Crystallization Tailoring for Efficient and Stable Perovskite Solar Cells Via Introduction of Propionic Acid in a Green Anti-Solvent

Raeisi, Shayesteh; Mohammadi, Mohadese; Hoseini, Alireza; Dashti, Mohammadreza; Heidary, Zahra

doi:10.1007/s11664-022-10120-z

Cited by 3 publications

(3 citation statements)

References 44 publications

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“…In terms of nucleation, steric hindrance along the perovskite surface plays a critical role in determining the size of the intermediate phase. In this work, the introduction of CsPFPA in the precursor solution allows Cs cations to contribute to the formation of perovskites, while PFPA anions may not be incorporated into the perovskite lattice due to their relatively large volume. , The carboxylate in the PFPA anion can bind to the perovskite crystal, while the alkyl chain in the PFPA anion creates steric hindrance, which could assist in limiting the size of the perovskite. When an antisolvent is introduced, it can regulate the film formation process by producing intermediate nuclei, whose size can be affected by the type of antisolvents due to the different steric hindrance of antisolvents.…”

Section: Resultsmentioning

confidence: 99%

Synergistic Steric Effect of Precursor And Antisolvent Enables Strongly Confined Perovskite Films with Efficient and Spectral Stable Blue Emission

Qi,

Tong,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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Reducing the crystal size of perovskites to the strong quantum confinement regime is an effective way to realize blue luminescence for light-emitting applications. However, challenges remain in directly constraining the crystal growth during film preparation to achieve three-dimensional quantum confinement, and the widely used long-chain ligands may bring difficulties for charge transport and unfavorably affect the device performance. Herein, we report a novel strategy for fabricating strongly confined blue-emitting perovskite nanocrystalline films via synergistic steric effect modulation by precursors and antisolvents. We synthesize cesium pentafluoropropanoate (CsPFPA) as a new type of precursor agent, where the steric effect of the PFPA group can help constrain the growth of perovskite crystals and passivate the defects. Furthermore, different types of antisolvents with varied molecular sizes and steric hindrance are used to regulate the size of perovskite crystals and improve film quality. Consequently, highly emissive blue perovskite films are realized with the emission wavelength effectively tuned in the blue region by varying the concentration of CsPFPA as well as the type of antisolvents. Based on the strongly confined perovskite films, blue light-emitting diodes (LEDs) are constructed, showing good spectral tunability and stability in the electroluminescence. This work demonstrates a novel pathway for developing bright perovskite blue emitters for LEDs, which may potentially advance their future applications in display and lighting.

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Section: Resultsmentioning

confidence: 99%

Synergistic Steric Effect of Precursor And Antisolvent Enables Strongly Confined Perovskite Films with Efficient and Spectral Stable Blue Emission

Qi,

Tong,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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show abstract

“…Given that the Fig. 12 Chemical structures of PECL, 90 PQACl, 91,92 poly-Se-MIBF 4 , 93 PFBT-MI, 94 APC, 97 MACl, 98 PA, 99 Fmoc-Ala-OH, 100 POWTC and POWTF. 101 crystallization of perovskite is a very complex process, various functions have been reported for different ionic additives and perovskite systems, which will be introduced in the following sections.…”

Section: Improvement Of Crystalline Propertymentioning

confidence: 99%

“…82 Raeisi et al demonstrated the passivation effect of carboxylate on uncoordinated Pb 2+ , with the employment of propionic acid (PA) as an additive in the green antisolvent ethyl acetate. 99 Song et al designed an antisolvent additive, Fmoc-Ala-OH, combining multiple functional groups including ammonium, carboxylate, carbonyl and benzene ring. 100 The synergetic passivation effect resulted in a significantly improved PCE from 15.63% to 21.14%.…”

Section: Defect Passivationmentioning

confidence: 99%