<i>In situ</i> dipole formation to achieve high open-circuit voltage in inverted perovskite solar cells <i>via</i> fluorinated pseudohalide engineering
Yuan Liu, Chen Tang, Anxin Sun, Rongshan Zhuang, Yiting Zheng, Congcong Tian, Xueyun Wu, Zihao Li, Beilin Ouyang, Jiajun Du, Ziyi Li, Yong Hua, Chun‐Chao Chen
Abstract
and the C-F bond in EMIMTFSI. Finally, the EMIMTFSI-modified p-i-n PSCs achieve an excellent efficiency of 24.81% with an impressive open-circuit voltage of 1.191 V for a 1.57 eV low-bandgap perovskite. In addition, the modified devices can maintain more than 95% PCE after continuous thermal aging at 85 °C for 500 h or illumination at the maximum power point for 800 h. This work provides a new idea for minimizing the non-radiative recombination losses in p-i-n PSCs.
Topics & Concepts
Perovskite (structure)PassivationMaterials sciencePhotoluminescenceOpen-circuit voltageBand gapQuantum yieldEnergy conversion efficiencyDipoleOptoelectronicsPhotochemistryNanotechnologyVoltageChemistryCrystallographyOpticsLayer (electronics)Organic chemistryPhysicsFluorescenceQuantum mechanicsPerovskite Materials and ApplicationsConducting polymers and applicationsQuantum Dots Synthesis And Properties