Improved Efficiency and Stability of Perovskite Solar Cells Using a Difluorobenzothiadiazole-Based Interfacial Material

Zhao，Dawei1; Dai，Shijie1; Li，Ming1; Wu，Yinghao1; Zheng，Lingling1; Wang，Yuanhao2; Yun，Da Qin1

2021

10.1021/acsaem.1c01668

ACS Applied Energy Materials   影响因子和分区

2574-0962

2574-0962

The humidity stability of the perovskite solar cell (PSC) is an important issue, which limits its commercialization and practical application. To construct a waterproof interface upon a perovskite film is a valid strategy to improve the stability. In this article, a difluorobenzothiadiazole-based polymer, PffBT4T-C9C13, is employed as an interfacial material and a water barrier on the perovskite by a well-designed deposition method. A uniform perovskite film with a large crystal grain is obtained after the decoration of the polymer owing to its positive impact on the crystal growth. PffBT4T-C9C13 not only protects perovskite from water corrosion but also passivates the surface defects of perovskite. Charge accumulation at the interface is sufficiently suppressed, which is of benefit for the charge transport and extraction. As a result, PSCs with the structure of ITO/TiO2/MA1-xFAxPbI3/PffBT4T-C9C13/spiro-MeOTAD/Ag achieve the highest power conversion efficiency of 20.21%. More importantly, remarkable improvement of the humidity stability is achieved for both perovskite films and PSCs with PffBT4T-C9C13. The unencapsulated device retains more than 80% of its highest power conversion efficiency after 14 days' aging in humidity of about 50%, and no apparent decomposition of the modified film is observed in 93 days. Therefore, this scheme provides a valuable approach to develop highly efficient and highly stable PSCs.

conjugated polymer defect passivation humidity stability interfacial modification planar perovskite solar cells

EI ; SCI

英语

其他

Natural Science Foundation of China[61605164,61705258] ; Fundamental Research Funds for the Central Universities[20720190027]

Chemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000711236300025

AMER CHEMICAL SOC

20214311080195

Chromium compounds ; Conjugated polymers ; Conversion efficiency ; Efficiency ; Passivation ; Perovskite ; Perovskite solar cells ; Polymer solar cells ; Surface defects

Minerals:482.2 ; Energy Conversion Issues:525.5 ; Protection Methods:539.2.1 ; Solar Cells:702.3 ; Organic Polymers:815.1.1 ; Production Engineering:913.1 ; Materials Science:951

2-s2.0-85117848543

Scopus

1.School of Energy Research,Xiang'an Campus,Xiamen University,Xiamen,Fujian,361100,China
2.SUSTech Engineering Innovation Center,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China

Zhao，Dawei,Dai，Shijie,Li，Ming,et al. Improved Efficiency and Stability of Perovskite Solar Cells Using a Difluorobenzothiadiazole-Based Interfacial Material[J]. ACS Applied Energy Materials,2021,4(10):10646-10655.

Zhao，Dawei.,Dai，Shijie.,Li，Ming.,Wu，Yinghao.,Zheng，Lingling.,...&Yun，Da Qin.(2021).Improved Efficiency and Stability of Perovskite Solar Cells Using a Difluorobenzothiadiazole-Based Interfacial Material.ACS Applied Energy Materials,4(10),10646-10655.

Zhao，Dawei,et al."Improved Efficiency and Stability of Perovskite Solar Cells Using a Difluorobenzothiadiazole-Based Interfacial Material".ACS Applied Energy Materials 4.10(2021):10646-10655.