Chemical Stabilization of Perovskite Solar Cells with Functional Fulleropyrrolidines

Abstract

While perovskite solar cells have invigorated the photovoltaic research community due to their excellent power conversion efficiencies (PCEs), these devices notably suffer from poor stability. To address this crucial issue, a solution-processable organic chemical inhibition layer (OCIL) was integrated into perovskite solar cells, resulting in improved device stability and a maximum PCE of 16.3%. Photoenhanced self-doping of the fulleropyrrolidine mixture in the interlayers afforded devices that were advantageously insensitive to OCIL thickness, ranging from 4 to 190 nm. X-ray photoelectron spectroscopy (XPS) indicated that the fulleropyrrolidine mixture improved device stability by stabilizing the metal electrode and trapping ionic defects (i.e., I–) that originate from the perovskite active layer. Moreover, degraded devices were rejuvenated by repeatedly peeling away and replacing the OCIL/Ag electrode, and this repeel and replace process resulted in further improvement to device stability with minimal variation of device efficiency.

Self‐Assembled Fullerene Nanostructures: Synthesis and Applications

“…A power conversion efficiency of up to 15.21% was achieved with this system. Liu et al [85] have designed a perovskite solar cell based on CH 3 NH 3 PbI 3 and used fulleropyrrolidines as a chemical inhibition layer. The presence of the latter enhances the overall stability of the perovskite device.…”

High-performance organic thin-film transistors: principles and strategies

“…Two different architectures were employed, tailored to the OSC type: BTBT derivatives (C8-BTBT and DPhBTBT) and DNTT derivatives (C10-DNTT and PH-DNTT), respectively. For BTBT derivatives C8-BTBT and DPhBTBT, F4-TCNQ 50,51 was employed to achieve strong p-type molecular doping at the interface between the OSC layer and the gold source/drain electrode. Mobility improvements ranged from a 1.5-fold increase for C8-BTBT to a 20-fold increase for C10-DNTT.…”

Unveiling Electron Dose-Induced Phase Decomposition and Energy Kinetics in Cu-Doped CsPbI3 Nanocrystals

“…occupying the A and B sites, respectively, while halide ions (Cl – , Br – , I – ) , cover the X sites. Especially, all-inorganic LHP films have been found to exhibit more than 20% efficiency to date in a single-junction solar cell, thus demonstrating their remarkable potential in photovoltaic applications. − Despite being promising materials with a defect-tolerant nature, it is difficult to commercialize perovskite-based devices because of their poor stability under practical and harsh operating conditions as compared to robust silicon devices. − Hence, to harness the full potential of LHPs in energy-harvesting devices, a detailed understanding of their structural properties at the atomic scale is necessary. In this regard, electron microscopy, in particular transmission electron microscopy (TEM), has been extensively used to explore nanoscale properties of perovskites .…”