Deuterium-substituted cations enhance perovskite solar cell efficiency and stability

IF 38.6 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Joule Pub Date : 2025-07-08 DOI:10.1016/j.joule.2025.102031

Jiazhi Meng, Yu Gao, Junnan Hu, Chengcheng Wu, Yuan Li, Si-Wei Zhang, Yuou Chen, Ross A. Kerner, Jing Ma, Yang Shen, Xuan Zhang, Feiyu Kang, Barry P. Rand, Guodan Wei

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Abstract

Halide perovskite solar cells with mixed-cation compositions often face instabilities under continuous illumination due to the deprotonation of methylammonium (CH₃NH₃⁺, MA⁺) cations. To address this, we systematically evaluate the partial and complete deuteration of MA⁺ cations. This approach inhibits deprotonation and degradation, reduces the formation energy of the perovskite phase, improves grain growth, passivates defects, and restrains ion migration. As a result, perovskite solar cells incorporating this deuteration strategy achieve exceptional performance, including a high fill factor (FF) of 82.6% and a power conversion efficiency (PCE) of 25.6%. Their modules with a device area of 56 cm² demonstrate remarkable stability, maintaining over 93.7% of their initial PCE after 1,000 h at the maximum power point under continuous illumination at 40°C. This novel deuteration strategy presents a promising approach to enhance both the efficiency and stability of perovskite solar cells.

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氘取代阳离子提高钙钛矿太阳能电池的效率和稳定性

由于甲基铵（CH3NH3+, MA+）阳离子的去质子化，具有混合阳离子组成的卤化物钙钛矿太阳能电池在连续照明下经常面临不稳定性。为了解决这个问题，我们系统地评估了MA+阳离子的部分和完全氘化。这种方法抑制去质子化和降解，降低钙钛矿相的形成能，促进晶粒生长，钝化缺陷，并抑制离子迁移。因此，采用这种氘化策略的钙钛矿太阳能电池获得了卓越的性能，包括82.6%的高填充因子（FF）和25.6%的功率转换效率（PCE）。其器件面积为56平方厘米的模块表现出卓越的稳定性，在40°C的连续照明下，在最大功率点工作1,000小时后，其PCE保持在初始PCE的93.7%以上。这种新的氘化策略为提高钙钛矿太阳能电池的效率和稳定性提供了一种有前途的方法。

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来源期刊

Joule Energy-General Energy

CiteScore

53.10

自引率

2.00%

发文量

198

期刊介绍： Joule is a sister journal to Cell that focuses on research, analysis, and ideas related to sustainable energy. It aims to address the global challenge of the need for more sustainable energy solutions. Joule is a forward-looking journal that bridges disciplines and scales of energy research. It connects researchers and analysts working on scientific, technical, economic, policy, and social challenges related to sustainable energy. The journal covers a wide range of energy research, from fundamental laboratory studies on energy conversion and storage to global-level analysis. Joule aims to highlight and amplify the implications, challenges, and opportunities of novel energy research for different groups in the field.