New ferrocenyl-containing organic hole-transporting materials for perovskite solar cells in regular (n-i-p) and inverted (p-i-n) architectures

Abstract

New ferrocene-containing organic HTMs for fabricating perovskite solar cells.

Antioxidation and Energy-Level Alignment for Improving Efficiency and Stability of Hole Transport Layer-Free and Methylammonium-Free Tin–Lead Perovskite Solar Cells

“…Therefore, the VBM of the reference and the integration strategy-based perovskite film was calculated to be −5.49 and −5.27 eV, corresponding to a conduction band minimum (CBM) of −4.22 and −4.00 eV, respectively. The energy diagram is shown in Figure b, and the band energy of PCBM is referenced from previous reports. , It is obvious that the integration strategy contributes to a favorable energy alignment between the perovskites and the PCBM layer for efficient electron extraction. The change of band levels possibly results from the effective control of defect-induced Sn 4+ self-doping in Sn–Pb perovskites by the integration strategy. , Therefore, we can conclude that the UV–ozone treatment and the synergistic integration strategy can offer better energy-level alignment at interfaces of ITO/perovskites and perovskites/PC 61 BM, respectively.…”

“…The energy diagram is shown in Figure 4b, and the band energy of PCBM is referenced from previous reports. 43,44 It is obvious that the integration strategy contributes to a favorable energy alignment between the perovskites and the PCBM layer for efficient electron extraction. The change of band levels possibly results from the effective control of defect-induced Sn 4+ selfdoping in Sn−Pb perovskites by the integration strategy.…”

Structural divergence of molecular hole selective materials for viable p-i-n perovskite photovoltaics: a comprehensive review

“…In this context, Xue et al linked biferrocene groups with triphenylamines via triple bonds, and a double bond was also introduced to link a moiety of triphenylamine, bis(4-methoxyphenyl)methane, and 4,4′-methylene bis( N , N -dimethylaniline) to form JW6 ( C7 ), JW7 ( C8 ), and JW8 ( C9 ), respectively. 140 Employing these molecules as HSMs without a dopant in p-i-n PSC devices delivered a moderate PCE of 10.23 to 11.43%, better than the PCE observed from n-i-p PSC devices (∼9.36%) with a doped HSM. Guo et al utilized π-conjugated starburst 4,4,4′′-tris(3- methyl phenylamino) triphenylamine (m-MTDATA, C10 ) as the HSM, 141 which is widely explored in organic light-emitting diodes (OLEDs) and organic field-effect transistors.…”

Binding Strength-Guided Shuttling of Charge Carriers from Perovskite Nanocrystals to Molecular Acceptors

“…in perovskite NCs, which can dictate its excited-state interactions, band energies, and solubility and allow charge transfer, thus affecting both photovoltaics and photocatalysis. Recently, ferrocene (Fc) has proven to be an effective molecule to be paired with perovskites, enhancing charge transfer and separation and playing a key role in passivating surface defects. − It is cost-effective and easily produced, contrasting with the usual studies where dyes or metals are used. Not to mention that a well-thought-out design with Fc is also a desirable addition.…”