Perovskite solar cells (PSCs) based on organic–inorganic hybrid materials are a rising technology offering an alternative to silicon‐based solar cells. Electron‐transport materials (ETMs) are important for PSCs and have received much attention. Here, first, the development of the structure of PSCs, from which the ETM requirements would be derived, is briefly discussed. Second, the progress of ETMs in mesoscopic PSCs, as well as regular (n–i–p) and inverted (p–i–n) planar PSCs is surveyed and analyzed, in terms of the material requirements, inorganic ETMs, organic ETMs, and interfacial materials. Third, the advancement of PSCs without ETMs is discussed. Finally, a summary and outlook on the current challenges and future development of ETMs in PSCs is given.
Organic solar cells (OSCs) have entered the era of non-fullerene electron acceptors. Nowadays with the rapid development of non-fullerene electron acceptor materials, Organic photovoltaic show huge potential in challenging conventional photovoltaic technology. Among the emerging non-fullerene electron acceptors, the Y-series acceptors own superior performance. The single-junction devices based Y-series acceptors have achieved power conversion efficiencies of 17∼18%. This paper gives an overview of the recent advances of Y-series electron acceptors. Through discussing the selected molecules, the perspective of molecular design on three parts of the molecules, including the central core, side chain and end group, are spotlighted, and the photoelectric properties, photovoltaic performance and film morphology of various Y-series acceptors materials are also presented. Finally, some molecule design directions will be proposed to further promote the progress of OSCs.
The first iron-catalyzed esterification of the primary benzylic C-H bonds with carboxylic acids using di-tert-butyl peroxide as an oxidant is achieved by novel ionic iron(III) complexes containing an imidazolinium cation. The use of well-defined, air-stable, and available iron(III) complex in a 5 mol % loading and readily available starting materials with a broad generality and outstanding sterically hindered tolerance renders this methodology a useful alternative to other protocols that are typically employed for the synthesis of benzyl esters.
New nanoparticles (Y6 NPs) based on an A−DA’D−A fused-ring conjugated small molecule Y6 have been prepared for the combined photothermal and photodynamic therapy of cancer. Y6 NPs show excellent light...
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