April 2026

Researchers from the University of Science and Technology of China and the University of Colorado Boulder have demonstrated a perovskite diode that acts as both an efficient solar cell and a high‑efficiency LED using the same 800 nm thick absorber layer.

The device embeds porous micrometer‑scale alumina (Al₂O₃) “sponge” islands (∼5 μm wide, 0.5 μm tall) inside the perovskite, allowing a layer thick enough for photovoltaics to also extract light efficiently like an LED. In conventional devices, perovskite LEDs rely on ultrathin, discontinuous layers of about 50 nm, whereas efficient solar cells need layers roughly sixteen times thicker; this architecture reconciles those opposing thickness requirements in a single stack. Surface‑functionalized alumina nanoparticles assemble electrostatically into these islands: one population is coated with negatively charged Me‑4PACz, the other with positively charged ODA, giving a porous, low‑index network the perovskite can grow through without disrupting charge transport.

Researchers at the State University of New York at Buffalo, University of California, Los Alamos National Laboratory, National Taiwan University and Brookhaven National Laboratory have demonstrated a strategy to extend the optical activity of chiral perovskites into the visible spectral range by introducing charge-transfer states via molecular doping.

Chiral perovskites are semiconductors with broken mirror symmetry that can selectively interact with circularly polarized light. However, their practical use has been limited by their wide bandgaps, which typically restrict photoresponse to the ultraviolet region. To address this limitation, the team incorporated the electron-accepting molecule 2,3,5,6-Tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ) into a chiral perovskite matrix.

A recent University at Buffalo (SUNY) study has shown that a fluorinated multifunctional ligand can dramatically improve both efficiency and stability in deep-blue CsPb(Br/Cl)₃ perovskite nanocrystal LEDs by suppressing defect formation and halide ion migration.

Deep-blue PeLEDs require emission in the 460-470 nm range, which can be realized either with mixed-halide CsPb(Br/Cl)₃ nanocrystals or with strongly quantum-confined CsPbBr₃ nanoplatelets. Quantum-confined CsPbBr₃ NPLs have demonstrated 461 nm emission with a 13 nm FWHM and 96% PLQY, enabling REC.2020-compliant deep blue (CIE (0.135, 0.046)), but EQE remains below 7%. Mixed-halide CsPb(Br/Cl)₃ offers a more direct compositional route, yet is prone to halide vacancies and instability, as seen in formamidinium-doped CsPb(Cl₀.₅Br₀.₅)₃ PeNCs that reach 1452 cd m⁻² but only 5% EQE and a peak at 474 nm, slightly red of the target window. In the new work, HFPA-engineered CsPb(Br/Cl)₃ emitters are tuned specifically for operation in the 460-470 nm pure-blue range, directly targeting display-relevant color coordinates.

Hefei Puskey New Energy Technology has announced that its CVD dry process pilot line has successfully completed its first production run on a 300 mm × 300 mm large-area PET substrate. The company also revealed that the first flexible perovskite solar module produced using a fully CVD dry process has rolled off the line.

The newly produced module is based on Puskey’s proprietary coherent vapor phase (CVD) deposition technology. Unlike conventional solution-based methods, this dry process eliminates the need for organic solvents, offering a cleaner and more controllable manufacturing route. The resulting modules combine several advantages, including high power-to-weight ratio, improved stability, uniformity over large areas, and potentially lower production costs.

Researchers at Ludwig-Maximilians-Universität (LMU) have reported two complementary advances that address longstanding bottlenecks in perovskite quantum dots (pQDs): instability in polar environments and the lack of precise growth control. The studies introduce a ligand-engineering strategy for solvent stability and a kinetically controlled growth method enabling sub-unit-cell precision.

Perovskite quantum dots are highly efficient light emitters due to quantum confinement effects, which enable tunable absorption and emission. However, their soft ionic lattices make them particularly vulnerable to polar solvents such as alcohols, where rapid dissolution and degradation commonly occur. This instability has limited their processing, especially in scalable and environmentally friendly (“green”) solvent systems. To overcome this, the LMU team developed a new class of dicationic Gemini ligands terminated with hydroxyl groups. These ligands form a structured, ultrathin shell (~0.7 nm) around the quantum dots. The binding mechanism is asymmetric: ammonium groups anchor strongly to the pQD surface, alkyl chains create an apolar barrier, and hydroxyl termini form a polar external interface. Crucially, the hydroxyl groups do not bind to the surface, ensuring directional ligand attachment and preventing structural disruption.

RenShine Solar has reported several milestones around a 1.2 MW perovskite rooftop installation, the most recent of which is achieving “more than 7,600 kWh in one day”.

The 1.2 MW all‑perovskite distributed photovoltaic power station was completed on rooftops and connected to the grid as a demonstration project, using commercial perovskite modules of 1.2 m × 0.6 m and roughly 130 W output per module. This plant is said to have generated more than 3,000 kWh on its first day of operation and is expected to produce about 1.55 million kWh of electricity annually.

Risen Energy recently announced progress in its heterojunction (HJT) silicon-based perovskite tandem cell technology. Reportedly certified by authoritative institutions, the company’s 1 cm² tandem cell achieved a photoelectric conversion efficiency of 31.95%, with an open-circuit voltage of 1.988V.

This achievement is built upon the company’s long-term expertise in both HJT and perovskite technical routes. As one of the early pioneers in HJT industrialization, Risen Energy has mastered a comprehensive technical ecosystem, ranging from high-efficiency N-type HJT ground-based photovoltaic products to P-type HJT cells designed for the harsh environments of outer space.

Researchers from Japan's Chiba University, Kyoto University and the University of Electro-Communications have developed a universal, physics-based model that clarifies how energy levels align at electrode/hole-collecting-monolayer (HCM)/perovskite interfaces in inverted perovskite solar cells and how this alignment controls hole extraction and device performance. 

The new work replaces competing interface models - such as vacuum level alignment, Fermi level alignment, and electrode-modified Schottky models - with a single framework that treats the stack as two coupled but distinct interfaces. At the electrode/HCM contact, the alignment is governed by an interface dipole at a metal/organic interface, where the HCM acts as a dipole layer that shifts the electrode work function. At the HCM/perovskite boundary, both layers are treated as semiconductors and described using semiconductor heterojunction theory, with band offsets and band bending rather than simple vacuum-level matching.

Nanchang University researchers recently reported a molecular doping strategy that addresses a central bottleneck in formamidinium–cesium (FA_1−xCs_xPbI₃) perovskites: stabilizing the photoactive α-phase while maintaining high device efficiency and long-term operational stability.

Metal halide perovskites' large-scale deployment has been limited by phase instability and performance degradation. In FA–Cs systems, achieving the desired α-phase is particularly challenging because of limited incorporation of Cs⁺ ions and an incomplete understanding of the phase transition pathway. While two-step fabrication offers improved control over crystallization compared to one-step processing, it still struggles to deliver uniform cation distribution and stable phase formation. To address this, the team introduced a tailored additive, cesium 4-(diphenylphosphino)benzoate, designed to regulate Cs⁺ incorporation during film formation. 

Researchers from Korea University, Seoul National University, University of New South Wales, University of Toledo, Chonnam National University, Ulsan National Institute of Science and Technology, Cardiff University and the University of Surrey have reported a new strategy to enhance both the efficiency and stability of perovskite solar cells by leveraging a previously unrecognized interfacial phenomenon termed contact-triggered cationic interaction (CCI).

A schematic of CCI between framework-embedded molecules of 3D and 2D perovskites. Image from: Nature Energy

Unlike conventional approaches based on additive incorporation or surface passivation, CCI arises from simple physical contact between separately crystallized two-dimensional (2D) and three-dimensional (3D) perovskite films, without chemical bonding, intermixing or junction formation. At the interface, bulky spacer cations in the 2D perovskite deform and interact with formamidinium (FA) cations in the 3D lattice via dipole-induced dipole interactions. These interactions constrain the rotational freedom of the FA cations, effectively reducing molecular disorder. The strength of this interaction increases with alkyl chain length in the 2D layer, which provides more contact points and further restricts cation motion. As a result, CCI suppresses phase transitions, extends carrier lifetimes, and modifies photophysical behavior in a reversible manner.