No anti-solvent required for perovskite cells

How to reduce the cost of perovskite solar cells?

This work not only provides a simple choice for lowering the cost of perovskite solar cells by efficiently purifying the low-purity PbI 2 but also proposes that the combination of D N value and Hansen solubility parameter is a powerful tool for the selective crystallization of PbI 2 and perovskite.

Is perovskite a good material for solar cell devices?

The film quality of perovskite is significantly improved and solar cell device performance is boosted from ∼ 18.69 % to 23.91 %, which is the highest value ever reported for PSCs made from purified low-purity PbI 2. Moreover, the reproducibility and stability of solar cell devices are also greatly improved.

How can antisolvent-free perovskite solar cells improve power conversion efficiency?

Essentially, this involves the synergistic effects of additives to reduce energy and modulate intermediates phase. After optimization, the power conversion efficiency of antisolvent-free perovskite solar cells reaches 22.4%. 1. Introduction

Why do control perovskite films have small grains and pinholes?

In sharp contrast, the control perovskite film displays small-size grains and obvious pinholes. It is precisely because of the rapid crystallization in conventional antisolvent-free methods. This suggests that the introduction of binary additives can easily induce the formation of compact films after the ripening process in region III.

How does a pre-nucleated perovskite molecule affect the absorption rate?

Moreover, the presence of a certain amount of large-sized colloids or pre-nucleated perovskite species in the precursor ink contributes to an oversaturated state of the precursor solution, leading to a faster nucleation rate and thus enabling earlier absorption changes.

Can additives improve the crystallization of perovskite thin films?

In summary, in a one-step process without antisolvent system, the intermediate phases modulated by additives can regulate the crystallization process, enhance the crystallinity of perovskite thin films, and ultimately yield uniform perovskite thin films, thus rivaling systems that incorporate with antisolvent (Table S1).