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WO3:AgInS2 quantum dot electron transport layers in enhanced perovskite solar cells

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Abstract

The development of the electron transport layers (ETL) was crucially important for the improvement of charge extraction and transportation in perovskite solar cells (PSCs). Here, dual electron transport layers of TiO2 and WO3 mixed with different sizes of AgInS2 quantum dots (TiO2/WO3:AgInS2 QDs) were fabricated for planar perovskite solar cells. The peak intensity of the photoluminescence (PL) of the synthesized AgInS2 QDs were redshifted from 554 to 655 nm with an increased radius of AgInS2 QDs from 3.82 ± 0.52 to 7.78 ± 1.37 nm. The PL intensity of the perovskite film on TiO2/WO3:AgInS2 QDs was quenched by the addition of AgInS2 QDs. The improved device stability was probably caused by the WO3:AgInS2 QDs layer protecting the interface of perovskite layers from direct contact with TiO2 to prevent UV decomposing. Therefore, the TiO2/WO3:AgInS2 QDs as electron transport layers promoted the perovskite solar cell performance and enhanced the long-term stability.

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Acknowledgments

This work has been supported by the National Science and Technology Development Agency (NSTDA) in Thailand (P1952316) and the Energy Regulatory Commission (ERC) of Thailand. The authors would like to thank the support from Mr. Khathawut Lohawet from the innovative nanocoating research team for useful discussion, fabrication and characterization of PSCs and College of Nanotechnology, King Mongkut’s Institute of Technology Ladkrabang for operations XRD, PL and UV-Vis spectroscopy. We are also grateful to Prof. Dr. S. Seraphin (Professional Authorship Center, NSTDA) for fruitful discussions in revising the manuscript.

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Authors and Affiliations

  1. College of Materials Innovation and Technology King Mongkut’s Institute of Technology Ladkrabang, Ladkrabang, Bangkok, 10520, Thailand

    Chaowaphat Seriwattanachai, Jiti Nukeaw & Navaphun Kayunkid

  2. National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Pathum Thani, 12120, Thailand

    Anusit Kaewprajak, Nuttaya Sukgorn & Pisist Kumnorkaew

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  1. Chaowaphat Seriwattanachai
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Seriwattanachai, C., Kaewprajak, A., Sukgorn, N. et al. WO3:AgInS2 quantum dot electron transport layers in enhanced perovskite solar cells. Journal of Materials Research 38, 1882–1893 (2023). https://doi.org/10.1557/s43578-023-00967-1

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