Zinc acetylacetonate doping for enhanced cathode interface layer in organic solar cells

Wang, Wei1,2; Lin, Zhichao2; Li, Xin2; Tang, Yirong2; Zhong, Wentao2; Zhang, Chunhui2; Yang, Tingbin3; Liang, Yongye2,4

2022-12-01

10.1039/d2qm01106a

MATERIALS CHEMISTRY FRONTIERS   Impact Factor & Quartile

2052-1537

Interface engineering is a necessary process to achieve enhanced device performance in organic solar cells (OSCs). Herein, we report a facile and low-cost approach using zinc acetylacetonate (ZnAcac, ZAA) to dope perylene diimides functionalized with amino oxide (PDINO) as an improved cathode interface layer (CIL) for OSCs. In contrast to the pristine PDINO CIL, the PDINO + ZAA CIL exhibit lower electron affinity level and improved conductivity due to electron transfer between PDINO and ZAA. As a result, OSCs with PDINO + ZAA CIL deliver higher power conversion efficiencies (PCEs) and exhibit less efficiency decay with thicker CIL than the OSCs with PDINO CIL. With 10 nm PDINO + ZAA as the CIL, the typical PM6:BTP-eC9 OSCs can achieve an enhanced average PCE of 17.1% than PDINO OSC (16.4%), mainly due to less charge recombination and improved charge extraction and transport ability in devices. A good PCE of 15.4% can be still maintained with 70 nm CIL. Our results prove that PDINO + ZAA is a high-quality CIL and provide a simple and low-cost interface engineering strategy to optimize the CILs in OSCs.

SCI

English

Corresponding

Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices[2019B121205001] ; Shenzhen Fundamental Research Funding (Key Program)[JCYJ20200109141405950]

Chemistry ; Materials Science

Chemistry, Multidisciplinary ; Materials Science, Multidisciplinary

WOS:000899153000001

ROYAL SOC CHEMISTRY

Web of Science

1.Harbin Inst Technol, Harbin 150001, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen Key Lab Printed Elect, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Core Res Facil, Shenzhen 518055, Peoples R China
4.Southern Univ Sci & Technol, Guangdong Hong Kong Macao Joint Lab Photon Thermal, Hong Kong 518055, Guangdong, Peoples R China

Wang, Wei,Lin, Zhichao,Li, Xin,et al. Zinc acetylacetonate doping for enhanced cathode interface layer in organic solar cells[J]. MATERIALS CHEMISTRY FRONTIERS,2022.

Wang, Wei.,Lin, Zhichao.,Li, Xin.,Tang, Yirong.,Zhong, Wentao.,...&Liang, Yongye.(2022).Zinc acetylacetonate doping for enhanced cathode interface layer in organic solar cells.MATERIALS CHEMISTRY FRONTIERS.

Wang, Wei,et al."Zinc acetylacetonate doping for enhanced cathode interface layer in organic solar cells".MATERIALS CHEMISTRY FRONTIERS (2022).