An open-cage bis[60]fulleroid as electron transport material for tin halide perovskite solar cells
Chemical Communications Royal Society of Chemistry (RSC) (2024)
Abstract:
All-Perovskite Tandems Enabled by Surface Anchoring of Long-Chain Amphiphilic Ligands
ACS Energy Letters American Chemical Society (ACS) (2024) 520-527
Compositional Transformation and Impurity‐Mediated Optical Transitions in Co‐Evaporated Cu2AgBiI6 Thin Films for Photovoltaic Applications
Advanced Energy Materials Wiley (2024)
Multifunctional ytterbium oxide buffer for perovskite solar cells
Nature Springer Nature 625:7995 (2024) 516-522
Abstract:
Perovskite solar cells (PSCs) comprise a solid perovskite absorber sandwiched between several layers of different charge-selective materials, ensuring unidirectional current flow and high voltage output of the devices. A ‘buffer material’ between the electron-selective layer and the metal electrode in p-type/intrinsic/n-type (p-i-n) PSCs (also known as inverted PSCs) enables electrons to flow from the electron-selective layer to the electrode. Furthermore, it acts as a barrier inhibiting the inter-diffusion of harmful species into or degradation products out of the perovskite absorber. Thus far, evaporable organic molecules and atomic-layer-deposited metal oxides have been successful, but each has specific imperfections. Here we report a chemically stable and multifunctional buffer material, ytterbium oxide (YbOx), for p-i-n PSCs by scalable thermal evaporation deposition. We used this YbOx buffer in the p-i-n PSCs with a narrow-bandgap perovskite absorber, yielding a certified power conversion efficiency of more than 25%. We also demonstrate the broad applicability of YbOx in enabling highly efficient PSCs from various types of perovskite absorber layer, delivering state-of-the-art efficiencies of 20.1% for the wide-bandgap perovskite absorber and 22.1% for the mid-bandgap perovskite absorber, respectively. Moreover, when subjected to ISOS-L-3 accelerated ageing, encapsulated devices with YbOx exhibit markedly enhanced device stability.Multicomponent Approach for Stable Methylammonium-Free Tin–Lead Perovskite Solar Cells
ACS Energy Letters American Chemical Society (ACS) (2024) 432-441