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Article
Chemistry, Multidisciplinary
Xiaosong Qiu et al.
Summary: Carbon-based CsPbI2Br perovskite solar cells (PSCs) have gained attention for their cost-effectiveness and stability. However, their power conversion efficiency (PCE) is limited due to defects in CsPbI2Br and at the interface with the electron transport layer (ETL), as well as energy level mismatch. Introducing cadmium halides for thermal diffusion treatment improves the device performance, increasing PCE from 13.01% to 14.47%, 14.31%, and 13.46%, respectively.
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Nanoscience & Nanotechnology
Ling Liu et al.
Summary: After the rapid development of single-junction perovskite solar cells and organic solar cells, improving their power conversion efficiencies has become increasingly difficult. Tandem solar cells are gaining more attention due to their higher theoretical efficiency compared to single-junction solar cells. While good device performance has been achieved for perovskite/silicon and perovskite/perovskite tandem solar cells, very few studies have been done on 4-terminal inorganic perovskite/organic tandem solar cells. This work successfully fabricates 4-terminal inorganic perovskite/organic tandem solar cells using semi-transparent inorganic perovskite solar cells and organic solar cells, achieving higher efficiency than reported 2-terminal and 4-terminal inorganic perovskite/organic tandem solar cells.
NANO-MICRO LETTERS
(2023)
Review
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Leiping Duan et al.
Summary: Driven by the need for increased power conversion efficiency and simplified fabrication, tandem solar cells (TSCs) comprising silicon (Si) bottom cells and wide-bandgap perovskite top cells have emerged as a promising technology. However, the stability of perovskite remains a challenge for widespread commercialization. In this review, we discuss the current state of perovskite-Si TSC stability and identify key degradation mechanisms at the cell and module levels. We also consider economic factors and propose research directions to achieve the long-term stability necessary for successful commercialization.
NATURE REVIEWS MATERIALS
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Zemeng Dong et al.
Summary: We successfully enhanced the efficiency and stability of electrocatalytic nitrogen fixation by synthesizing a series of amorphous trimetal Pd-based nanosheets (PdCoM (M = Cu, Ag, Fe, Mo)), among which amorphous PdCoCu nanosheets exhibited excellent NRR activity at low overpotentials and outstanding stability with only 5% decrease after a long test period. This is attributed to the large specific surface area, abundant active sites, and structural engineering and electronic effect that efficiently restrains the hydrogen evolution.
Article
Multidisciplinary Sciences
Jaewang Park et al.
Summary: Controlling the crystallinity and surface morphology of perovskite layers is crucial for achieving high-efficiency perovskite solar cells. By adding alkylammonium chlorides (RACl) to a-formamidinium lead iodide (FAPbI(3)), the crystallization process and surface morphology of the perovskite thin films can be controlled. The resulting perovskite thin layers facilitate the fabrication of perovskite solar cells with a high power-conversion efficiency of 26.08%.
Article
Chemistry, Multidisciplinary
Yue-Min Xie et al.
Summary: Monolithic perovskite/organic tandem solar cells have gained increasing attention due to their high efficiency and easy fabrication. Improving the performance of these cells requires wide-bandgap perovskites and low-bandgap organic bulk-heterojunction rare cells. This study successfully synthesized high-efficiency perovskite solar cells and tandem cells through optimization methods.
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(2022)
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Shucheng Qin et al.
Summary: The photovoltaic performance of perovskite/organic tandem solar cells has been improved by reducing nonradiative charge recombination and broadening the absorption spectra range. The overall efficiency of the monolithic TSC reaches 22.0%, showing promise for future commercialization.
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(2022)
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Energy & Fuels
Wei Chen et al.
Summary: Perovskite/organic tandem solar cells have a promising future in thin-film photovoltaics due to the large chemical composition and tunability of their bandgap. However, their efficiency is currently limited by the open-circuit voltage loss and non-ideal interconnecting layers. In this study, the passivation of nickel oxide hole-transporting layers and the development of an optimized interconnecting layer structure led to a significant increase in efficiency, reaching a maximum of 23.60% (22.95% certified) in perovskite/organic tandem solar cells.
Article
Multidisciplinary Sciences
K. O. Brinkmann et al.
Summary: Multijunction solar cells can surpass the efficiency limits of single-junction devices. Metal halide perovskite solar cells, in combination with silicon and copper indium gallium selenide (CIGS) or as all-perovskite tandems, have shown promising results. Narrow-gap non-fullerene acceptors have also significantly improved the efficiencies of organic solar cells. In this study, perovskite-organic tandem cells with high efficiency and voltage are demonstrated, utilizing optimized charge extraction layers and an ultrathin metal-like indium oxide layer for interconnection. This milestone work outperforms the best perovskite single junctions and is comparable to perovskite-CIGS and all-perovskite multijunctions.
Article
Energy & Fuels
Changlei Wang et al.
Summary: A universal close-space annealing strategy is developed to improve the structural and optoelectronic quality of perovskite films, leading to the fabrication of efficient perovskite solar cells and all-perovskite tandem solar cells.
Article
Chemistry, Multidisciplinary
Yuanjia Ding et al.
Summary: Among inorganic perovskites, CsPbI2Br shows great potential for single-junction perovskite solar cells (PSCs) and perovskite/organic tandem solar cells (TSCs) due to its intrinsic thermal stability, suitable bandgap, and superior phase-stability. This study demonstrates that using PTQ10 as a hole transport layer (HTL) for PSCs and an inter-connecting layer (ICL) for TSCs can significantly improve the power conversion efficiencies (PCEs) of CsPbI2Br-based devices. The PTQ10 HTL exhibits better energy level matching with CsPbI2Br and can passivate the perovskite surface, leading to enhanced performance in both PSCs and TSCs.
Article
Chemistry, Physical
Jingjing Tian et al.
Summary: CsPbI2Br perovskite solar cells show potential as a top cell for tandem applications, but the open-circuit voltage (V-OC) reported so far is usually below the detailed balance (DB) limit for single-junction PSCs. By adding lead acetate to the CsPbI2Br precursor, losses due to nonradiative recombination can be significantly reduced, leading to improved power conversion efficiency and higher V-OC values.
ACS ENERGY LETTERS
(2022)
Article
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Su Geun Ji et al.
Summary: This study reports a pure-iodide wide-band-gap perovskite top cell that is almost free from halide segregation. Cs and dimethylammonium cations were simultaneously incorporated into the A-site of the perovskite to increase the band gap while maintaining the tolerance factor. However, the incorporation of dual cations resulted in the formation of orthorhombic and hexagonal phases instead of the pure perovskite phase.
Article
Physics, Applied
Zuxiong Xu et al.
Summary: A facile method of modifying the ZnO electron transporting layer with metal ions doping strategy was proposed to improve the performance of CsPbI2Br all-inorganic perovskite solar cells, resulting in enhanced open circuit voltage and power conversion efficiency.
APPLIED PHYSICS LETTERS
(2021)
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Chemistry, Physical
Dongdong Xia et al.
Summary: By introducing a fullerene acceptor into the binary photo-active layer, the ternary organic solar cells achieved a higher power conversion efficiency compared to binary solar cells, mainly due to optimized morphology and balanced hole and electron mobilities that help suppress charge recombination and increase photocurrent.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
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Lihua Zhu et al.
Summary: Nonradiative recombination losses caused by trap states at the surface and grain boundaries hinder the enhancement of power conversion efficiency and stability in perovskite solar cells. The introduction of 11MA additive successfully improves crystallinity, reduces trap state density, and inhibits ion migration, leading to simultaneous improvement in efficiency and stability. The device with 11MA additive achieves significantly higher PCE and maintains a high level of efficiency after aging for 3000 hours under ambient conditions.
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(2021)
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Shangshang Chen et al.
Summary: The study found that DMSO liquid additive trapped in perovskite-substrate interfaces during film formation led to voids, accelerating film degradation. Partial replacement of DMSO with solid-state carbohydrazide reduced interfacial voids and increased stability. Blade-coated p-i-n structure PSCs achieved a maximum PCE of 23.6% without efficiency loss after stability tests, demonstrating improved efficiency and stability with the new approach.
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Yuanchuang Wu et al.
Summary: The presence of defects on the surface of CsPbI2Br perovskite films can lead to inferior power conversion efficiency of solar cells. By coating phenylethylammonium iodide (PEAI) solution onto the surface and annealing, the defect density on the surface can be effectively reduced. In situ characterization shows that the PEAI treatment induces surface crystal reconstruction and decreases trap density, leading to a high power conversion efficiency of 13.38% for the CsPbI2Br perovskite solar cell with a carbon electrode.
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Summary: The past decade has seen significant advancements in perovskite solar cells, particularly in the role of wide-bandgap PSCs in tandem solar cells. Current efforts are focused on addressing stability and efficiency issues in both organic-inorganic hybrid perovskites and all-inorganic perovskites.
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