グアニジン修飾SAMsと静電協調シナジーによる高効率タンデム適合ペロブスカイト太陽電池
Laijun Liang1, Weidong Zhu1, Zihao Wang1
1State Key Laboratory of Wide-Bandgap Semiconductor Devices and Integrated Technology, Xidian University, Xi'an, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|December 27, 2025
まとめ
本研究では、ペロブスカイト太陽電池(PSC)を強化するためにポリヘキサメチレングアニジン塩酸塩(PHMG)を導入する。この添加剤は安定性と効率を向上させ、PSCおよびタンデムデバイスで記録的な電力変換効率を達成する。
科学分野:
- 材料科学
- 再生可能エネルギー
- 太陽光発電
背景:
- 広帯域ギャップ逆型ペロブスカイト太陽電池(PSC)は、安定性とタンデム応用において有望です。
- 課題には、自己組織化単分子膜(SAM)の不均一性と界面欠陥の不十分なパッシベーションが含まれます。
研究 の 目的:
- 広帯域ギャップ逆型PSCの安定性と効率を向上させること。
- 新規添加剤を使用してSAMの不均一性と界面欠陥の問題に対処すること。
主な方法:
- 4-(7H-ジベンゾ[c,g]カルバゾール-7-イル)ホスホン酸(4PADCB)SAMへの添加剤としてポリヘキサメチレングアニジン塩酸塩(PHMG)を組み込むこと。
- PHMG、4PADCB、およびペロブスカイト間の相乗的な静電協調効果の調査。
- 最適化されたPSCおよびペロブスカイト/シリコンタンデム太陽電池の作製と特性評価。
主要な成果:
- 最適化されたバンドギャップ1.68 eVのPSCは、記録的な電力変換効率(PCE)23.62%を達成しました。
- デバイスは優れた安定性を示し、85℃で1300時間の経時安定性試験後も95%以上の効率を維持しました。
- 統合されたPSCは、記録的なPCE32.49%(ラミネートタンデム)および32.25%(1 cm²単体タンデム)を達成しました。
結論:
- PHMG添加剤は、PSCにおけるSAM凝集を効果的に抑制し、界面欠陥を低減します。
- 相乗効果はペロブスカイト結晶化を強化し、欠陥密度を低減し、エネルギー準位の整合を改善します。
- このアプローチは、PSCおよびタンデム太陽電池の性能と安定性を大幅に進歩させます。
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