Synergistic Effect of Additive and Solvent Vapor Annealing on the Enhancement of MAPbI₃ Perovskite Solar Cells Fabricated in Ambient Air

Abstract

To date, most high-performance perovskite solar cells (PSCs) are fabricated in an inert or vacuum condition to circumvent the moisture effect, which is one of the leading causes of sparse crystal nucleation and nonuniform morphology. Therefore, it is crucial to develop a simple approach to deposit a uniform and homogeneous perovskite on a planar substrate in ambient air for the mass production of PSCs. Herein, we investigated the synergistic effect of additive 1,8-diiodooctane (DIO) and solvent vapor annealing (SVA) treatments on the performance of PSCs fabricated in ambient air. It was found that the addition of 1 vol % DIO together with SVA treatment results in the enhancement of the perovskite film's crystallinity, grain size, and photophysical properties. PSCs containing 1 vol % DIO additive and SVA treatment exhibited a power conversion of efficiency (PCE) of 17.04%, which is markedly higher than the control device with a PCE of 10.61%. The results indicate that the additive DIO and SVA can work together to significantly improve the performance of PSCs fabricated in ambient air. This work provides a promising route for developing high-performance PSCs in the ambient environment.

Stable 2D Alternating Cation Perovskite Solar Cells with Power Conversion Efficiency >19% via Solvent Engineering

“…The photoluminescence (PL) spectra of the two films exhibit a dominant emission peak at ≈765 nm close to that of the MAPbI 3 bulk phase (Figure 2e). [ 49 ] However, direct emission from low‐ n QWs was difficult to observe, which is in contrast to that for the (GA)(MA) n Pb n I 3 n +1 (< n > = 3) film. [ 17 ] The DMSO‐assisted reduction in trap density within films is well reflected in the evolution of carrier lifetime, which was determined from time‐resolved PL (TRPL) measurements (Figure 2f).…”

A novel 3-methylthiophene additive to boost the performance and stability of perovskite solar cells

“…Inset of (a) represents the contact-angle measurement of perovskite films with and without additive. 40 Ambient air One-step DIO MAPbI 3 60% Not reported Nian et al 41 Nitrogen glovebox One-step GuSCN MAPbI 3 7% z10% loss aer 350 h test in ambient humidity in air without encapsulation Ying et al 42 Not It is worth noting that the achieved ndings revealed that the design of PSCs employing the MTP treatment in ambient air could enhance the PCE and stability of the MAPbI 3 -based solar cells, which is a step forward in PSC commercialization. Based on the comparison of the results listed in Table 2, it can be argued that the most benecial approach for MTP usage in PSCs is incorporating it into the MAI solution, as reported here.…”

The disappearing additive: introducing volatile ethyl acetate into a perovskite precursor for fabricating high efficiency stable devices in open air

“…8,9 Furthermore, it is figured out that the uncoordinated Pb sites at the surface can be effectively passivated by electron donors or Lewis bases through the medium of chemical interaction, which could saturate the lead coordination sphere to control nucleation and reaction processes of perovskite grains. [10][11][12] However, for avoiding the erosion of oxygen and gaseous water, most of these devices were fabricated in nitrogen or other inert gases-filled gloveboxes, which is expensive as well as inapplicable for industrial manufacturing. These greatly increase the cost of preparation and do not comply with the concept of green chemistry.…”