and favorable semiconductor characteristics, including high carrier mobility and optimal bandgaps. Yet, eliminating the traditional HTL has historically reduced device performance. The team’s approach directly tackles this limitation by creating a controlled doping gradient within the absorber, generating an internal electric field that boosts charge separation and transport efficiency.

Korea-based Sunic System has reportedly established a U.S. subsidiary to strengthen its position in the perovskite solar cell market. The company said the new entity will focus on sales, technical support and customer engagement centered on deposition equipment for perovskite solar cells. The move is aimed at accelerating response times for North American clients and localizing technical support capabilities.

Sunic System said it is leveraging its vacuum thin-film deposition expertise, built in the display sector, to secure competitiveness in solar manufacturing processes where large-area uniformity and process reproducibility are critical. The company is also expanding external partnerships to advance mass production technologies.