【公開日：2025.06.10】【最終更新日：2025.04.15】
課題データ / Project Data
課題番号 / Project Issue Number
24AT5020
利用課題名 / Title
ナノ結晶材料の合成
利用した実施機関 / Support Institute
産業技術総合研究所 / AIST
機関外・機関内の利用 / External or Internal Use
内部利用（ARIM事業参画者以外）/Internal Use (by non ARIM members)
技術領域 / Technology Area
【横断技術領域 / Cross-Technology Area】（主 / Main）物質・材料合成プロセス/Molecule & Material Synthesis（副 / Sub）加工・デバイスプロセス/Nanofabrication
【重要技術領域 / Important Technology Area】（主 / Main）革新的なエネルギー変換を可能とするマテリアル/Materials enabling innovative energy conversion（副 / Sub）次世代ナノスケールマテリアル/Next-generation nanoscale materials
キーワード / Keywords
ナノ粒子/ Nanoparticles,太陽電池/ Solar cell,赤外・可視・紫外分光/ Infrared/visible/ultraviolet spectroscopy
利用者と利用形態 / User and Support Type
利用者名（課題申請者）/ User Name (Project Applicant)
松井 卓矢
所属名 / Affiliation
産業技術総合研究所再生可能エネルギー研究センター
共同利用者氏名 / Names of Collaborators in Other Institutes Than Hub and Spoke Institutes
Svrcek Vladimir
ARIM実施機関支援担当者 / Names of Collaborators in The Hub and Spoke Institutes
松﨑弘幸 永井秀和
利用形態 / Support Type
（主 / Main）技術補助/Technical Assistance（副 / Sub）-
利用した主な設備 / Equipment Used in This Project
報告書データ / Report
概要（目的・用途・実施内容）/ Abstract (Aim, Use Applications and Contents)
To enhance the stability of formamidinium lead iodide (FAPbI3) hybrid solar cells without compromising efficiency, we propose introducing a thin fs laser treated FAPbI3 quantum dot (QD) adlayer (<100 nm) onto bulk FAPbI3 film-based solar cells. In this study, we investigate the specific effects of surface ligands and femtosecond laser processing at a wavelength of 400 nm on the engineered FAPbI3 QD adlayer and its impact on perovskite film stability.
実験 / Experimental
A representative experimental result is shown in Fig. 1b. Femtosecond laser processing in octane induced spherification of the FAPbI3 quantum dots (QDs). In contrast, Fig. 1a shows the as-prepared QDs, which exhibit a typical cubic shape.
結果と考察 / Results and Discussion
Femtosecond (fs) laser treatment of colloidal FAPbI3 quantum dots (QDs) reshapes the particles and alters the ligand density, while preserving their stability. When a thin layer of FAPbI3 QDs is applied onto a bulk FAPbI3 film, it enhances the stability of the perovskite α-phase under humidity and light exposure (Fig. 1c). Importantly, the fs-laser treatment does not hinder the integration of the QDs onto the FAPbI3 thin films. The laser-treated QD adlayer improves the film’s overall stability, as evidenced by reduced color change under light soaking conditions. This improvement is attributed to surface modifications induced by the fs-laser, which promote the formation of more spherical particles compared to the original cubic-shaped QDs (Fig. 1a). The spherical engineered (SE) QD adlayer effectively slows the α-to-δ phase transition during prolonged light exposure. Additionally, fs-laser-treated QDs suppress the formation of PbI2, further contributing to enhanced material stability.
図・表・数式 / Figures, Tables and Equations
Fig. 1 (a) HRTEM image of untreated FAPbI₃ QDs, and (b) femtosecond laser-treated QDs, showing rounded edges and occasional spherical-shaped QDs. The insets show SAED patterns from particle-rich areas, with diffraction rings identified as corresponding to the cubic α-phase (red) and the hexagonal δ-phase (yellow). (c) Photographs of FAPI films (FAPI TF), films with as-prepared QDs and fs-treated QDs (SE-QDs) under a light-soaking chamber over time, demonstrating improved resistance to moisture and light when an SE-QD adlayer is applied.
その他・特記事項（参考文献・謝辞等） / Remarks(References and Acknowledgements)
成果発表・成果利用 / Publication and Patents
論文・プロシーディング（DOIのあるもの） / DOI (Publication and Proceedings)
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B. Alessi, Improvement in stability of perovskite solar cells by adlayer of laser treated FAPbI3 quantum dots, Nano Energy, 128, 109846(2024).
DOI: https://doi.org/10.1016/j.nanoen.2024.109846
口頭発表、ポスター発表および、その他の論文 / Oral Presentations etc.
特許 / Patents
特許出願件数 / Number of Patent Applications：0件
特許登録件数 / Number of Registered Patents：0件