Organic Additive Engineering to Grow High‐Quality Inorganic CsPbX₃ Perovskite Films for Efficient and Stable Solar Cells

Abstract

Inorganic CsPbX3 (X: Br, I, or their mixture) perovskite solar cells have gained widespread attention due to their superior stability and the steadily increased conversion efficiency. Inorganic CsPbX3 perovskite for solar cell application are usually fabricated by the solution‐processing method. The nature of solution‐processing method and the rapid crystal growth of perovskite lead to the formation of a wide range of defects within CsPbX3 perovskite films, which deteriorate the performance and stability of CsPbX3 devices. Recently, organic additive engineering has been demonstrated to be an effective strategy for improving the perovskite quality. Herein, the recent progress of organic additive engineering to grow high‐quality inorganic CsPbX3 perovskite films for high‐performance solar cells is summarized. The role of organic additives in the formation of inorganic CsPbX3 perovskite films and their effect on the performance of corresponding perovskite solar cells are discussed. In addition, some issues of organic additive engineering that should be deeply understood are summarized, and the research trend on organic additive engineering for further improving the performance of CsPbX3 devices is suggested.

Ferrocene Derivatives for Improving the Efficiency and Stability of MA‐Free Perovskite Solar Cells from the Perspective of Inhibiting Ion Migration and Releasing Film Stress

“…[21][22][23][24] The additive strategy has been proven effective in improving the quality of thin films and the efficiency of devices. [8,25,26] Chen and his co-worker developed a precursor stabilization and defect passivation strategy by employing 3-hydrazinobenzoic acid (3-HBA) containing both carboxyl (−COOH) and hydrazine (−NHNH 2 ) functional groups as a versatile additive. The results show that the introduction of 3-HBA improves the quality of the perovskite film while suppressing the nonradiative recombination in the device.…”

Surface Versus Bulk State Transitions in Inkjet-Printed All-Inorganic Perovskite Quantum Dot Films

“…An area of particular interest due to the troublesome nature of surfaces relates to defects and their role in promoting the exciton recombination process [42]. Many techniques, such as interface engineering [43] composition control via precursor stoichiometry [44] doping strategies [42], and organic additive methods [45] have been utilized in an attempt to prevent parasitic defects in optical applications by passivating these high probability recombination sites. The origins of the recombination process can be difficult to pinpoint and often presents contention in the literature.…”