Novel Strategy for High Efficient and Stable Perovskite Solar Cells through Atomic Layer Deposition.

The perovskite material has demonstrated conceivable potential as an absorbing material of solar cells. Although the power conversion efficiency of the device based on perovskite has rapidly come to 26%, there are still many factors that affect the further improvement of the photoelectric conversion efficiency. Interface defects are the dominating concern that influence carrier transportation and stability.

Postpassivation of Cs(FAMA)Pb(IBr) Perovskite Films with Tris(pentafluorophenyl)borane.

Passivating defects to suppress recombination is a valid tactic to improve the performance of third-generation perovskite-based solar cells. Pb is the primary defect in Pb-based perovskites. Here, tris(pentafluorophenyl)borane is inserted between the perovskite and spiro-OMeTAD layer in SnO-based planar perovskite solar cells.

High-Performance and Hysteresis-Free Perovskite Solar Cells Based on Rare-Earth-Doped SnO Mesoporous Scaffold.

Tin oxide (SnO), as electron transport material to substitute titanium oxide (TiO) in perovskite solar cells (PSCs), has aroused wide interests. However, the performance of the PSCs based on SnO is still hard to compete with the TiO-based devices. Herein, a novel strategy is designed to enhance the photovoltaic performance and long-term stability of PSCs by integrating rare-earth ions Ln (Sc, Y, La) with SnO nanospheres as mesoporous scaffold.

Cadmium sulfide as an efficient electron transport material for inverted planar perovskite solar cells.

Dispersible cadmium sulfide (CdS) nanoparticles are synthesized by a facile solvothermal reaction and are used for the first time as an electron transport layer (ETL) in inverted planar perovskite solar cells. The CdS ETL has superb electron extraction and transport properties, leading to a solar cell with light hysteresis and a high efficiency of 13.36%.

Annealing-Free Cr O Electron-Selective Layer for Efficient Hybrid Perovskite Solar Cells.

The electron-selective layer (ESL) plays a pivotal role in the performance of perovskite solar cells (PSCs). In this study, amorphous dispersible chromium oxide (Cr O ) nanosheets are synthesized by a facile solvothermal reaction, and a Cr O ESL is prepared by spin-coating Cr O ink on fluorine-doped tin oxide substrates without need for further annealing. By using Cr O as the electron-selective layer and Cs (MA FA ) Pb(I Br ) as the light-absorption layer, a planar hybrid perovskite solar cell is fabricated.

Nickel selenide/reduced graphene oxide nanocomposite as counter electrode for high efficient dye-sensitized solar cells.

Nickel selenide/reduced graphene oxide (NiSe/rGO) nanosheet composite is synthesized by a facile hydrothermal process and used as counter electrode (CE) for dye-sensitized solar cells (DSSC). The NiSe/rGO film spin-coated on FTO show prominent electrocatalytic activity toward I/I. The electrocatalytic ability of NiSe/rGO film is verified by photocurrent-voltage curves, cyclic voltammetry, electrochemical impedance spectroscopy and Tafel polarization curves.

Modulated CHNHPbIBr film for efficient perovskite solar cells exceeding 18.

The organic-inorganic lead halide perovskite layer is a crucial factor for the high performance perovskite solar cell (PSC). We introduce CHNHBr in the precursor solution to prepare CHNHPbIBr hybrid perovskite, and an uniform perovskite layer with improved crystallinity and apparent grain contour is obtained, resulting in the significant improvement of photovoltaic performance of PSCs. The effects of CHNHBr on the perovskite morphology, crystallinity, absorption property, charge carrier dynamics and device characteristics are discussed, and the improvement of open circuit voltage of the device depended on Br doping is confirmed.