BAr2‐Bridged Azafulvene Dimers with Tunable Energy Levels for Photostable Near‐Infrared Dyes
Chemistry - A European Journal Wiley 29:34 (2023) e202300529
Prospects for tin-containing halide perovskite photovoltaics
Precision Chemistry American Chemical Society 1:2 (2023) 69-82
Abstract:
Tin-containing metal halide perovskites have enormous potential as photovoltaics, both in narrow band gap mixed tin–lead materials for all-perovskite tandems and for lead-free perovskites. The introduction of Sn(II), however, has significant effects on the solution chemistry, crystallization, defect states, and other material properties in halide perovskites. In this perspective, we summarize the main hurdles for tin-containing perovskites and highlight successful attempts made by the community to overcome them. We discuss important research directions for the development of these materials and propose some approaches to achieve a unified understanding of Sn incorporation. We particularly focus on the discussion of charge carrier dynamics and nonradiative losses at the interfaces between perovskite and charge extraction layers in p-i-n cells. We hope these insights will aid the community to accelerate the development of high-performance, stable single-junction tin-containing perovskite solar cells and all-perovskite tandems.Tripodal triazatruxene derivative as a face-on oriented hole-collecting monolayer for efficient and stable inverted perovskite solar cells
Journal of the American Chemical Society American Chemical Society 145:13 (2023) 7528-7539
Abstract:
Hole-collecting monolayers have drawn attention in perovskite solar cell research due to their ease of processing, high performance, and good durability. Since molecules in the hole-collecting monolayer are typically composed of functionalized π-conjugated structures, hole extraction is expected to be more efficient when the π-cores are oriented face-on with respect to the adjacent surfaces. However, strategies for reliably controlling the molecular orientation in monolayers remain elusive. In this work, multiple phosphonic acid anchoring groups were used to control the molecular orientation of a series of triazatruxene derivatives chemisorbed on a transparent conducting oxide electrode surface. Using infrared reflection absorption spectroscopy and metastable atom electron spectroscopy, we found that multipodal derivatives align face-on to the electrode surface, while the monopodal counterpart adopts a more tilted configuration. The face-on orientation was found to facilitate hole extraction, leading to inverted perovskite solar cells with enhanced stability and high-power conversion efficiencies up to 23.0%.Composition–Property Mapping in Bromide-Containing Tin Perovskite Using High-Purity Starting Materials
ACS Applied Energy Materials American Chemical Society (ACS) 5:12 (2022) 14789-14798
Challenges and strategies toward long-term stability of lead-free tin-based perovskite solar cells
Communications Materials Springer Nature 3:1 (2022) 104