High-Performance Inverted Perovskite Solar Cells with Operational Stability via n-Type Small Molecule Additive-Assisted Defect Passivation
Cited 0 times inCited 0 times in
- High-Performance Inverted Perovskite Solar Cells with Operational Stability via n-Type Small Molecule Additive-Assisted Defect Passivation
- Koo, Donghwan; Cho, Yongjoon; Kim, Ungsoo; Jeong, Gyujeong; Lee, Junghyun; Seo, Jihyung; Yang, Changduk; Park, Hyesung
- Issue Date
- Wiley-VCH Verlag
- Advanced Energy Materials
- Significant efforts have been devoted to modulating the grain size and improving the film quality of perovskite in perovskite solar cells (PSCs). Adding materials to the perovskite is especially promising for high-performance PSCs, because the additives effectively control the crystal structure. Although the additive engineering approach has substantially boosted the efficiency of PSCs, instability of the perovskite film has remained a primary bottleneck for the commercialization of PSCs. Herein, a newly conceived bithiophene-based n-type conjugated small molecule (Y-Th2) is introduced to PSCs, which simultaneously enhances the performance and stability of the cell. The Y-Th2 effectively passivates the defect states in perovskite through Lewis acid–base interactions, increasing the grain size and quality of the perovskite absorber. An inverted PSC containing the Y-Th2 additive achieves a power conversion efficiency of 21.5%, versus 18.3% in the reference device. The operational stability is also considerably enhanced by the improved hydrophobicity and intermolecular hydrogen bonds in the perovskite. © 2020 Wiley-VCH GmbH
- Appears in Collections:
- MSE_Journal Papers
- Files in This Item:
- There are no files associated with this item.
can give you direct access to the published full text of this article. (UNISTARs only)
Show full item record
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.