Siddiqui Qamar Tabrez, Kotta Ashique, Seo Inseok, Seo Hyung-Kee
School of Chemical Engineering, Clean Energy Research Center, Jeonbuk National University, Jeonju 54896, Republic of Korea.
Future Energy Convergence Core Center, Jeonbuk National University, Jeonju 54896, Republic of Korea.
ACS Omega. 2024 Mar 4;9(11):13373-13381. doi: 10.1021/acsomega.3c10373. eCollection 2024 Mar 19.
Hybrid organic-inorganic perovskites have been investigated for their potential to serve in next-generation perovskite solar cells (PSCs). While PSC technology is approaching commercialization, thermal and moisture stabilities remain a concern. Here, we describe the assembly of PSCs using an imidazoanthraquinone derivative (AQ) as a small organic additive to enhance the device performance and stability. Unlike polymer additives, AQ is easy to synthesize and is more economical. AQ was synthesized because it has both carbonyl and imidazole functional groups. The presence of C=O and N-H groups results in coordination interaction with Pb and I of the perovskite. Addition of the AQ molecule to methylammonium lead iodide leads to the formation of a superior crystalline perovskite film with fewer defects and enhanced stability under humid conditions. The use of optimized perovskite films enhanced device power conversion efficiency (PCE = 17.21%) compared to pristine perovskite (PCE = 13.88%). Unencapsulated optimized devices retained 90% of the initial power conversion efficiency for 30 days at a relative humidity of nearly 35%. The optimized films also exhibited superior thermal stability to that of pristine perovskite films.
有机-无机杂化钙钛矿因其在下一代钙钛矿太阳能电池（PSC）中的应用潜力而受到研究。虽然PSC技术正接近商业化，但热稳定性和湿度稳定性仍然是一个问题。在此，我们描述了使用咪唑蒽醌衍生物（AQ）作为一种小型有机添加剂来组装PSC，以提高器件性能和稳定性。与聚合物添加剂不同，AQ易于合成且更经济。合成AQ是因为它同时具有羰基和咪唑官能团。C=O和N-H基团的存在导致与钙钛矿中的Pb和I发生配位相互作用。将AQ分子添加到甲基碘化铅中会形成一种缺陷更少且在潮湿条件下稳定性增强的优质结晶钙钛矿薄膜。与原始钙钛矿（PCE = 13.88%）相比，使用优化的钙钛矿薄膜提高了器件的功率转换效率（PCE = 17.21%）。未封装的优化器件在相对湿度近35%的条件下30天内保持了初始功率转换效率的90%。优化后的薄膜还表现出比原始钙钛矿薄膜更好的热稳定性。
