Deuterated N,N-dimethylformamide (DMF-d7) as an additive to enhance the CsPbI₃ solar cell efficiency

Abstract

Typically, DMSO and DMF are the two most commonly used co-solvents, however, their boiling points differ greatly and the volatilization rate is not consistent when the film is annealed and...

Solvent-Treated Zirconium-Based Nanoporous UiO-66 Metal–Organic Frameworks for Enhanced CO2 Capture

“…The UiO-66-DMF-48h (blue line) displayed multiple positive peaks, related to DMF molecules, suggesting the more DMF existing in the UiO-66 pores with enhanced corresponding signals. As marked with starts, the peaks at 2928 cm –1 (C–H stretching), 1670 cm –1 (CO stretching), 1500, 1380, 1250, and 1096 cm –1 (C–N stretching), , matched well with the specific peaks of pure DMF solvent (black dash line). It demonstrates that the enhanced peaks over the UiO-66-DMF-48h sample were from DMF molecules.…”

Guanidium-assisted crystallization engineering for highly efficient CsPbI3solar cells

“…The corresponding curves were fitted by biexponential decay function [Time ( τ i ) and amplitudes ( A i )]. 56 The average carrier lifetime ( τ ave ) was calculated by τ ave = Σ A i τ i 2 /Σ A i τ i . 35 It can be obtained that the film (3%) has a much shorter τ ave of 3.853 ns than the film (0%) (7.189 ns).…”

Molecular design for perovskite solar cells

“…(4) Solvent combination is another feasible approach to further modify the intermediates and the perovskite crystallization process 132,133 . For example, the addition of DMSO is considered to slow down the crystallization process of PbI 2 in DMF when both are incorporated in the precursor solution 134,135 . (5) Green solvent such as alcohol is desired despite the slightly lower performance compared with the traditional DMSO and DMF that are considered to cause health issues; interestingly, switching to the ethanol solvent is also feasible because of their desired polarity that can stabilize the perovskite layer 136‐139 .…”