【公開日：2024.07.25】【最終更新日：2024.06.27】
課題データ / Project Data
課題番号 / Project Issue Number
23NM5318
利用課題名 / Title
Fabrication of Stable and Efficienct Perovskite Solar Cells
利用した実施機関 / Support Institute
物質・材料研究機構 / NIMS
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）計測・分析/Advanced Characterization（副 / Sub）加工・デバイスプロセス/Nanofabrication
【重要技術領域 / Important Technology Area】（主 / Main）量子・電子制御により革新的な機能を発現するマテリアル/Materials using quantum and electronic control to perform innovative functions（副 / Sub）-
キーワード / Keywords
Perovskite, NiOx, Device,電子顕微鏡/ Electronic microscope
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)
KHADKA Dhruba Bahadur
所属名 / Affiliation
物質・材料研究機構
共同利用者氏名 / Names of Collaborators in Other Institutes Than Hub and Spoke Institutes
TAKADA Kazuyo
ARIM実施機関支援担当者 / Names of Collaborators in The Hub and Spoke Institutes
利用形態 / Support Type
（主 / Main）機器利用/Equipment Utilization（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)
Lead halide perovskite-based solar cells (Pb-HaPSCs) have made a revolutionary impact in the field of photovoltaic research as the power conversion efficiencies achieved more than 26.1%. It is competitive to other PV technologies such as; Si, GaAs, CIGS, and CdTe-based PV technology due to low production cost and high yield. I have been working on the Pb and Pb free halide perovskite-based photovoltaic devices. I have experience with different types of solar cell materials and devices. It needs to optimize the different material layer properties to get a good working device. This research work is important for the development of green technology.
実験 / Experimental
In my experiment, I measured absorption spectra, PL spectra, and film morphology using ARIM facilities.
結果と考察 / Results and Discussion
I have fabricated perovskite solar cells using molecular passivation using diammonium iodide functional molecules featuring aryl or alkyl cores onto 3D-perovskite surfaces (Fig.1). Our findings revealed the remarkable efficacy of piperazine dihydriodide (PZDI), characterized by an alkyl core and electron-rich -NH terminal, in mitigating surface and bulk defects while modifying surface chemistry. We found that the surface passivation mitigates crystal strain and improves carrier extraction efficiency. These effects resulted in an impressive device efficiency of 23.17% with superior long-term stability. This report will shed light on the synergetic effect of bifunctional molecules in defect mitigation, opening avenues for design strategies centered on bonding-regulated molecular passivation to enhance solar cell performance and stability.
図・表・数式 / Figures, Tables and Equations
Fig.1 Schematic structure of the solar cell
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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Dhruba B. Khadka, Defect passivation in methylammonium/bromine free inverted perovskite solar cells using charge-modulated molecular bonding, Nature Communications, 15, (2024).
DOI: https://doi.org/10.1038/s41467-024-45228-9
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Dhruba B. Khadka, Advancing Efficiency and Stability of Lead, Tin, and Lead/Tin Perovskite Solar Cells: Strategies and Perspectives, Solar RRL, 7, (2023).
DOI: https://doi.org/10.1002/solr.202300535
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Dhruba B. Khadka, Alleviating Defect and Oxidation in Tin Perovskite Solar Cells Using a Bidentate Ligand, Chemistry of Materials, 35, 4250-4258(2023).
DOI: https://doi.org/10.1021/acs.chemmater.3c00243
口頭発表、ポスター発表および、その他の論文 / Oral Presentations etc.
- D. B. Khadka, Y. Shirai, M. Yanagida, K. Miyano, Effect of Bidentate Ligand Additive in Tin Perovskite Solar Cells, 50th IEEE Photovoltaic Specialists Conference (PVSC), 11th -17th June, 2023, Puerto Rico, USA, Poster Presentation. Poster Presentation.
- D. B. Khadka, Y. Shirai, M. Yanagida, K. Miyano, Modulating Efficiency and stability of Methylammonium/Br-Free Perovskite Solar Cells Using Fluoroarene Hydrazine, 50th IEEE Photovoltaic Specialists Conference (PVSC), 11th -17th June, 2023, Puerto Rico, USA, Poster Presentation. Poster Presentation.
- D. B. Khadka, Y. Shirai, M. Yanagida, K. Miyano, Bidentate Ligand Additive Tin Perovskite Solar Cells, The Japan Photovoltaic Society, 29th -30th June 2023, Kyoto, Japan, Poster Presentation.
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