Effect of bromine on the formation of δ-CsPbI3 in Cs0.22FA0.78Pb(I1-xBrx)3 perovskite solar cells

IF 2.4 4区物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Current Applied Physics Pub Date : 2024-09-10 DOI:10.1016/j.cap.2024.09.005

Muntae Hwang, Il-Wook Cho, Jaewon Oh, Hyunbok Lee, Mee-Yi Ryu

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Abstract

Applying Cs_xFA_1-xPbI₃ perovskite is a useful strategy for synthesizing high-efficiency organic-inorganic lead halide perovskite solar cells because it improves the stability of the perovskite structure. High concentration of cesium (Cs) in CsFAPbI₃ synthesized under ambient conditions typically lead to phase separation due to δ-CsPbI₃ formation and moisture, thereby reducing light absorption and increasing non-radiative recombination. To counter this, we fabricated the mixed halide Cs_0.22FA_0.78Pb(I_1-xBr_x)₃ perovskite films. Introducing bromine (Br) content effectively reduced the δ-CsPbI₃ formation and grain boundaries, thus suppressing the non-radiative recombination between perovskite and charge transport layers. Employing this approach, our perovskite solar cells with a 10 % Br concentration achieved a power conversion efficiency of 15.81 %. This demonstrates the potential of Br incorporation in enhancing the stability and efficiency of perovskite solar cells.

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溴对 Cs0.22FA0.78Pb(I1-xBrx)3 包晶太阳能电池中 δ-CsPbI3 形成的影响

应用 CsxFA1-xPbI3 包晶是合成高效有机无机卤化铅包晶太阳能电池的有效策略，因为它能提高包晶结构的稳定性。在环境条件下合成的 CsFAPbI3 中，高浓度的铯（Cs）通常会因δ-CsPbI3 的形成和受潮而导致相分离，从而降低光吸收并增加非辐射重组。为此，我们制作了混合卤化物 Cs0.22FA0.78Pb(I1-xBrx)3 包晶薄膜。溴（Br）的引入有效地减少了δ-CsPbI3 的形成和晶界，从而抑制了包晶和电荷传输层之间的非辐射性重组。采用这种方法，我们的溴浓度为 10% 的包晶太阳能电池的功率转换效率达到了 15.81%。这证明了掺入溴元素在提高包晶石太阳能电池稳定性和效率方面的潜力。

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来源期刊

Current Applied Physics 物理-材料科学：综合

CiteScore

4.80

自引率

0.00%

发文量

213

审稿时长

33 days

期刊介绍： Current Applied Physics (Curr. Appl. Phys.) is a monthly published international journal covering all the fields of applied science investigating the physics of the advanced materials for future applications. Other areas covered: Experimental and theoretical aspects of advanced materials and devices dealing with synthesis or structural chemistry, physical and electronic properties, photonics, engineering applications, and uniquely pertinent measurement or analytical techniques. Current Applied Physics, published since 2001, covers physics, chemistry and materials science, including bio-materials, with their engineering aspects. It is a truly interdisciplinary journal opening a forum for scientists of all related fields, a unique point of the journal discriminating it from other worldwide and/or Pacific Rim applied physics journals. Regular research papers, letters and review articles with contents meeting the scope of the journal will be considered for publication after peer review. The Journal is owned by the Korean Physical Society.