Electron Transport Layers in Perovskite Solar Cells

Jafari, Fatemeh; Ahmadpour, Mehrad; Aryal, Um Kanta; Ahmad, Mariam; Prete, Michela; Torabi, Naeimeh; Turkovic, Vida; Rubahn, Horst‐Günter; Behjat, Abbas; Madsen, Morten

doi:10.1002/9783527825790.ch9

Cited by 2 publications

(1 citation statement)

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“…[23][24][25][26] Given the critical role of ETLs in PSC performance, tremendous efforts are ongoing for the discovery of new electron transport materials to achieve high PCE. [11,12,27,28] While these studies focus on the design of new molecular materials capable of acting as efficient ETLs, there are still important questions surrounding existing materials in use. Specifically, the addition of (often chiral) solubilizing groups to a range of ETLs can result in the generation of stereoisomeric mixtures.…”

Section: Introductionmentioning

confidence: 99%

Enantiomerically Pure Fullerenes as a Means to Enhance the Performance of Perovskite Solar Cells

Shi

Zhuang

Zhou

et al. 2023

Advanced Energy Materials

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The rapidly advancing improvements in perovskite solar cells (PSCs) are driven, in part, by the inclusion of suitable electron transport layers (ETLs) in high performance devices. Fullerene derivatives are particularly useful ETLs in PSCs, but many of the utilized fullerenes are present as isomeric mixtures. The opportunities presented by single‐isomer, single‐enantiomer fullerenes in PSCs are poorly understood. Here, inverted PSCs are prepared using bis[60]phenyl‐C61‐butyric acid methyl ester derivative (anti)16,17‐bis[60]PCBM, comparing the performance of enantiomerically pure material to the corresponding racemate. The single enantiomer devices are found to have an improved performance, giving a power conversion efficiency (PCE) of 23.2%, compared to 20.1% PCE for the racemate. It is also shown that enantiomerically pure PSC modules can be prepared with a state‐of‐the‐art PCE of 20.1%. Such excellent performance for the single enantiomer devices is accompanied by enhanced operational stability. This study thus provides strong evidence that single isomer ETLs can provide important improvements in PSC performance and it positions chiral fullerenes as an exciting material class moving forward.

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