界面植入卤化碳点构建高效稳定的柔性钙钛矿太阳能电池
The interfacial embedding of halogen-terminated carbon dots pro-duces highly efficient and stable flexible perovskite solar cells
摘要
Abstract
Organic-inorganic hybrid perovskite films made by low-temperature solution processing offer promising opportunities to fabricate flexible solar cells while formidable challenges regarding their environmental and mechanical stability remain due to their ionic and fragile nature. This work explores the possibility of chemical crosslinking between adjacent grains by the interfacial embedding of laser-derived carbon dots with halogen-terminated surfaces to improve the flexibility and stability of the polycrystal-line films. A series of halogen-terminated carbon dots was generated in halobenzene solvents by pulsed laser irradiation in the liquid, and were then placed in the surface and grain boundaries of the perovskite film by an antisolvent procedure, where an immiscible solvent was poured onto the coating surface with a suspension containing carbon dots and perovskite precursors to cause precipita-tion. Strong interaction between perovskite and the carbon dots results in effective defect passivation, lattice anchoring and a change in the carrier dynamics of the perovskite films. Because of this, unencapsulated flexible perovskite solar cells after the interfacial em-bedding have power conversion efficiencies up to 20.26％, maintain over 90％ of this initial value for 90 days under a relative humid-ity of 40％ and have a thermal stability of 200 h even at 85℃. The flexible devices withstand mechanical deformation, retaining over 80％ of their initial values after 500 bend cycles to a radius of curvature of 4 mm.关键词
界面植入/脉冲激光辐照/稳定性/卤化碳点/柔性钙钛矿太阳能电池Key words
Interfacial embedding/Pulsed laser irradiation/Stability/Halogen-terminated carbon dots/Flexible perovskite solar cells分类
化学化工引用本文复制引用
刘晨,贾宁,翟计洲,赵鹏振,郭鹏飞,王洪强..界面植入卤化碳点构建高效稳定的柔性钙钛矿太阳能电池[J].新型炭材料,2022,37(5):988-999,12.基金项目
国家重点研发计划-政府间国际科技创新合作(2021YFE0115100) （2021YFE0115100）
国家自然科学基金(52172101,51972272,51872240) （52172101,51972272,51872240）
凝固技术国家重点实验室(西北工业大学)自主研究课题资助(2022-BJ-05) （西北工业大学）
陕西省重点研发计划(2022KWZ-04,2021ZDLGY14-08) （2022KWZ-04,2021ZDLGY14-08）
中央高校基本科研专项资金(G2022KY0604).This work was financially supported by the project of the National Key R&D Program for Interna-tional Cooperation(2021YFE0115100),National Nat-ural Science Foundation of China(52172101,51972272 and 51872240),Project supported by the Research Fund of State Key Laboratory of Solidifica-tion Processing(NPU),China(2022-BJ-05),Shaanxi Province Key Research and Development Program(2022KWZ-04 and 2021ZDLGY14-08),the Funda-mental Research Funds for the Central Universities(G2022KY0604).The authors would like to thank the Analytical&Testing Center of Northwestern Poly-technical University and Shaanxi Materials Analysis and Research Center for XPS,XRD,SEM and TEM characterizations. （G2022KY0604）
