Challenges remain hindering the performance and stability of inverted perovskite solar cells (PSCs), particularly for the nonstable interface between lead halide perovskite and charge extraction metal oxide layer. Herein, a simple yet scalable interfacial strategy to facilitate the assemble of high‐performance inverted PSCs and scale‐up modules is reported. The hybrid interfacial layer containing self‐assembly triphenylamine and conjugated poly(arylamine) simultaneously improves the chemical stability, charge extraction, and energy level alignment of hole‐selective interface, meanwhile promoting perovskite crystallization. Consequently, the correspondent inverted PSCs and modules achieve remarkable power conversion efficiencies (PCEs) of 24.5% and 20.7% (aperture area of 19.4 cm2), respectively. The PSCs maintain over 80% of its initial efficiency under one‐sun equivalent illumination of 1200 h. This strategy is also effective to perovskite with various bandgaps, demonstrating the highest PCE of 19.6% for the 1.76‐eV bandgap PSCs. Overall, this work provides a simple yet scalable interfacial strategy for obtaining state‐of‐the‐art inverted PSCs and modules.
Multi-dimensional lead halide perovskite solar cells (PSCs) exhibit great promise as a next generation photovoltaic technology. Herein, we develop a unique approach via interfacial ligand confinement for constructing finite 2D/3D...
The
heterointerface between a semiconducting metal oxide and a
perovskite critically impacts on the overall performance of perovskite
solar cells (PVSCs). Herein, we report a feasible yet effective strategy
to suppress the interfacial reaction between nickel oxide and the
perovskite via chemical passivation with self-assembled dyad molecules,
which leads to the simultaneous improvement of the power conversion
efficiencies (PCEs) and operational lifetimes of inverted PVSCs. As
a result, inverted PVSCs consisting of simple methylammonium iodide
perovskites have achieved an excellent PCE of 20.94% and decent photostability
with 93% of the initial value after 600 h of 1 sun equivalent illumination.
Moreover, this strategy can be readily translated into slot-die fabrication
of perovskite modules, achieving a high PCE of 14.90% with an area
of 19.16 cm2 (no shade in the interconnecting area) and
a geometrical fill factor of 93%. Overall, this work provides an effective
strategy to stabilize the vulnerable heterointerface in PVSCs.
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