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Efficient and Stable Methylammonium-Free Tin-Lead Perovskite Solar Cells with Hexaazatrinaphthylene-Based Hole-Transporting Materials.
- Source :
-
ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2022 Feb 09; Vol. 14 (5), pp. 6852-6858. Date of Electronic Publication: 2022 Jan 26. - Publication Year :
- 2022
-
Abstract
- Incorporating non-aqueous hole-transporting materials (HTMs) to replace the widely used PEDOT:PSS is favorable for improving the stability of tin-lead perovskite solar cells (Sn-Pb PSCs). Herein, hexaazatrinaphthylene (HATNA) is found to be a promising HTM building block for Sn-Pb PSCs. By introducing triphenylamine (TPA) and methoxy-triphenylamine into the HATNA core, molecular energy levels and surface wettability can be well regulated, and a high hole mobility and thermal stability can be maintained. Moreover, a homogeneous Sn-Pb perovskite film with low Sn <superscript>4+</superscript> contents and vertically orientated grains can be prepared on the substrate TPA-HATNA . Compared with PEDOT:PSS, the optimal TPA-HATNA -based methylammonium-free device enables a 70 mV increase in V <subscript>OC</subscript> , delivering a remarkable PCE exceeding 18% (certified 16.4%). Impressively, the TPA-HATNA -based devices without encapsulation retain 90% efficiency after aging for 600 min under maximum-power-point tracking. Our work provides alternative HTMs for boosting the performance of Sn-Pb PSCs.
Details
- Language :
- English
- ISSN :
- 1944-8252
- Volume :
- 14
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- ACS applied materials & interfaces
- Publication Type :
- Academic Journal
- Accession number :
- 35080172
- Full Text :
- https://doi.org/10.1021/acsami.1c22659