A5057150954- Perovskite Materials and Applications
- Conducting polymers and applications
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Organic Electronics and Photovoltaics
- Organic Light-Emitting Diodes Research
- Solid-state spectroscopy and crystallography
- Advanced battery technologies research
National Institute for Materials Science
2018-2025
University of Tsukuba
2018
For the fabrication of efficient Sn-based perovskite solar cells (PSCs), deposition uniform and pinhole-free films with low Sn4+ content remains a crucial factor. In this work, we present coadditive engineering process by introduction hydrazinium chloride (N2H5Cl) in single precursor solvent system to fabricate FASnI3 films. The successful integration N2H5Cl results reduced concentration 20% film leading suppressed carrier recombination coverage. These remarkable improvements power...
Sn-based perovskite solar cells (PSCs) featuring high performance and long-term stability are very challenging because Sn2+ is relatively prone to oxidation. Here, we have performed coadditive engineering with 5-ammonium valeric acid iodide (5-AVAI) for FASnI3-based films. From the morphological, structural, elemental analyses, observed that 5-AVAI affects crystal growth of perovskites through its hydrogen bond I– SnI64– octahedral. As a result, pinhole-free homogeneous stable films form...
Developing high-performance and stable Sn-based perovskite solar cells (PSCs) is difficult due to the inherent tendency of Sn
Tin-based halide perovskite solar cells (Sn–PSCs) have attracted a progressive amount of attention as potential alternative to lead-based PSCs (Pb–PSCs). Sn-perovskite films are fabricated by solution process spin-coating technique. However, the efficiency these devices varies significantly with different batches precursor due poor chemical stability SnI2-DMSO and oxidation Sn2+ Sn4+. This study investigated origin before film formation, it was identified that ionization SnI2 in dimethyl...
To commercialize perovskite solar cells (PSCs), it is crucial to develop cost‐effective, dopant‐free hole transport layers (HTLs) that can be processed at low temperatures. Herein, a small molecular material 4,4′,4′‐Tris[2‐naphthyl(phenyl)amino]triphenylamine (2TNATA) was utilized in inverted PSCs as HTL. The position of the highest occupied orbital energy 2TNATA properly aligned with valence band maximum. Moreover, lower temperatures and shows excellent thermal stability. lead (Pb) on...
Sn‐perovskites are considered a suitable alternative to toxic Pb‐perovskites due their low toxicity and optimum optoelectronic properties. However, high‐efficiency Sn‐based perovskite solar cells (Sn‐PSCs) typically use poly (3,4‐ethylenedioxythiophene):polystyrene sulfonic acid (PEDOT:PSS) as hole‐transporting material (HTM), which limits stability its acidic nature. This study introduces SnO X nanocrystals, synthesized through synproportionation reaction of Sn 4+ with 0 under mild...
In the planar heterostructure of perovskite-based solar cells (PSCs), tin oxide (SnO2) is a material that often used as electron transport layer (ETL). SnO2 ETL exhibits favorable optical and electrical properties in PSC structures. Nevertheless, open circuit voltage (VOC) depletion occurs PSCs due to defects arising from high oxygen vacancy on surface deeper conduction band (CB) energy level SnO2. this research, cerium (Ce) dopant was introduced (Ce-SnO2) suppress VOC loss PSCs. The CB...
Sn‐based perovskite solar cells (PSCs) are promising alternatives to replacing toxic Pb‐based PSCs, which have shown a rapid rise in photovoltaic applications the past 1 year. However, reported PSCs often fabricated with small aperture area (typically 0.02–0.1 cm 2 ) because forming homogeneous pinhole‐free continuous films over large surface is still challenging. Herein, post‐deposition vapor annealing (PDVA) process assisted by methylammonium chloride presented that enables fabrication of...
The photodecomposition of PbI 2 in the perovskite halide structure has been identified as a primary reason for rapid degradation metal solar cells (PSCs) under continuous illumination. In particular, excess on surface films reduces stability PSCs via several mechanisms that are still unelucidated. Herein, influence is investigated by varying Au deposition rate, which results different temperatures during fabrication PSCs, and then they compared with stoichiometric PSCs. It demonstrated anion...
In article number 1900245, Jae-Joon Lee, Ashraful Islam, and co-workers introduce a post-deposition vapor annealing process, assisted by methylammonium chloride to fabricate stable, homogeneous pin-hole-free FASnI3 perovskite absorber films with low crystal defects surface recombination over relatively large area. Inverted planar Pb-free solar cells fabricated 1.02 cm2 aperture area show maximum power conversion efficiency of 6.33% high reproducibility stability.