Susceptible organic cations enable stable and efficient perovskite solar cells

IF 38.6 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Joule Pub Date : 2025-03-17 DOI:10.1016/j.joule.2025.101879

Jongbeom Kim, Jaewang Park, Jihoo Lim, Jaehui Kim, Junseok Kim, Nahye Shin, Jae Sung Yun, Jino Im, Sang Il Seok

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Abstract

Achieving higher open-circuit voltages and fill factors in perovskite solar cells (PSCs) involves minimizing defects between layers and maximizing carrier extraction and transport. One approach includes integrating a two-dimensional (2D) semiconducting interlayer to form a heterojunction with the perovskite absorber. However, conventional 2D layers often have poor thermal stability due to the migration of organic cations. This study examines the enhancement in power conversion efficiency (PCE) and thermal stability of PSCs by using strong intermolecular interactions between methoxy-phenethylammonium iodide and cyclohexylammonium bromide as chosen organic cations. The resulting 2D/perovskite configuration facilitates efficient charge transfer and demonstrates superior thermal stability at 85°C. The optimized PSCs achieved a PCE of 26.28% under air mass (AM) 1.5G illumination, retaining 88% efficiency after 440 h of continuous illumination and maintaining 100% of its initial efficiency after 9,000 h under ambient conditions. This research contributes to developing highly efficient and stable PSCs.

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易感有机阳离子使钙钛矿太阳能电池稳定高效

在钙钛矿太阳能电池（PSCs）中实现更高的开路电压和填充因子需要最小化层间缺陷和最大化载流子的提取和传输。一种方法包括集成二维（2D）半导体间层以形成与钙钛矿吸收剂的异质结。然而，由于有机阳离子的迁移，传统的二维层往往具有较差的热稳定性。本研究考察了甲氧基苯乙基碘化铵和环己基溴化铵作为选择的有机阳离子之间的强分子间相互作用对PSCs功率转换效率（PCE）和热稳定性的增强。所得到的2D/钙钛矿结构有助于有效的电荷转移，并在85°C下表现出优异的热稳定性。优化后的PSCs在空气质量（AM） 1.5G照明下的PCE为26.28%，在连续照明440 h后保持88%的效率，在环境条件下9000 h后保持100%的初始效率。本研究有助于开发高效稳定的psc。

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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.