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熱力学的に安定したβ-CsPbI3ベースのペロブスキート太陽電池
Yong Wang1, M Ibrahim Dar2, Luis K Ono3
1School of Environmental Science and Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai 200240, China.
Science (New York, N.Y.)
|August 10, 2019
まとめ
研究者らは太陽電池用の安定した結晶型β-セシウム鉛ヨウ酸化物 (β-CsPbI3) フィルムを開発した. コリンヨウ素で表面処理すると,効率と安定性が向上し,ペロブスキート太陽電池で18.4%を達成しました.
科学分野:
- 材料科学
- 再生可能エネルギー
- 固体物理学
背景:
- ベータセシウム鉛ヨウ酸化物 (β-CsPbI3) は,タンデム太陽電池に有利な帯域間隔を持っています.
- β-CsPbI3膜の実験的堆積と安定化には大きな課題があります.
研究 の 目的:
- 段階安定性の高い高結晶 β-CsPbI3 フィルムを得る方法を開発する.
- β-CsPbI3ベースのペロブスキート太陽電池の性能と信頼性を向上させるため
主な方法:
- β-CsPbI3フィルムの製造
- 構造分析のためのシンクロトロンベースのX線散乱
- 誘導結合プラズマ質量測定法 (ICP-MS) と飛行時間二次イオン質量測定法 (ToF-SIMS) を用いた元素分析.
- コリンヨウ酸化物で表面処理
主要な成果:
- 拡張スペクトル応答と相安定性の高い高結晶のβ-CsPbI3膜が得られました.
- シンクロトロンX線散射により,高度に指向されたβ-CsPbI3粒子が確認された.
- 元素解析で 完全無機成分が確認されました
- コリンヨウ酸化物の表面処理により膜の欠陥が軽減され,電荷キャリアの寿命が向上し,エネルギーレベルが最適化されました.
- ペロブスキート太陽電池は高温環境 (45°C ± 5°C) で再生可能で安定した効率18.4%を達成しました.
結論:
- 開発された方法は,安定して効率的なβ-CsPbI3ペロブスキート太陽電池の生産を可能にします.
- 表面処理はペロブスキート太陽電池の性能と安定性を高める有効な戦略です.
- この発見は,完全無機ペロブスキート太陽電池技術の実用化に寄与する.
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