Details

Autor(en) / Beteiligte

• Yin, Junli
• Shi, Xiaoyu
• Wang, Lingyuan
• Yan, He
• Chen, Shangshang

Titel

High‐Performance Inverted Perovskite Solar Devices Enabled by a Polyfullerene Electron Transporting Material

Ist Teil von

• Angewandte Chemie, 2022-12, Vol.134 (52), p.n/a

Ort / Verlag

Weinheim: Wiley Subscription Services, Inc

Erscheinungsjahr

2022

Quelle

Access via Wiley Online Library

Beschreibungen/Notizen

• Electron transporting materials (ETMs) play vital roles in determining the efficiency and stability of inverted perovskite solar cells. The widely used PCBM is prone to undesirable aggregation and migration in a cell, thus impairing device stability. In this work, we develop a new type of ETMs by polymerizing C60 fullerene with an aromantic linker unit. The resultant polyfullerene (PFBS‐C12) not only maintains the good optoelectronic properties of fullerenes, but also can address the aforementioned aggregation problem of PCBM. The polyfullerene‐based blade‐coated cells exhibit a high efficiency of 23.2 % and good device stability that maintain 96 % of initial efficiency after >1300‐hour light soaking. An aperture efficiency of 18.9 % is also achieved on a 53.6‐cm2 perovskite mini‐module. This work provides a new strategy for designing ETMs that retain the key figure‐of‐merits of conventional fullerene molecules and enable more stable perovskite solar devices simultaneously. A new polyfullerene material (PFBS‐C12) is developed that can work efficiently as the electron transporting material of p‐i‐n perovskite solar cells (PSCs). PFBS‐C12 retains the figure‐of‐merits of conventional fullerene molecules, and shows suppressed aggregation and more conformal coverage on perovskites compared to PCBM. As a result, the p‐i‐n PSCs based on PFBS‐C12 realize a high efficiency of 23.2 % with good device stability.