Perovskite Grain‐Boundary Manipulation Using Room‐Temperature Dynamic Self‐Healing “Ligaments” for Developing Highly Stable Flexible Perovskite Solar Cells with 23.8% Efficiency

Abstract

Figure 5. Stability test of the unencapsulated flexible pero-SCs based on Pero-C, Pero-N, and Pero-I a) versus bending cycles at a radius of 5 mm, b) and at MPP under a 100 mW cm −2 white light-emitting diode stored in an N 2 atmosphere. c) Summary of the comprehensive device performance of the flexible pero-SCs with PCEs >22.5%.

Critical role of 1D materials in realizing efficient and stable perovskite solar cells

“…Notorious defects always exist in GBs and inside of perovskite filmS, leading to nonradiative recombination and resulting inferior performance of PSCs. 4,82,92–94 Thus, effectively passivating defects to reduce nonradiative recombination and improve PCE has always been a focus of science researchers. 95 Fan and co-authors first reported bulk 1D/3D perovskite heterojunctions by introducing 2-(1 H -pyrazol-1-yl)pyridine (PZPY) into the 3D perovskite precursor solution.…”

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

“…7–9 Although the PCEs of f-PSCs have been greatly improved, their efficiency significantly lags behind that of their rigid counterparts. 10–13…”

Performance Enhancement of Flexible Perovskite Solar Cells Enabled by Ammonium Halide Passivation

“…These merits ensure the feasibility of making flexible PSCs (f-PSCs). At present, the highest PCE of f-PSCs is 23.84%, and f-PSCs can be achieved by the two-step sequential deposition method …”

“…At present, the highest PCE of f-PSCs is 23.84%, and f-PSCs can be achieved by the two-step sequential deposition method. 9 The cations in the ideal ABX 3 cubic perovskite lattice are surrounded by symmetrically coordinated BX 6 octahedrons without any crystal defects. 4 However, in the actual preparation process, the growth of perovskite crystals is mainly promoted through solution treatment and high-temperature annealing, so defects are inevitably formed during the rapid grain growth and continuous deposition of films.…”