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Open AccessArticle

Single-Source Vapor-Deposited Cs2AgBiBr6 Thin Films for Lead-Free Perovskite Solar Cells

Shenzhen Key Laboratory of Advanced Thin Films and Applications, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
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Nanomaterials 2019, 9(12), 1760; https://doi.org/10.3390/nano9121760
Received: 9 October 2019 / Revised: 2 December 2019 / Accepted: 6 December 2019 / Published: 11 December 2019
Lead-free double perovskites have been considered as a potential environmentally friendly photovoltaic material for substituting the hybrid lead halide perovskites due to their high stability and nontoxicity. Here, lead-free double perovskite Cs2AgBiBr6 films are initially fabricated by single-source evaporation deposition under high vacuum condition. X-ray diffraction and scanning electron microscopy characterization show that the high crystallinity, flat, and pinhole-free double perovskite Cs2AgBiBr6 films were obtained after post-annealing at 300 °C for 15 min. By changing the annealing temperature, annealing time, and film thickness, perovskite Cs2AgBiBr6 solar cells with planar heterojunction structure of FTO/TiO2/Cs2AgBiBr6/Spiro-OMeTAD/Ag achieve an encouraging power conversion efficiency of 0.70%. Our preliminary work opens a feasible approach for preparing high-quality double perovskite Cs2AgBiBr6 films wielding considerable potential for photovoltaic application. View Full-Text
Keywords: lead-free; perovskite solar cell; thin film; single-source vapor deposition lead-free; perovskite solar cell; thin film; single-source vapor deposition
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Fan, P.; Peng, H.-X.; Zheng, Z.-H.; Chen, Z.-H.; Tan, S.-J.; Chen, X.-Y.; Luo, Y.-D.; Su, Z.-H.; Luo, J.-T.; Liang, G.-X. Single-Source Vapor-Deposited Cs2AgBiBr6 Thin Films for Lead-Free Perovskite Solar Cells. Nanomaterials 2019, 9, 1760.

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