Improved charge extraction in inverted perovskite solar cells with dual-site-binding ligands

IF 44.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Science Pub Date : 2024-04-11 DOI:10.1126/science.adm9474

Hao Chen, Cheng Liu, Jian Xu, Aidan Maxwell, Wei Zhou, Yi Yang, Qilin Zhou, Abdulaziz S. R. Bati, Haoyue Wan, Zaiwei Wang, Lewei Zeng, Junke Wang, Peter Serles, Yuan Liu, Sam Teale, Yanjiang Liu, Makhsud I. Saidaminov, Muzhi Li, Nicholas Rolston, Sjoerd Hoogland, Tobin Filleter, Mercouri G. Kanatzidis, Bin Chen, Zhijun Ning, Edward H. Sargent

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Abstract

Inverted (pin) perovskite solar cells (PSCs) afford improved operating stability in comparison to their nip counterparts but have lagged in power conversion efficiency (PCE). The energetic losses responsible for this PCE deficit in pin PSCs occur primarily at the interfaces between the perovskite and the charge-transport layers. Additive and surface treatments that use passivating ligands usually bind to a single active binding site: This dense packing of electrically resistive passivants perpendicular to the surface may limit the fill factor in pin PSCs. We identified ligands that bind two neighboring lead(II) ion (Pb²⁺) defect sites in a planar ligand orientation on the perovskite. We fabricated pin PSCs and report a certified quasi–steady state PCE of 26.15 and 24.74% for 0.05– and 1.04–square centimeter illuminated areas, respectively. The devices retain 95% of their initial PCE after 1200 hours of continuous 1 sun maximum power point operation at 65°C.

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利用双位点结合配体改善倒置过氧化物太阳能电池中的电荷提取

反相（针型）过氧化物太阳能电池（PSCs）的工作稳定性比其压区同类产品有所提高，但在功率转换效率（PCE）方面却落后于压区同类产品。造成针式 PSC 功率转换效率不足的能量损失主要发生在包晶和电荷传输层之间的界面上。使用钝化配体的添加剂和表面处理通常与单个活性结合位点结合：这种垂直于表面的电阻性钝化剂密集堆积可能会限制针状 PSC 的填充因子。我们发现配体能在包晶上的平面配体方向上结合两个相邻的铅（II）离子（Pb2+）缺陷位点。我们制造出了针状 PSC，并报告称，在 0.05 平方厘米和 1.04 平方厘米的照明区域内，经认证的准稳态 PCE 分别为 26.15% 和 24.74%。这些器件在 65°C 下连续工作 1200 小时（1 个太阳最大功率点）后，仍能保持 95% 的初始 PCE。

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来源期刊

Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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