Governing PbI₆octahedral frameworks for high-stability perovskite solar modules

Abstract

Featuring soft ionic lattices of PbI6 octahedral frameworks, halide perovskites confront multiplicate force-driven structural collapse (e.g., humidity, heat and illumination) initially on the surface and finally in the bulk, and...

Over 24% Efficient Poly(vinylidene fluoride) (PVDF)‐Coordinated Perovskite Solar Cells with a Photovoltage up to 1.22 V

“…[ 24,37 ] Other research proposed the concept that the polymer as the template can modulate the nucleation and growth of perovskite film, but how the polymer modulate the crystallinity process of perovskite remains unclear. [ 33,36,39 ] Furthermore, among various additives, fluorinate additives incorporated into perovskite layer [ 42–44 ] or as the interlayer on top of perovskite [ 45,46 ] facilitate the formation of hydrogen‐fluorine bonds with organic cations, which protects perovskite from moisture.…”

Molecular dipole engineering-assisted strain release for mechanically robust flexible perovskite solar cells

“…Moreover, all F atoms exhibited a negative-charge concentration in the additives, indicating that all additives would facilitate the formation of hydrogen–fluorine bonds with organic cations, which protect perovskite from moisture. 35,36 The dipole moments of additive molecules have been reported to be positively correlated with the coordination between additives and Pb 2+ . 27,37 Fig.…”

Dual‐Interface Modulation with Covalent Organic Framework Enables Efficient and Durable Perovskite Solar Cells

“…The prolonged stability in HS‐COFs modified devices may be attributed to better surface passivation, ultraviolet resistances by COFs, and residual tensile strain release discussed in the following section. [ 40 ] Water contact angle characterization was carried out to investigate the change in surface properties (Figure S6, Supporting Information). The contact angle of HS‐COFs buried (72.3°) or dual‐interface modified (95.1°) film is considerably larger than that of the control film (65.8°), indicating enhanced hydrophobicity to inhibit the invasion of moisture.…”