14.7% 効率 有機光伏電池 活性材料によって作動し,静電電位差が大きい
Huifeng Yao1, Yong Cui1,2, Deping Qian3
1Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, CAS Research/Education Center for Excellence in Molecular Sciences , Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190 , P. R. China.
Journal of the American Chemical Society
|April 25, 2019
まとめ
研究者らは,新しい材料PTO2とIT-4Fを使用して,有機光伏電池 (OPV) で14.7%の電力変換効率を達成しました. この突破は,低駆動力での効率的な充電生成を可能にし,OPVの性能を改善する道を開きます.
科学分野:
- 材料科学
- 太陽光発電
- オーガニック電子
背景:
- 有機太陽電池 (OPV) は有望ですが,商用太陽電池の電力変換効率に遅れがあります.
- OPVの主要な課題は,光生成された電子穴ペアを分離するために必要な高いエネルギーです.
- 効率的な電荷分離メカニズムの開発は,OPV技術の進歩に不可欠です.
研究 の 目的:
- 高効率の単一結合有機光電池 (OPV) を実証する.
- 特定の材料を用いて,低い駆動力での電荷生成メカニズムを調査する.
- OPV性能の向上における分子静電電位 (ESP) の役割を探求する.
主な方法:
- 新しいポリマードナー (PTO2) と非フルレンの受容体 (IT-4F) を使用した単一結合OPVの製造と試験.
- 超高速吸収スペクトロスコーピーは,電荷ペアダイナミクスと再結合を研究します.
- 分子静電電位 (ESP) と分子間電場を分析するための理論研究.
主要な成果:
- 単発OPVで 14.7%の電力変換効率を達成しました.
- 低駆動力で効率的な電荷生成を証明した.
- リコンビネーションを減少させ,寿命を延長した緩い結合のチャージペアの形成が観察された.
- 理論分析では,PTO2とIT-4Fの間の大きな分子ESPが,潜在的に電荷生成を助長することを示した.
結論:
- 新しいポリマードナーPTO2と非フルレンの受容体IT-4Fにより,高効率のOPVが可能になります.
- 低駆動力の電荷分離は達成可能であり,デバイスの性能を改善します.
- 分子静電電位 (ESP) 調節は,OPVの効率をさらに高めるための有望な戦略です.
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