Stable perovskite solar cells with efficiency exceeding 24.8% and 0.3-V voltage loss

Abstract

Further improvement and stabilization of perovskite solar cell (PSC) performance are essential to achieve the commercial viability of next-generation photovoltaics. Considering the benefits of fluorination to conjugated materials for energy levels, hydrophobicity, and noncovalent interactions, two fluorinated isomeric analogs of the well-known hole-transporting material (HTM) Spiro-OMeTAD are developed and used as HTMs in PSCs. The structure–property relationship induced by constitutional isomerism is investigated through experimental, atomistic, and theoretical analyses, and the fabricated PSCs feature high efficiency up to 24.82% (certified at 24.64% with 0.3-volt voltage loss), along with long-term stability in wet conditions without encapsulation (87% efficiency retention after 500 hours). We also achieve an efficiency of 22.31% in the large-area cell.

Drop‐Casting to Make Efficient Perovskite Solar Cells under High Humidity

“…owing to high power conversion efficiency (PCE), low cost, and fast-improving stability. [1][2][3][4][5][6][7] One of the critical factors limiting the commercialization of perovskite solar cells is the lack of suitable fabrication process for upscaling. The reported perovskite solar cells with record PCEs were made by spin-coating in N 2 or Ar glovebox.…”

Effects of mixed-valence states of Eu-doped FAPbI3 perovskite crystals studied by first-principles calculation

“…These terms represent the following interactions: electron and nuclear Zeeman interaction, hyperfine structure of spin-nuclear interaction, fine structure of dipole-dipole interaction, and nuclear quadrupole interaction. The magnetic parameter of the principal values and axes of g-tensor are the sum of the isotropic and anisotropic parts, as noted by eqn (2) and (3). The anisotropic g-tensor is mainly related to the second perturbation with…”

“…Perovskite solar cells have a great advantage for the development of photovoltaic applications using various perovskite crystals with different chemical elements, crystal structures and multilayer cells. [1][2][3] Perovskite solar cells demonstrate high performance of the photovoltaic properties, such as open short circuit voltage, conversion efficiency and single-film by the spin-coating method. The wide-band gap perovskite tandem solar cell with multiterminal configuration using silicon and gallium arsenide has been developed for the practical use of photovoltaic devices.…”

p‐Type Charge Transfer Doping of Graphene Oxide with (NiCo)1−yFeyOx for Air‐Stable, All‐Inorganic CsPbIBr2 Perovskite Solar Cells

“…Perovskite solar cell (PSC) is one of the most promising solutions to photovoltaic technologies due to their comparable power conversion efficiency (PCE) up to 25.5 % [1–4] . But the inferior stability by moisture and/or heat attacks is still a great challenge for their commercialization because of the easy decomposition of organic methylamine (MA) and formamidinium (FA) species [5, 6] .…”