A polymer scaffold for self-healing perovskite solar cells

Abstract

Advancing of the lead halide perovskite solar cells towards photovoltaic market demands large-scale devices of high-power conversion efficiency, high reproducibility and stability via low-cost fabrication technology, and in particular resistance to humid environment for long-time operation. Here we achieve uniform perovskite film based on a novel polymer-scaffold architecture via a mild-temperature process. These solar cells exhibit efficiency of up to ∼16% with small variation. The unencapsulated devices retain high output for up to 300 h in highly humid environment (70% relative humidity). Moreover, they show strong humidity resistant and self-healing behaviour, recovering rapidly after removing from water vapour. Not only the film can self-heal in this case, but the corresponding devices can present power conversion efficiency recovery after the water vapour is removed. Our work demonstrates the value of cheap, long chain and hygroscopic polymer scaffold in perovskite solar cells towards commercialization.

Recent Progress on the Long‐Term Stability of Perovskite Solar Cells

“…Zhao et al designed a novel perovskite solar cell architecture fabricated based on a long‐chain hygroscopic polyethylene glycol (PEG) polymer‐scaffold structure 93. The homogeneous morphology of the polymer‐scaffold perovskite films was successfully achieved with a highest PCE of 16% and high reproducibility.…”

MgO Nanoparticle Modified Anode for Highly Efficient SnO2‐Based Planar Perovskite Solar Cells

“…Perovskite solar cells (PSCs) have attracted considerable research interest because of their excellent photovoltaic performance and simple fabrication process 1, 2. Perovskite materials have many advantages such as excellent charge‐carrier mobility, effective ambipolar charge transfer, and high optical absorption coefficient.…”

The Effect of Solvents on the Performance of CH3NH3PbI3 Perovskite Solar Cells

“…At present, PSC structures can be mainly divided into two species: conventional structures, which originated from the concept of dye-sensitized solar cells [4][5][6][7], and inverted structures, which originated from the concept of organic solar cells (OSCs) [8][9][10][11][12][13][14]. Conventional structures are composed of a transparent conductive oxide (TCO) substrate/electron transport layer (ETL)/perovskite layer/hole transport layer (HTL)/anode, whereas inverted structures are composed of a TCO substrate/HTL/perovskite layer/ETL/cathode.…”