Polymeric hole-transporting material with a flexible backbone for constructing thermally stable inverted perovskite solar cells

Abstract

The explored p-i-n inverted architectural perovskite solar cells (i-PSCs) show promising applications in flexible, large-scale and laminated photovoltaic technology. The polymeric HTMs for i-PSCs have been rarely reported. Thus far,...

Hollow Multishell-Structured TiO2/MAPbI3 Composite Improves Charge Utilization for Visible-Light Photocatalytic Hydrogen Evolution

“…Organic–inorganic hybrid perovskites with outstanding light absorption capability and excellent photoelectronic properties have demonstrated good performance in solar cells, − light-emitting diodes, , photocatalysis, − and so forth. As a promising candidate, methylammonium lead iodide perovskite (MAPbI 3 ) was first utilized as a photocatalyst for producing H 2 through solar-driven HI splitting by Park et al in 2016, which promotes the research on photocatalytic H 2 generation with halide perovskite-based materials. − However, alleviating charge recombination within MAPbI 3 still remains a great challenge.…”

A Multifunctional Fluorinated Polymer Enabling Efficient MAPbI3-Based Inverted Perovskite Solar Cells

“…Tapping-mode atomic force microscopy (AFM) was used to investigate the HTM film morphology. As depicted in Figure b, compared to PTAA of 3.18 nm reported in our previous work, all polymer films exhibited more smooth and homogeneous surfaces with the pimping root-mean-square roughness ( R q ) at a ranging of 1.21 nm∼ 2.12 nm, in favor of the following spin-coating process of perovskite precursor. Subsequently, the perovskite precursor (MAPbI 3 ) contact angles on the surface of HTMs were measured to estimate the wettability.…”

“…26,27 1 H NMR and 13 C NMR spectra were used to determine the structure of the intermediate small molecule (Z5) as described in SI Figures S10 and S11, respectively, which have been reported in our previous work. 44 The structures of the prepared polymers were confirmed by Fourier transform infrared spectroscopy (FTIR). As probed in Figure 2a, the stretching vibration of "−OH" group for the intermediate Z5 was centered at 3450 cm −1 , which disappeared after polymerization.…”

“…1 H NMR and 13 C NMR spectra were used to determine the structure of the intermediate small molecule (Z5) as described in SI Figures S10 and S11, respectively, which have been reported in our previous work . The structures of the prepared polymers were confirmed by Fourier transform infrared spectroscopy (FTIR).…”

Rational Design of Ferroelectric 2D Perovskite for Improving the Efficiency of Flexible Perovskite Solar Cells Over 23 %

“…Firstly, in contrast to rigid PSCs, the significant difference in surface energies between the flexible substrate and perovskite precursor solution causes inhomogeneous perovskite crystallization with poor surface coverage. [3] Additionally, the relatively low built-in electric field (BEF) in the device is unable to provide driving force for sufficient exciton dissociation. Due to the internal and surface defects caused by the poor film formation process, the electron-hole pairs are prone to non-radiative recombination before extracted by the corresponding charge transporting layers, leading to undesired energy losses in f-PSCs.…”