CdS-Based Interface Engineering for 1.7 V Voltage Vacuum-Deposited Inorganic Perovskite Solar Cells

IF 5.4 3区材料科学 Q2 CHEMISTRY, PHYSICAL

ACS Applied Energy Materials Pub Date : 2024-11-18 DOI:10.1021/acsaem.4c0219410.1021/acsaem.4c02194

Arkadi Akopian, Purnendu Kartikay*, Shadab Soomro, Saba Sharikadze, Ranjith Kottokkaran and Vikram L. Dalal*,

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Abstract

All-inorganic cesium lead bromide (CsPbBr₃) perovskite solar cells (PSCs) have gained significant attention due to their superior stability compared to that of organic–inorganic hybrid devices. In this study, we employ a vacuum-deposited cadmium sulfide (CdS) interfacial layer to address the challenge of achieving a high open-circuit voltage (V_oc) in vacuum-deposited CsPbBr₃ PSCs. Incorporating a thin layer of CdS between the electron transport layer (ETL) and the inorganic perovskite absorber enhances the V_oc to 1.7 V, along with the power conversion efficiency (PCE) increase from 7.8% to 8.4%. Moreover, adding this interfacial layer improves the charge extraction by potentially reducing grain boundary recombination centers via enlarging perovskite grain sizes. Our results show the average perovskite grain size increases from 4 μm to 6 μm on CdS incorporated samples compared to the control. This work reveals the potential of using CdS as a passivation layer to improve charge extraction characteristics by minimizing bimolecular recombinations.

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用于 1.7 V 电压真空沉积无机 Perovskite 太阳能电池的基于 CdS 的界面工程技术

全无机铯-溴化铅（CsPbBr3）钙钛矿太阳能电池（PSCs）由于其与有机-无机杂化器件相比具有优越的稳定性而受到广泛关注。在本研究中，我们采用真空沉积的硫化镉（cd）界面层来解决在真空沉积的CsPbBr3 PSCs中实现高开路电压（Voc）的挑战。在电子传输层（ETL）和无机钙钛矿吸收剂之间加入一层薄薄的CdS，将Voc提高到1.7 V，功率转换效率（PCE）从7.8%提高到8.4%。此外，添加该界面层可以通过增大钙钛矿晶粒尺寸来减少晶界复合中心，从而改善电荷提取。结果表明，与对照组相比，镉掺杂样品的钙钛矿平均晶粒尺寸从4 μm增加到6 μm。这项工作揭示了使用CdS作为钝化层的潜力，通过减少双分子重组来改善电荷提取特性。

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来源期刊

ACS Applied Energy Materials Materials Science-Materials Chemistry

CiteScore

10.30

自引率

6.20%

发文量

1368

期刊介绍： ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.