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Updated: Sep 26, 2026
Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells
Published on: March 19, 2017
Prussian blue regulates ion dynamics in perovskite solar cells
Fang Cao1,2, Mengen Ma2,3, Junjie Zhou4
1State Key Laboratory of Physical Chemistry of Solid Surfaces, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), National and Local Joint Engineering Research Center of Preparation Technology of Nanomaterials, Fujian Key Laboratory of Advanced Materials, College of Chemistry and Chemical Engineering, School of Intelligent Manufacturing (Pen-Tung Sah Institute of Micro-Nano Science and Technology), College of Materials, Xiamen University, Xiamen, China.
Abstract:
Perovskite photovoltaics are limited by structural instabilities initiated during crystallization and amplified under operation. We report that a lattice-matched Prussian blue scaffold directs heterogeneous nucleation to produce highly oriented, strain-relaxed films. Its redox-active Fe-C≡N-Fe network mediates the conversion of Pb0 and I0 defects, and its rigid open framework suppresses A-site cation redistribution and the resulting electronic inhomogeneity under bias. This strategy yielded champion power conversion efficiencies of 26.1% (n-i-p) and 26.9% (p-i-n; 26.2% certified), scaling to 23.4% in 6-centimeter-by-6-centimeter minimodules and a certified 22.9% in 30-centimeter-by-30-centimeter submodules. Submodules with initial power conversion efficiencies ranging from 20.2 to 21.0% showed robust durability under accelerated aging and no discernible decline relative to a silicon reference over 5 months of outdoor testing.
