Designing a Perylene Diimide/Fullerene Hybrid as Effective Electron Transporting Material in Inverted Perovskite Solar Cells with Enhanced Efficiency and Stability

Zhenghui Luo; Fei Wu; Teng Zhang; Xuan Zeng; Yiqun Xiao; Tao Liu; Cheng Zhong; Xinhui Lu; Linna Zhu; Shihe Yang; Chuluo Yang

doi:10.1002/anie.201904195

Designing a Perylene Diimide/Fullerene Hybrid as Effective Electron Transporting Material in Inverted Perovskite Solar Cells with Enhanced Efficiency and Stability

Angew Chem Int Ed Engl. 2019 Jun 17;58(25):8520-8525. doi: 10.1002/anie.201904195. Epub 2019 May 13.

Authors

Zhenghui Luo^{1

2}, Fei Wu³, Teng Zhang⁴, Xuan Zeng¹, Yiqun Xiao⁵, Tao Liu², Cheng Zhong¹, Xinhui Lu⁵, Linna Zhu³, Shihe Yang^{4

6}, Chuluo Yang^{1

2}

Affiliations

¹ Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, Department of Chemistry, Wuhan University, Wuhan, 430072, P. R. China.
² Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, P. R. China.
³ Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energy, Faculty of Materials & Energy, Southwest University, Chongqing, 400715, P. R. China.
⁴ Nano Science and Technology Program, Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, P. R. China.
⁵ Department of Physics, Chinese University of Hong Kong, New Territories, Hong Kong, P. R. China.
⁶ Guangdong Key Lab of Nano-Micro Material Research, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Xili University Town, Shenzhen, 518055, Guangdong, P. R.China.

PMID: 31021047
DOI: 10.1002/anie.201904195

Abstract

Electron transport materials (ETM) play an important role in the improvement of efficiency and stability for inverted perovskite solar cells (PSCs). This work reports an efficient ETM, named PDI-C₆₀ , by the combination of perylene diimide (PDI) and fullerene. Compared to the traditional PCBM, this strategy endows PDI-C₆₀ with slightly shallower energy level and higher electron mobility. As a result, the device based on PDI-C₆₀ as electron transport layer (ETL) achieves high power conversion efficiency (PCE) of 18.6 %, which is significantly higher than those of the control devices of PCBM (16.6 %) and PDI (13.8 %). The high PCE of the PDI-C₆₀ -based device can be attributed to the more matching energy level with the perovskite, more efficient charge extraction, transport, and reduced recombination rate. To the best of our knowledge, the PCE of 18.6 % is the highest value in the PSCs using PDI derivatives as ETLs. Moreover, the device with PDI-C₆₀ as ETL exhibits better device stability due to the stronger hydrophobic properties of PDI-C₆₀ . The strategy using the PDI/fullerene hybrid provides insights for future molecular design of the efficient ETM for the inverted PSCs.

Keywords: electron transport materials; fullerenes; perovskite solar cells; perylene diimides; power conversion efficiency.

Abstract

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