Overcoming the Open-Circuit Voltage Losses in Narrow Bandgap Perovskites for All-Perovskite Tandem Solar Cells.

IF 9.6 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY ACS Materials Letters Pub Date : 2024-10-23 eCollection Date: 2024-11-04 DOI:10.1021/acsmaterialslett.4c01699

Yekitwork Abebe Temitmie, Muhammad Irfan Haider, Daniele T Cuzzupè, Lucia V Mercaldo, Stefan Kraner, Paola Delli Veneri, Amare Benor, Azhar Fakharuddin, Lukas Schmidt-Mende

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Abstract

Narrow-bandgap (NBG) perovskite solar cells based on tin-lead mixed perovskite absorbers suffer from significant open-circuit voltage (V _OC) losses due primarily to a high defect density and charge carrier recombination at the device interfaces. In this study, the V _OC losses in NBG perovskite single junction cells (E _g = 1.21 eV) are addressed. The optimized NBG subcell is then used to fabricate highly efficient all-perovskite tandem solar cells (TSCs). The improvement in the V _OC is achieved via the addition of a thin poly(triarylamine) interlayer between the poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS)-based hole transport layer (HTL) and the NBG perovskite. The optimal bilayer HTL results in a champion power conversion efficiency (PCE) of 20.3%, compared to 17.8% of the PEDOT:PSS-based control device. The V _OC improvement of the single-junction NBG cell is also successfully transferred to all-perovskite TSC, resulting in a high V _OC of 2.00 V and a PCE of 25.1%.

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克服窄带隙过氧化物的开路电压损耗，实现全过氧化物串联太阳能电池。

基于锡铅混合包晶石吸收体的窄带隙（NBG）包晶石太阳能电池存在严重的开路电压（V OC）损耗，这主要是由于器件界面的高缺陷密度和电荷载流子重组造成的。本研究探讨了 NBG 包晶单结电池（E g = 1.21 eV）的 V OC 损耗。优化后的 NBG 子电池被用于制造高效的全过氧化物串联太阳能电池 (TSC)。通过在聚(3,4-亚乙二氧基噻吩)聚(苯乙烯磺酸)（PEDOT:PSS）为基础的空穴传输层（HTL）和 NBG 过氧化物之间添加一层薄的聚(三芳基胺)夹层，实现了 V OC 的改善。最佳双层 HTL 使冠军功率转换效率 (PCE) 达到 20.3%，而基于 PEDOT:PSS 的控制器件的转换效率仅为 17.8%。单结 NBG 电池的 V OC 改进也成功地转移到了全过氧化物 TSC 上，从而实现了 2.00 V 的高 V OC 和 25.1% 的 PCE。

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.

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