Amphipathic Astaxanthin Additive for Low Voltage-loss Perovskite Solar Cells With Enhanced Quasi-Fermi Level Splitting and Solar Hydrogen Production Application.

Even though the power conversion efficiency (PCE) of perovskite solar cells (PSCs) is nearly approaching the Schottky-Queisser limit, low open-circuit voltage (V) and severe V loss problems continue to impede the improvement of PCEs. Astaxanthin (ASTA) additive is introduced in the formamidinium lead triiodide (FAPbI) perovskite film as an additive, which can facilitate the transportation of charge carriers and interact with Pb by its distinctive groupings. Furthermore, the addition of ASTA decreases the defect's active energy, regulates the deep-level defect by filling up the grain boundaries (GBs), and promotes the crystallization of perovskite film.

Suppressing Ion Migration by Synergistic Engineering of Anion and Cation toward High-Performance Inverted Perovskite Solar Cells and Modules.

Ion migration-induced intrinsic instability and large-area fabrication pose a tough challenge for the commercial deployment of perovskite photovoltaics. Herein, an interface heterojunction and metal electrode stabilization strategy is developed by suppressing ion migration via managing lead-based imperfections. After screening a series of cations and nonhalide anions, the ideal organic salt molecule dimethylammonium trifluoroacetate (DMATFA) consisting of dimethylammonium (DMA) cation and trifluoroacetate (TFA) anion is selected to manipulate the surface of perovskite films.

Trivalent Europium-Doped CsCl Quantum Dots for MA-Free Perovskite Solar Cells with Inherent Bandgap through Lattice Strain Compensation.

Cesium-formamidinium (Cs-FA) perovskites have garnered widespread interest owing to their excellent thermal- and photostability in achieving stable perovskite solar cells (PSCs). However, Cs-FA perovskite typically suffers from Cs and FA mismatches, affecting the Cs-FA morphology and lattice distortion, resulting in an enlarged bandgap (E ). In this work, "upgraded" CsCl, Eu -doped CsCl quantum dots, are developed to solve the key issues in Cs-FA PSCs and also exploit the advantage of Cs-FA PSCs on stability.

Interfacial Engineering of Au@NbCT-MXene Modulates the Growth Strain, Suppresses the Auger Recombination, and Enables an Open-Circuit Voltage of over 1.2 V in Perovskite Solar Cells.

Defects at the interface of charge transport layers can cause severe charge accumulation and poor charge transferability, which greatly affect the efficiency and stability of stannic oxide (SnO)-based perovskite solar cells (PSCs). Herein, a new type of MXene (NbCT-MXene) is applied to the interface of SnO layers to passivate the interfacial defects and promote charge transport. NbCT-MXene in PSCs realizes the role of boosting the conductivity, reducing the tin vacancies in the interstitial void of the SnO layer, decreasing the defect density, and aligning the bandgap.

Efficient single-component white light emitting diodes enabled by lanthanide ions doped lead halide perovskites via controlling Förster energy transfer and specific defect clearance.

Currently, a major challenge for metal-halide perovskite light emitting diodes (LEDs) is to achieve stable and efficient white light emission due to halide ion segregation. Herein, we report a promising method to fabricate white perovskite LEDs using lanthanide (Ln) ions doped CsPbCl perovskite nanocrystals (PeNCs). First, K ions are doped into the lattice to tune the perovskite bandgap by partially substituting Cs ions, which are well matched to the transition energy of some Ln ions from the ground state to the excited state, thereby greatly improving the Förster energy transfer efficiency from excitons to Ln ions.

Halide anions engineered ionic liquids passivation layer for highly stable inverted perovskite solar cells.

Long-term stability remains a great challenge for metal halide perovskite solar cells (PSCs). The utilization of ionic liquids (ILs) is a promising strategy to solve the stability problem. However, few studies have focused on controlling the halide anions of ILs, in which different organic cations can modulate the melting point of ILs and film crystal growth.

Highly efficient ligand-modified manganese ion doped CsPbCl perovskite quantum dots for photon energy conversion in silicon solar cells.

Manganese ion doped CsPbX perovskite quantum dots (QDs) demonstrate high absorption of ultraviolet (UV) light and efficient orange emission with a large Stokes shift, and are almost transparent to visible light, which are ideal photon energy converters for solar cells. In this work, Mn ion doped CsPbCl QDs were synthesized by incorporating a long-chain ammonium ligand dodecyl dimethylammonium chloride (DDAC), in which the DDAC ligand not only played the role of replacing the surface ligands of QDs, but also enhanced the efficiency and stability of Mn ion doped QDs. The as-prepared QD sample displayed a photoluminescence quantum yield (PLQY) as high as 91% and served as a photon energy converter for silicon solar cells (SSCs).

Unraveling the Dual-Functional Mechanism of Light Absorption and Hole Transport of CuCdZnSnS for Achieving Efficient and Stable Perovskite Solar Cells.

Broadening the near-infrared (NIR) spectrum of device is critical to further improve the power conversion efficiency (PCE) of the perovskite solar cells (PSCs). In this work, novel CuCdZnSnS (CZTS:Cd) film prepared by thermal evaporation method was employed as the NIR light-harvesting layer to complement the absorption of the perovskite. At the same time, Au nanorods (NRs) were introduced into the hole-transporting layer (HTL) to boost the utilization of CZTS:Cd to NIR light through localized surface plasmon effect.