Multijunction/tandem solar cells have naturally attracted great attention because they are not subject to the Shockley–Queisser limit. Perovskite solar cells are ideal candidates for the top cell in multijunction/tandem devices due to the high power conversion efficiency (PCE) and relatively low voltage loss. Herein, sandwiched gold nanomesh between MoO3 layers is designed as a transparent electrode. The large surface tension of MoO3 effectively improves wettability for gold, resulting in Frank–van der Merwe growth to produce an ultrathin gold nanomesh layer, which guarantees not only excellent conductivity but also great optical transparency, which is particularly important for a multijunction/tandem solar cell. The top MoO3 layer reduces the reflection at the gold layer to further increase light transmission. As a result, the semitransparent perovskite cell shows an 18.3% efficiency, the highest reported for this type of device. When the semitransparent perovskite device is mechanically stacked with a heterojunction silicon solar cell of 23.3% PCE, it yields a combined efficiency of 27.0%, higher than those of both the sub‐cells. This breakthrough in elevating the efficiency of semitransparent and multijunction/tandem devices can help to break the Shockley–Queisser limit.

Exploring strategies to control the crystallization and modulate interfacial properties for high‐quality perovskite film on industry‐relevant textured crystalline silicon solar cells is highly valued in the perovskite/silicon tandem photovoltaics community. The formation of a two‐dimensional/three‐dimensional (2D/3D) perovskite heterojunction has been widely employed to passivate defects and suppress ion migration in the film surface of perovskite solar cells. However, realizing solution‐processed heterostructures at the buried interface face solvent incompatibilities with the challenge of underlying‐layer disruption and texture incompatibilities with the challenge of uneven coverage. Here, we use a hybrid two‐step deposition method to prepare robust 2D perovskites with cross‐linkable ligands underneath the 3D perovskite. This structurally coherent interlayer benefits the preferred crystal growth of strain‐free and uniform upper perovskite, inhibits interfacial defect‐induced instability and recombination, and promotes charge‐carrier extraction with ideal energy‐level alignment. We demonstrate the broad applicability of the bottom‐contact heterostructure for different textured substrates with conformal coverage and various precursor solutions with intact properties free of erosion. With this buried interface engineering strategy, the resulting perovskite/silicon tandem cells based on industrially textured Czochralski (CZ) silicon achieve a certified efficiency of 28.4% (1.0 cm2), while retaining 89% of the initial PCE after over 1,000‐hour operation.This article is protected by copyright. All rights reserved

A high‐efficiency of 25.9% for perovskite/Si heterojunction tandem solar cells is achieved with an open‐circuit voltage of 1.74 V contributed by ≈1.02 and ≈0.72 V from the top and bottom cells, respectively. The results demonstrate that the addition of methylammonium chloride (MACl) effectively mitigates the open‐circuit voltage loss in the perovskite cell, where the MA cation tunes the bandgap while the Cl anion facilitates grain growth with less boundaries. Meanwhile, the excess lead iodide (PbI2) caused by the evaporation of MACl plays a beneficial passivation role to achieve high open‐circuit voltage. The performance of the tandem solar cells is a synergic consequence of all cations and anions considering the thickness, bandgap, phase stability, and defect in the perovskite absorber.

The hydroisomerization of n-alkanes is an important step in the production of high-quality bio-aviation kerosene. A SAPO-11 molecular sieve was synthesized using the hydrothermal synthesis method, and a 0.5 wt% Pt/SAPO-11 catalyst was prepared using the impregnation method. The crystal phase, pore structure, acidity, and morphology of Pt/SAPO-11 were characterized via X-ray diffraction, N2 adsorption-desorption, NH3 temperature-programmed desorption, scanning electron microscopy, and transmission electron microscopy, respectively. The hydroisomerization performance of the catalyst was evaluated with bio-n-hexadecane as the model compound. The results showed that temperature and space velocity had significant effects. Under the conditions of 340 °C, 1.5 MPa, WHSV = 1.0 h−1, V(H2): V(n-hexadecane) = 1000:1, the conversion of n-hexadecane and the selectivity of i-hexadecane were 81.8% and 86.5%, respectively.

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