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Dual-Interface Modification for Inverted Methylammonium-Free Perovskite Solar Cells of 25.35% Efficiency with Balanced Crystallization
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2024-03-08 , DOI: 10.1002/aenm.202304486 Yiting Zheng 1 , Congcong Tian 1 , Xueyun Wu 1 , Anxin Sun 1 , Rongshan Zhuang 1 , Chen Tang 1 , Yuan Liu 1 , Zihao Li 1 , Beilin Ouyang 1 , Jiajun Du 1 , Ziyi Li 1 , Xiling Wu 1 , Jinling Chen 1 , Jinyu Cai 1 , Chun‐Chao Chen 1
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2024-03-08 , DOI: 10.1002/aenm.202304486 Yiting Zheng 1 , Congcong Tian 1 , Xueyun Wu 1 , Anxin Sun 1 , Rongshan Zhuang 1 , Chen Tang 1 , Yuan Liu 1 , Zihao Li 1 , Beilin Ouyang 1 , Jiajun Du 1 , Ziyi Li 1 , Xiling Wu 1 , Jinling Chen 1 , Jinyu Cai 1 , Chun‐Chao Chen 1
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In a methylammonium-free (MA-free) composition, the uncontrollable crystallization process between Cs and formamidine (FA) currently hinders its efficiency enhancement, especially in inverted perovskite solar cells (PSCs). Here, a dual-interface modification of perovskite films is proposed by simultaneously introducing additives and surface passivators. In particular, (aminomethyl)phosphonic acid (AMP) is introduced into the precursor solution to balance crystallization by inducing the preferential crystallization of FA through the specific formation of strong hydrogen bonds with FA. In addition, AMP spontaneously sinks and anchors to the buried interface to fill the voids of the self-assembled monolayer (SAM) via the covalent bonds formed by ─PO3H2 and FTO. Subsequently, by the sequential modification of perovskite surface with 2-(3-fluorophenyl)ethylamine iodide (mF-PEAI) and piperazine diiodide (PDI), a uniform surface potential is achieved and recombination losses at the interface are minimized. Notably, the dual-interface-modified inverted MA-free PSCs achieve a state-of-the-art power conversion efficiency (PCE) of 25.35% (certified: 24.87%) with a satisfactory Voc of 1.17 V based on the bandgap of 1.52 eV. Importantly, the unencapsulated devices maintain 92.8% and 91.7% of the initial efficiency after 1000 h of maximum power output (MPP) tracking and >800 h of heating at 85 °C, respectively, confirming excellent operational and thermal stability.
中文翻译：
双界面改性平衡结晶效率达 25.35% 的倒置甲基铵钙钛矿太阳能电池
在不含甲基铵（MA-free）的组合物中，Cs和甲脒（FA）之间不可控的结晶过程目前阻碍了其效率的提高，特别是在倒置钙钛矿太阳能电池（PSC）中。在这里，提出了通过同时引入添加剂和表面钝化剂来对钙钛矿薄膜进行双界面改性。特别是，将（氨甲基）膦酸（AMP）引入前体溶液中，通过与 FA 形成强氢键，诱导 FA 优先结晶，从而平衡结晶。此外，AMP通过─PO 3 H 2 和FTO形成的共价键自发下沉并锚定到埋入界面，以填充自组装单层（SAM）的空隙。随后，通过用2-(3-氟苯基)乙胺碘化物(mF-PEAI)和哌嗪二碘化物(PDI)顺序修饰钙钛矿表面，实现了均匀的表面电势，并最大限度地减少了界面处的复合损失。值得注意的是，双接口改进的反向无 MA PSC 实现了最先进的功率转换效率 (PCE) 25.35%（认证：24.87%）以及令人满意的 V oc 1.17 V 基于 1.52 eV 的带隙。重要的是，未封装的器件在最大功率输出 (MPP) 跟踪 1000 小时和在 85 °C 加热超过 800 小时后分别保持了 92.8% 和 91.7% 的初始效率，证实了出色的操作和热稳定性。
更新日期：2024-03-08
中文翻译：
双界面改性平衡结晶效率达 25.35% 的倒置甲基铵钙钛矿太阳能电池
在不含甲基铵（MA-free）的组合物中，Cs和甲脒（FA）之间不可控的结晶过程目前阻碍了其效率的提高，特别是在倒置钙钛矿太阳能电池（PSC）中。在这里，提出了通过同时引入添加剂和表面钝化剂来对钙钛矿薄膜进行双界面改性。特别是，将（氨甲基）膦酸（AMP）引入前体溶液中，通过与 FA 形成强氢键，诱导 FA 优先结晶，从而平衡结晶。此外，AMP通过─PO 3 H 2 和FTO形成的共价键自发下沉并锚定到埋入界面，以填充自组装单层（SAM）的空隙。随后，通过用2-(3-氟苯基)乙胺碘化物(mF-PEAI)和哌嗪二碘化物(PDI)顺序修饰钙钛矿表面，实现了均匀的表面电势，并最大限度地减少了界面处的复合损失。值得注意的是，双接口改进的反向无 MA PSC 实现了最先进的功率转换效率 (PCE) 25.35%（认证：24.87%）以及令人满意的 V oc 1.17 V 基于 1.52 eV 的带隙。重要的是，未封装的器件在最大功率输出 (MPP) 跟踪 1000 小时和在 85 °C 加热超过 800 小时后分别保持了 92.8% 和 91.7% 的初始效率，证实了出色的操作和热稳定性。
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